Nghiên cứu địa tầng và trầm tích của cát đỏ khu vực phan thiết và đánh giá tiềm năng khoáng sản liên quan

a t
khu vc Phan Thi



Nguyn Quang Lc


i hc Khoa hc T 
Lu ThS.  a cht hc; : 60 44 55
ng dn: GS.TS. Trn Nghi
o v: 2012


Abstract.  u kin t  
m trng tru kin vng
n.

Keywords. a cht hc; a tng; Tr; ; n; Phan Thit


Content
MỞ ĐẦU

H tng Phan Thi cp t a cht  Vit Nam [5,7,19]
v Phan Thi Phan Thing Phan Thit, tng
 Phan Thit, mt thc th trc t ng mnh,
n s i va chc. c
 u cu hn ch   ngun
gc i c Phan Thi rc di ven bin t
  t, b t t  y

 m ng
ci, ti Pleistocen mum-
gin nh i,
cng.
T  
c bi   n nay nhia cht Vit nam
  t nhi nhau nh ngun gc, v 
a t o phc v  b a cht   l 
--1988), Nguyn Ng
 ra mt h ttui Q
1
2-3
hoc Q
1
2
. Tr
r n 3 t bin tin Q
1
1
, Q
1
2-3a
 Q
1
3b

n nay vio trc h t Phan
Thit  c quan vt qu  ng c u
 n t thuc h tng Phan
Thit ch- mt ln.

T ng hu hi  b a cha v
 v kin ta cha v khu vc Phan
Thit  a ch
 tr n t-
zircon, khng ch c chinh ng ca  
qu.  luch d

-  h  liu
- ng thch hc b ri
-  s 
o
)
- n t cha st
- t nt nh bng dung dch nng, k
hai mc.
- i tuyi bt hunh quang thch anh.
- ng tr
- a t Phan Thit
-  g
 kha chi tit mt s mt cu, nh m
n vt chtu ki tin cho h t.
Ca lum:
Mở đầu
Chương 1. Vị trí địa lý, điều kiện tự nhiên, kinh tế nhân văn
Chương 2. Đặc điểm trầm tích và tướng trầm tích
Chương 3. Điều kiện thành tạo và triển vọng khoáng sản
Kết luận
  c s tu ki c
h a cht  Tng ca chn, Ban
ch nhia chc bi c nht sc tn

a GS.TS Trn Nghi.   c s  



Chương I
ĐẶC ĐIỂM ĐỊA LÝ TỰ NHIÊN, KINH TẾ, NHÂN VĂN

I.1. VỊ TRÍ ĐỊA LÝ
 rt d n ra nh  t ng
mnh v ma cht. Dc ven bin t , Maviec, Tuy Phong, Bc Phan
Thit, Nam Phan Thi  vi din l
  n 200m. T u  b bin Nam Phan
Thit,  c
thm bi    ng. Chi
ng b bin khong 270 km; chic l 1A khong 235 km. Chiu r
khu vc t 2,0 km n 21,5 km. Tng dikhu vc u tra u  1.262 km
2
.
I.1.1. Khu vực Tuy Phong - Bắc Phan Thiết
Khu vc Tuy Phong - Bc Phan Thit nm v  Phan Thit, theo
di ven bin t  thu Phan Thing 70 km n th
trn Tuy Phong.
Diu thuc a ph 
Minh, H  tra thuc huyn Tuy Phong, tn;
      ng
ng, huyn B: Hm, Hm c, huym
Thun B     m Tin, M ,   Phan Thit, t 
Thun. Dia khu v km
2
.

I.1.2. Khu vực Hàm Thuận Nam
Khu vn Nam n-  Phan Thit, t
Thu khong 1,5 km). V a gin
 Phan Thin
Thung, huynh
n; Dic 523 km
2
, gii hn b

 th
I.2. ĐẶC ĐIỂM ĐỊA LÝ TỰ NHIÊN
I.2.1. Đặc điểm địa hình
Di ven bin t Ninh Thun ba - i chin 300 km 
mng bm
di  i ven b cao t 500 m n
1.000 mnh nhn da hmi thp
 rmng bng chim phn
ln di mi dn ra bin v cao tuyi t mn gn hai
m m
I.2.2. Mạng sông, suối, bàu nước và bờ biển
 
 hin theo
mn ly yu, nhiu ch  lc.
Mm t song ch mc th
 ng thmi nh,
phn h m  mn ln b cn kit hohy
rt yu.
 ng ln cung cc ch yu cho sinh ho
nghip ti mt s MT
m th ng b to ra d  vi

o, mn: MMMm 
nm, vnh Phan Thiu t m cho
ng b m phc tp.
I.2.3. Thảm thực vật
Hu hu b tri hon ci ci. Hin
nay, mt s c vc trng mi ho  ph xanh  i
trc. Thm thc vt t   y
cmm nmt s khu vc thc vt t c bo tn
ng c dng m Thun Namn.
I.2.4. Khí hậu, hải văn
I.2.4.1. Khí hậu
a/ Nhiệt độ
Khu vc tn nhi m. Hu ht
 m ng t 26,5 - 27,0
0
m g, nn nhi c
Thun vn  mc xp x m (TBNN) m
m, nhi p nhng x
(24,5 - 24,7
0
C), t c  - 28,4
0
C) sau
i gim dm m c th nh nht trong m
 
ho m: t  

b/ Chế độ mưa
 khu vc t mmm
m

Mu t m sau vng m bin t 270 - 470
mm, mmu t ng vi thi k hong ca gm
Nam. ng m  t,  m ph bin
t 1.100 n 1.200 mm, xp x m 
bin t 1.800 n 2.500 mm 100 n 200 mm. Tng m
m 2007 - 2009 ti tn t 1.200 m n 2.500 mm gn bng
n m.
c/ Độ ẩm
 m m ng t n 81%,  mc xp x u
m m i t  ch 2 n 4%,
mu mm m ch 4 n  m
cao nhi mm m thp nhm.
d/ Nắng
Khu vi gian nng ln. Tng s gi nm t
2.660 n 2.700 gi. So v nhim, tng s gi nng nhm gn p
 100 - 150 gi.
e/ Bốc hơi
Tng b khu vi nh. Tng b
m gt t 1.500 - 1.700 mm. Tng b trong  ng t
112 n 149 mmng bt 149 mm i
m p nht 112 mm i mm.
f/ Các hiện tượng thời tiết khác
- p nhim khu vn t 
m, nhiu nhMi thi k hong
cmmi hi t nhii theo chu k u t ng 
 
- hm ng h tuTt hin
 nht hin hu ht nh
li. m thi tit hin rt sm, t trung tu.
Thi gian ka loi thi tim

khong h tung tu ng rt nhin
i s ng sn xut.
- mc: n hu ng. m
n khu vng t m m
11 hoc thm i gian knh thong
m 
- m n gn lin vi thi k mm u thi k
mmmnh nhn thi k bmm hong m
km ng bng ven bin. Tnh
n chu ng cmm mnh m nhm theo l
ng hay xy ra  a tnh.
I.2.4.2. Hải văn
Hoàn lưu: mm m
mnam m 
mmm
m

(theo Lê Đức Tố, 2003)
Sóng:  mm
mmm-
3,5 mm 20 - 30%, m m 10 - 20%.
Thủy triều: m  m  
 
2,0 - 3,5 m.
I.3. KINH TẾ, NHÂN VĂN
I.3.1. Giao thông
Khu vu c l 1A ch bin t m mc
kilomc bi phc v n kinh t i nhm g
c m rp hom mng ven bic tri
nh  c ven bin. H thng st  qua c n tin cho giao

n chuyTng Phan Thip m c
phc v ng thy.
I.3.2. Dân cư
 ymi
p trung vi m cao   trn, th . H sng v
min m t
 nghip ch yp, mt b phu
tra ch y n m t.
 h tng, trmmi hoc ci tp khang
trang hu king h  m  i tn nay
mt s n trong  p, nn m
ch v m.
I.3.3. Các hoạt động kinh tế - xã hội trong vùng
Tim n du lm ni bt ca tn v
hm nng m. Cnh quan t   
bim a tm 
 ht ti. H thch v h tng phc v du l
ng b. T tim m 
u doanh nghip t
Mt li th  bit ln
m l  hm
ph p thun cho doanh nghing mt s n  n: Tuy
Phong, B       n nay ch       Tuy
ng.
I.4. LỊCH SỬ NGHIÊN CỨU
I.4.1. Giai đoạn trước năm 1975
  n Nam gi         a cht 
 
c.
- T   ca ch

Fromaget, Hoffet, Shepard th hin qua vic l a cht t l 1:500.000 t Nha
Trang, b a cht t l  a ch

- T 
bin c   a cht: Plarala, Nguyn Hu Kh     
Nguyn Tn Thi, Phm Tuyi
hoc cc bc ng dng thc tin.
I.4.2. Giai đoạn sau năm 1975
a ch
s thng.
- - 1979, Nguyp b a
cht t l  Min Nam.
- - a cht ca Viu
a chn Vit Nam ti u ilmenit ven bin Vit Nam.
- - Phm t m 
n Hi. Phu thua phn

  n g
2
3
ven bi
n vng v sa ng ilmenit t
20 - 80 kg/m
3
, zircon t n 20 kg/m
3
. Tr ng 1.954.454 tn ilmenit; 420.542 tn zircon.
   ng cp C
2
n;

68.377,29 tn zircon.
- Nn Vit Tht qu 
trin vc bin t 
   c   m t         
nghim, Thi nhn mc.
- -  m -
n H ng tr t qung (ilmenit, zircon,
rutin, leucoxen, anatas) cp C
1
+ C
2
 n;
n.
- - 1989, Nguyn Th u v trin v
titan ven bin Vi ci h thng v u kia ch
t n Vi  c trin
v.
- 1988, 





.n.

 b a cht
i - , t l p
o b ri ven bin Nam Trung B thuc tr T  
theo ngun gc trn bc. Trong t Phan Thi  h tng
Phan Thit cht nng: ilmenit 2 - 5 kg/m

3
, rutil 0,06 - 0,15 kg/m
3
, zircon 0,2 - 0,5
kg/m
3
.
- n H
- nh: tr tng Phan Thit (m
b
Q
1
2-
3
pt) rt qung ilmenit t n 3 kg/m
3

65- 150 g/m
3
; zircon t n 250 g/m
3
.
- - 1994, Nguyn Bia chn sa
b (0 - c) Mi- c
m,  - Cam
Ranh 

p theo.
- 998,  .n.


  b a ch
 Phan Thit, t l c
 c        tr T  u hiu cha
ilmen.
- - 2001, Nguy a chm
 - o, t l i
n: thit ling 
 cn khu m ng hp kt qu mt s l 
 ng ilmenit b   h tng
Phan Thit.
- nh Tia cha
ch     a ch  n Nam Trung B t 0 -   c  t l
t s  t l - 
ch yu trong trn (ngun gc bi h tng Phan Thit.
- u kt qu 
 n vn t n
a - nhnh trong t thuc h tng Phan Thi 
ch    -   p. T nh    a cht Trung
Trung B   thuc h tng Phan Thit ven bin
Ninh Thu Thu   kt qu
 kt lun: t thuc h tng Phan Thit ch-
n vp v u t 
ngh: cn t ch- zircon trong t
a - 
-  - 2008, Tr  a cht Trung Trung B thi
 trin vn t a -

2
thuc tnh Ninh Thua - 
 n vi t

 p 3361.988.848 tt n
2.605.012 tn.
I.5. ĐỊA TẦNG CÁT ĐỎ PHAN THIẾT
a ch) ca h tng Phan Thi rt so
v a chn Nam Trung B. T l dc 2
c l 1A thunh, ding 15 km
2
, phn b ph b
khong 25 km
2
. Ti khu Bc Phan Thit t l  huyn
B  n B  Phan Thit, din  ng 520 km
2
. Ti khu v 
Thu   Phan Thi
 u rng 7 km, di
khong 132,0 km
2
 rn huy
n tra h tng Phan Thit gm ch yt nh n v
bi t tr loang l tr 
 bia h tng. Trm u t
t, ph bt chnh ha ch tng
mQ
1
1
mn), h t
2
 ph b
bin Pleistocen mun Holocen.

I.5.1. Khu vực Tuy Phong - Bắc Phan Thiết
t ca ch.2, T.10, T.22, T.34, T.48 thuc
khu vc Tuy Phong - Bc Phan Thio tr tng Phan Thic chia
p:
Tập 1 (mQ
1
pt
1
ch anh h













  


trng, gn k

, ph  ma tr t
2



1
mn), Nha Trang (K
2
nt)  (K
2
). 

 tp t 9,0 m
ng t n 17,3 m,  10,1 m.
 0,706%; 
0,103% , b

19,4%.
Tập 2 (mQ
1
pt
2
ch anh h












 , 


trng, 

, gn k

, 



p 1 2 





. 








 -   n 50,0 m, 

 33,5 m; chi
qung t n 48,6 m, 32,1 m. 

0,727%;  0,129% 
15,5%.
Tập 3 (mQ
1
pt
3
 thch anh h











  nht, gn
k

, 



 p 2 3 






. 

 p t n 49,5 m,
ng t  25,7 m; 
 0,638%;  0,103%
12,038%.
Tập 4 (mQ
1
pt
4
ch anh h







  nh 
thm, gn kt 

, 



 p 3 4 






. 

p t n
ng t n 61,9 m,  32,6 m. 














 0,630%;  


0,102% 11,257%.
I.5.2. Khu vực Hàm Thuận Nam
t ca ch .76, T.102, T.122 thuc khu
vo tr tng Phan Thit ch xut hin 3 tp.
Tập 2 (mQ
1
pt

2
ch anh h











 , 


trng, 

, gn k

. T bt chnh ht Ti
(N
2
a h tng Nha Trang (K
2
 granitoid phc h  (K
2
).





p t n 25,0 m, 

16,5 m; ching t n 23,5
m, 14,8 m.   n 0,467%, 


0,401%;  

 0,073% 
20,162% (xem Bảng I.9).
Tập 3 (mQ
1
pt
3
ch anh h











  nht, gn
k


, 



 p 2 3. 





. 

y t
chi 23,0 m.  0,425%;
 0,051%  13,490% (xem
Bảng I.9).
Tập 4 (mQ
1
pt
4
ch anh h







  nh 

thm, gn k

, 



 p 3 4 





. 


30,0 m; chi 27,0 m;  


0,382%;  0,049% 
14,511%


Chương II
ĐẶC ĐIỂM TRẦM TÍCH VÀ TƯỚNG TRẦM TÍCH

II.1. ĐẶC ĐIỂM TRẦM TÍCH
II.1.1 Đặc điểm thành phần vật chất
 u vt l l khoan thu thc  ng mt s mt ct cho
tng khi  tng khu v  c
n vt cht cho h t

Mặt cắt 1, ti Sua h tng Phan Thit l ra
 m 4 tp:
Tp 1: Cch anh ht vng, gn k  m
a tr n kt cng chc thuc h
t
1
mn). Ti 181.
nhit hunh quang thch anh (mu VN#14).
Tch anh ht vng, gn kt yu, cu to dp
ngang, ph c tin 3m.
Tch anh ht va  n kt yu, ranh gii tp 3
chuyn tip t tn 3m.
Tch anh ht t nh n va pha b, gn k
chuyn tip t t, phi ca ttui 73.900 
t hunh quang thch anh (mu VN#15)
Trong mt cp trp 1(tp 1), nhp 2(g
S c ca nhp 2 ph i c
thc thng.
Mặt cắt 2,  ven bi 
ca h tng Phan Thit b c tt ct t m 7 tp:
Tp 1 (0ch anh ht v, gn ku t
t b o lc cnh ghim
 (?)  13m.
Tp 2 (13ch anh ht va mau trng loang l, gn kcu to

Tp 3 (16ch anh ht va xen ht lng, gn ku
tp ngang, trn b mt cha nhiu v
Tp 4 (18ch anh ht nh, gn ku to khi xen cu t
 mt tp tectit dng m.
Tp 5 (25ch anh ht nh - va ln ln b  sm, cu to

khi, phu tp ngang m, trn kt qu x 
m  ht (P.24386/10) cho thy t l ph p hm 100%.
Tr n lc tt, h s chn lc S
0
=1,54, tr ng y 
t v th ng   hnh 
ch  thng lc trn, nh. H s bi xng Sk=1,26  ht v
b tp trung v p ht nh. T l n ht vn (trong cp ht >0,1mm): thch anh
t nng 1,5%; mn khot theo
kt qu ch anh 60%, felspat 20%, kaolinit 5%, hydromica 10%, goetit
n tr nh. H s nhn d
 s o  ng ven bin. Kt
qu n (P.24386/10): SiO
2
= 90,82%; TiO
2
= 0,27%; Al
2
O
3
= 3,79%,
Fe
2
O
3
= 2%, FeO = 0%; MnO = 0,02%; MgO = 0,09%; CaO = 0,24%; Na
2
O = 0,15%; K
2
O =

0,75%; P
2
O
5
= 0,04%. Kt qu n cho hp phn <0,1mm (chim 9,8%
trng mu) ca m
2
= 53,28%; TiO
2
= 1,48%; Al
2
O
3
= 24.47%,
Fe
2
O
3
= 8,25%, FeO = 0%; MnO = 0,06%; MgO = 0,61%; CaO = 0,72%; Na
2
O = 0,1%; K
2
O
= 1,92%; P
2
O
5
= 0,08%. Kt qu y Al
2
O

3
, Fe
2
O
3
, CaO,
MgO tp trung ch yu trong hp ph
Tp 6 (t 55ch anh ht va  l, phi cu to
 p ngang, ph n cu t     a nhi   c
12mm. Tr ng ch
Tp 7 (t 70ch anh ht nh - v, cu to khi,
trn b mc 5t. S t
cung tri trong ch
ng l
 t ct v   i t
loang l chuy  mt ho sng nhng vi 4
nhp trp 1 (gm tp 1), nhp 2( gp 3 (gm t
nhp 4 (tt trong mt c
 b v y trong ch  ng lc
mnh c
Mặt cắt 3, ttra h tng l ra din nh 
bin, ph gm 4 tp t 
Tch anh ht vng, loang l n kt truu to
dng khi, b xc rt d d. Kt qu x u
 ht cho thy t l p hm 100%. Trn l
h s chn lc S
0
= 1,651,8; tr   ng tru s Cv = 12
t vn Md=0,2 th   hnh
 ch  thng lc trn, nh. H s bi xng Sk = 0,921,17, trung

 ht v i xng. T l n ht vn (trong cp ht > 0,1mm):
thch anh 6369%; felspat 11t nng 12%, mn
 t theo kt qu     ch anh 60%, felspat 10%,
kaolinit 15%, hydromica 10%, goethit 5%. H s nhn dng Re = 2,51
 o  ng ven bin. Kt qu 
phn (mu P.24601/18): SiO
2
= 87,86%; TiO
2
= 0,37%; Al
2
O
3
= 6,63%, Fe
2
O
3
= 1,18%, FeO
= 0%; MnO = 0,01%; MgO = 0,04%; CaO = 0,12%; Na
2
O = 0,05%; K
2
O = 1,5%; P
2
O
5
=
0,04%.
T c h 
T ch anh ht va ln b  , loang l , cu to khi.

n tru ng vng ki (?). Kt qu
x  ht cho thp hm 100%. Trn lc tt, h
s chn lc S
0
= 1,491,66, h s Cv = 9,47t vn Md =
0,19 th ng cong   hnh: ch  thng lc trm
n, nh. H s bi xng Sk = 0,77t v
i xng. T l n ht vn (trong cp ht>0,1mm): thch anh 66
72%, felspat 312%    t nng 1   
0       t theo kt qu   
(P.24601/5): thch anh 60%; felspat 15%, kaolinit 5%, hydromica 15%; goethit 5%. H s
nhn dng Re = 2,54 o  
ng ven bin. Kt qu n (mu P.24601/9): SiO
2
= 84,3%; TiO
2
=
0,46%, Al
2
O
3
= 8,21%; Fe
2
O
3
= 2,59%; FeO = 0%, MnO = 0,03%; MgO = 0,04%; CaO =
0,12%; Na
2
O = 0,05%, K
2

O = 1,05%, P
2
O
5
= 0,02%. Kt qu n cho
hp phn <0,1mm ca mu P.24601/5 SiO
2
= 51,5%; TiO
2
= 0,55%, Al
2
O
3
= 29,79%; Fe
2
O
3
= 4,24%; FeO = 0%, MnO = 0,02%; MgO = 0,26%; CaO = 0,97%; Na
2
O = 0,37%, K
2
O =
1,6%, P
2
O
5
= 0,08%. Kt qu  
2
O
3

, Fe
2
O
3
,
CaO, MgO, Na
2
O tp trung ch yu trong hp phn <0,1mm.
T o nh r
Tch anh ht va pha b, gn ku to khi, phn 
cha nhiu sn laterit, mt b nh to nhng k 
sm, rn chc. Kt qu x  ht cho thy t l php ht: sn
0100%. Trn l s chn lc S
0
= 1,621,93; trm
      s Cv = 11,1     t vn Md =
0,21 th   hng 1nh: ch  thng lc
tr n. H s bi xng Sk = 0,83 ht
v i xng. T l n ht vn (trong cp ht >0,1mm): thch anh 5481%,
t nng 2
m s nhn dnng Re = 2,21
s o  ng ven bin. Trong ty 1 v c bin

Tch anh ht vn bn k
u sc. Kt qu x  ht (P.22204/2) cho thy t l
php ht: st 3,5%. Trn l s
chn lc S
0
=2,1; tr s c trung bt
v th   hnh  ch  thng lc

trc tn. H s bi xng Sk = 0,88  ht v tp trung v
p ht ln. T l n ht vn (trong cp ht >0,1mm): thch anh 33,5%, felspat
t nng 0%, m s nhn d
s o  ng ven bi
Trong mt c p trp 1 (g nhp
2 (tp 4).
Khu vt, s c ca tr 
 khoan.
Mặt cắt 4 p theo l khoan LK.2B,  khu vn 052m),
n gm thch anh ht nh n trung  , ph bt chnh h t

2
lh) vn sa to bic ngt v
la [19]. B a h tng ti mt ct 52m.
Mắt cắt 5 p theo l khoan PT.1  khu vay Phan Thit. Trong mt ct l
 i v , 21
b, 39,5t
, 53 pha b ng ch ht
b sc ca h t 
hp vi s  p ht trt xut hin cp h
ng SiO
2
t 93,18% ,
 thng bt vn nh ng SiO
2
t
t qu x  ht tra l khoan
PT.1 cho thy t l php ht: s86,41%, bt 13,5723,95%.
Tr     t, h s   
0

= 0,470,75. H s chn l  
S
0
=1,772,00, h s bing mu Cv = 20,5524,33% - tr
s bi xng Sk=0,730,9  h tp trung v p ht lc trung
t vn Md=0,097 th ng cong   hng 3nh  ch
 thng lc trc tnh. T l n ht vn (trong cp ht
>0,1mm): thch anh chim 4476%, felspat 0,51,8%, hu ht b t
nng chim 0,51,2% ch y
amphibol, monazit, turmalin. T hn cung cp vt liu
trn felsic. Trong mt saphir vi
c nht theo kt qu t  ch anh
chim 5060%, felspat 510%, kaolinit 1020%, hydromica 510%, goethit-hematit 510%,
   p ht <0,1mm c      t ti 5055%,
t 10u x ng trong mt cng
) cho thy h s   i Kt=1,83,32, pH=8,829,18, Na
+
/Cl
-
= 4,5812,58 khng
ng bin c dng ph gng
Polypodiaceae, Euphorbiaceae, Blechnaceae, Pseudoschizeaceae, Fogaceae genindet.,
Quercus sp., vi s u PT.1/2.8m, PT.1/5,8m; PT.1/1 tng
Phan Thi       c m    i bi   
Coscinodiscaceae, Cyclotella, Stylorm, Thalassiosira, Kozlovii (PT.1/31/49,6 m   
nh).
Ở khu vực Bàu Trắng tng Phan Thit ph  tng
 n tui Pleistocen mun, thi mun ph . B 65m.
Mặt cắt 6: p theo l khoan LK.708, khu v 
gn 2 tp:

Tp 1 (58,9ch anh ht m
ph p granitoid phc h .
Tp 2 (6ch anh ht m. Tp b n tui
Pleistocen mun, thi mun (mQ
1
3b
) ph 
B a mt ct 59,8m.
y, h tng Phan Thio trn, ki
phn tr ng, t; s 
sc din ra chuyn tip t t. Ranh ginh, b c khng ch,
n vt cht m  liu v 
phn vt ch phn, to, tui tuyi. S n tr
thu theo c t, khu
vc Tuy Phong.
Đặc điểm thành phần vật chất chung của hệ tầng
Kt qu tha 19 mu tri dii Bc Phan Thit (PT.12,
i Nam Phan Thit (PT.1) trong s 171 mu x  ht tr ca h
tng cho tht vn Md = 0,0175mm. T l
ph   p ht: sn 0,0         
89,38% bt 0 10,6%. H s bing mu Cv = 7,1942,29%, trung
 th   hnh  ch
 thng lc phc tn nh. H s bi xn 1,25, trung 
87  ht v tp trung v p ht ln. T l tn ht vn: thch anh
42,8714%, felspat 0t nng 0,46
 tru t
a trch h tng Phan Thit phng bin,
ki  ng lt trong
tr  a h tng Phan Thit (m   kaolinit chim (5-20%); hydromica
chim (5-15%); thch anh chim (50-80%); felspat chim (5-20%); goethit-hematit chim 5-

. t trong hp phn <0,1mm (phm
11,7319,89% trng m  aolinit chim (15-60%); hydromica chim
(10-20%); thch anh chim (20-60%); felspat chim (5%); goethit chim 3-10%; gibsit 0-
10%. Kt qu x n ca 17 mng, 15 m
, 9 mu (hp phn < 0.1mm)  u (hp phn >
 ca tr tng Phan Thit cho thng SiO
2
gim t tr
 - ng Al
2
0
3
, MgO, CaO, Na
2
O,
K
2
O t  . D n thng Fe
2
O
3

(4,05-8,25%) 
2
O
3
(24,47-30,78%) tp trung ch yu trong cp ht <0.1mm. Theo kt
qu x a h tng Phn Thit
hoc vng rt nh  zan (Cr<0,001%,
Co<0,001% ). T l Fe

2
O
3
/FeO rt ln cho tha h tu ng
cy, vi s tp trung ca Fe
2
O
3

2
O
3
trong cp
ht <0, xut hin c 
gibsit, goethit,  nhu cch anh
u kin c a khu
vc ngc mrc tip t ca
 ng c c ngc m
Fe(OH)
2
   ng tr Fe (OH)
2
+
O
2
(Fe
2
O
3
.nH

2
O (linomit)) t c 
nhic b b
n limonit (Fe
2
O
3
.nH
2
O) (Fe
2
O
3
) 
 u vang tn ti i dng si n tic khnh bi kt qu
chp n t soi ni, kt qu ng b ri cho thy, bao
t thp mng oxit st Fe
2
O
3
to  p v ng
sai lch kh  cu to ht vn. Lp v oxit s ty sch
ng c.
D hn vt ch 
a chu tui tuy  tng Phan Thic
xn gc trn, ti Pleistocen (m
b
Q
1
pt).

B a tr tng Phan Thii t 
 70m. Ch ng T 
t t
II.1.2. Chu kỳ trầm tích
 trong tr cp t m
ngun g  xen k t hp kiu ngun gm  tng
Phan Thi tr
a Jemchunicop  Botvikina ng tr chu k 
lun ch  m tr m ng tr
nhng sn phc lng 
Tr t  Vi tr [15]. Mi chu k c
ci mt phc h trn tin bu ng vi bi
k ng vi bin tin c xut hi
y gi  khi mc bit v p cho
t ti mc cao nha pi ca mi chu
k so v tr   ng m 
n ven b ng g
- m (mQ
1
1
o  cui thi k -Mindel.
y t  phn thp nht ca mt c
c c m 
- a  mun (mQ
1
2-3a
i thi k 
-Ris bao gm 2 nhp, yu t nh ph bi Phan Thit chng t 
2 lng ca mc bin. Nhu
m  t ch   

2
, CaCO
3
 d    n tinh.
 n nhiu si, cuc t 1-4
cm. Tui tuy       t hunh quang thch anh [11] cho >
m trong khong cui Pleistocen gia. Nhp th 2 g
i t i ng--t hunh
quang th  Su
- n (mQ
1
3b
o   40-
n ca  mun.   nht
y  i tuy
II.2. TƯỚNG TRÂM TÍCH
II.2.1. Tướng trầm tích
T sn phm vt t sinh
ngun gch th  thng lc ca
ng b. T h trnh l
ng tr   h   o tr    nh lng gn nhau 
chung ngun gc xng.
 trch hc, d hp cng sinh
ng bc thp (chu k bc I). Chu k bc cao (Chu k b lp li ca mt tp hp
 bc thp (Chu k bc ng va cht do 2 yu
t n khng ch n t ng m
trh tng Phan Thit c  trong chu k bc II vi 4 chu k bc I gm
nhiu thi k tho tr        ng  chu k, h
p thng lc  ng (u thch ht v
 c tranh tin tru theo

i k sau:
- Thi k m
- Thi k a
- Thi k n
- Thi k  mun  Holocen
Nhng tham s trnc ch 
- Md (nh ht vn   biu th t c
u th  thng lc cn chuyng
ng try, u hiu v n d c.
- Di (S   hng cong p  ht ca tr
 chun hoc chu i t 
ng thng lng nhn 3 hong thng
lc phc tn)
- Ro ( ng vn chuyng lng trm
i trong b tr
- Sf  cu) biu th t kt tinh c   
 u th ngun gc ca mi loi ht vn
T l pht vn biu th  cc ph
bng ch s thun thc (Matturity) ca Petijohn F.J., 1957,  a trm tt)
ca Trn Nghi (1991), h s nhn dng (Re) ca Nguyng (1991)
ng hp thch hc theo gi i trp phn (t l
php ht sn-sng bt-a Folk R.L., 1954.
Ngo dng t l Fe
2
O
3
c c bo tn ca
felspat vn, s xut hin c trong tr 
c, mi quan h gia chu k tr ng ca m, c sinh,
t c , du hi bin lun mi quan

h gia c  m trng.
 v n vt cht ca tr tng Phan Thit: Md=0,175mm;
Sa=89,4%; Mu=10,6%; Q=81,89%, Fs=1,67%, L=0,06%, t s Al
2
O
3
/Na
2
O rt ln; D
nh  ch  thng lc phc t try trm
c long bin, kiu to.
 c mi bin ven b Coscinodiscaceae, Cyclorella,
Stylorum, Thalassiosira, Kozlovii; h s n kt lun
t trong tra h tng Phan Thit g
   -       s
Fe
2
O
3
/FeO=1,438/0,124, felspat hu ht b c chim
  thng tr
thung ki
nh ven b n thch hc
gm: Gr=3,04%, Sa=76,45%, Mu=20,51%, Q=62,36%, Fs=4,71%, L=1,06%. S  
 gian cc ki
ch yu mnh m
ng bt  
C a thi k t hit bin tia n thoi, cung
b ng gi ng
n vt lic

thi k n tu t u kin c
  to h th lagoon ven bn tic chuyn ti theo
n t thm l  tri t 
khng l gng g n ty chn
n theo c chiu ru cao. Khong gi
lagoon  
lagoon i nhau bch triu.
II.2.2. Màu sắc của trầm tích
t ct ca h tng Phan Thi ghi nha
h tng gm 4 nhp trng vp tr i  c
t tr.  try c tng Phan
Thi    th sinh, gn lin v
 ct bin tin trong thi k   s
 ca c thuc h tng Phan Thing trang s ghi l nhng
s kia cht dii k  ng mu kin c
u, hon to.  sc c h tng y ra rt nhiu tranh lun
v bn ch to  do thiu nhu v n vt cht m
h th sc c o, lch s n
a chu kin c u  hiu ni bn cho   ca
 ct qu cng
thi:
-  gin tin
-  di thoi
- c ngc mt
- C i
C n to ra   c h tng Phan
Thit 
+ Bii k ng vn
tt lint h
c th tr x

o trong pha bin tia
b chia cc,  cao va tt v ng sut
 ngp bin tr li.
+  a min tn
n tin tr lt kii thga  
ch  hin nay  
Thit qu cn to mnh m  t  cao
ng vi thm   ng ngu
ng .
Da  i tuy c t n to theo
c sau:

T
hh
H
o



 cao bc thm thu chnh);
 cao tuyi hin ti
o
h
o
 cao mc bi
Kt qu cho thy t  T  Phan Thi 
Theo quy lu  c ln
  m
l nh tui c m 100m  t hin nhin
-150m. Nhng th trc tho tr nh

c tu
+ c ngc mc tip t c
c ngc
t keo st Fe(OH)
2
ng
  khc ngm h th 
ng tr Fe(OH)
2
+ O
2

2
O
3
.nH
2
O, v sc b
n dn s  n Fe
2+
 tr 

3+
c mng th i
vi vic mang ngun Fe
2+
n.   ngp l
c mc ngc mt
y tm thn chuyn Fe
2+

c mt,

2+

3+
  c ngm.
+ C u t c quan trng song c  
i cc tic nh  Vi
t c   c
c trong keo st (Fe
2
O
3
.nH
2
O) thng trong cp h
st bt thch anh b b 
ri  limonit 
Fe
2
O
3
.nH
2
O) bin 
2
O
3
 u vang tn ti dt
 ng si n tinh (bng II.       a nhn vi nhau r 

y ci Pleistocen Phan Thi a ch
b li gn lin v sinh.

Chương III
ĐIỀU KIỆN THÀNH TẠO VÀ ĐÁNH GIÁ TRIỂN VỌNG KHOÁNG
SẢN

III.1. ĐIỀU KIỆN THÀNH TẠO
 phc tu song nhn thc v
thng nht bi l m ngun g n hiu
sai v  sc, gi  li theo nh
  ng thng lch s tic th  ,
i tip cn t :
- n vt ch.
- T hp cng
III.1.1. Thành phần vật chất và quy luật phân bố
n trng thng l  vi nhau, trong
 ht vng quy
u hin nhn bing tin cy nh sau
n c ng bing lng mnh:
- ng thch anh chi
-  chn lc t
-  
- t vn v 
- p ngang song song hon
- Cha cuch anh chn lc tt.
i chiu vi nhng tham s  Phan Thi  x
ng thch anh chim t 92-98%, h s ng t 1,3-1,8 h s
 0,45-0,7. Vn v c ln 1-4 cm gp rt nhiu tr
  

p trong t Q
1
2-3a
  (b xut hin nhii
c 4-6cm     cao 70m i
c 1-4 cm   , t tt  Sui
ng bng ch ng tr cui b
chung mng mnh c.  i tc ly t mnh v tectit sc
cnh cn b m Pleistocen sm tri qua vn chuy
n sau.
III.1.2. Tổ hợp cộng sinh tướng
  Phan Thic s n ven b t
i
tr li vn v o t hp c 
lagoon vlagoon a mt pha bin ti hp
ca ven bin min Trung Viu ta cht
 bin trc din v
u t y b chn lc vt liu, vu t chuyn
tc d y t     khi bi  ri t
nhng l  n t
by chrin c chiu rc bi
ng thlagoon  i bin qua mt ca lch
u hin tr y d 
   nh Phan
Thit s lch triu b cht, lagoon n tuyt vi bi
Trng. T hp c lagoon  c minh ha bng hay mt c
biu:
a. Mặt cắt ở Mương Mán
- t) rng t 5-10km, cao 100m gt
ci cao kii tng.   h ng ph 

i t Q
1
1
n Q
1
2-3
- Lagoon  ng b t m
ng bn bao gm cui sng aluvi-proluvi b ph bi trt
nh.
b. Mặt cắt ở Sông Lũy
-  tng t 10-20km chy t 
Trn Thi c phi 160m.
- lagoon c ly tri sn (ti) tui N
2
-
Q
1
1
a Pleistocen mun ha lch

Git lagoon ng) n t Q
1
1
n Q
1
3b

b lp cn tuyt vi bin ri dn dn bit h c ng 
ng Hi, Qu
III.2. ĐÁNH GIÁ TRIỂN VỌNG KHOÁNG SẢN

Qua kt qu thu thng h Phan
Thit ln v ng t nng binh
theo chiu r. Bi v  
 Phan Thit, la cha ch
III.2.1. Công thức tính tài nguyên
    a cht,   t  t n    

Q = V*d*C = S*m*d*C (tn)

- t n
zircon + monazit).
- V: th  
3
.
- S: div 
2
.
- m: chia kh 
- d: th trng qu n/m
3
).
- t n
III.2.2. Các thông số tính tài nguyên
- Diện tích (S)
Ranh gii kh       c bao b  ng thng, to
i
thc hin trc ting phn m 
2
.
- Chiều dày (m)

+ Ching ching 
p k
nu trong 1 kht n
trong khong t ng
c ch ng hi b 
ng t thn cao trong 1 s  t: loi b ng thp 
phn cun phn gin ph
t nt 0,45%. Ching theo
 :



n
i
mm
1

Trong 
- m
i
: Chiu th i (i = 1 - n).
- n: S ng mt ch  mng
th
- i = 1, 2, 3, , n.
+ Chia khc c
 hc:

 - m
i
: Ching   i.

- n: S 
- i = 1, 2, 3, , n.
- Hàm lượng
Do chiy mu troni, ching  
 t n
ng zircon ho
n:




n
i
n
ii
m
mC
C
1
1

: - C
i
t na m i.
- n s ng mu c 
- m chi

- i = 1, 2, 3, , n.
- Thể trọng quặng
T kt qu u th trng nh t qu 

din, th trng qu c ly theo ch  trng  tra
kt qu  trng t hc th tr
cu l
III.2.3. Kết quả dự tính và dự báo tài nguyên
- Tài nguyên dự tính đối với tổng khoáng vật nặng có ích là 337.795.549 tấn.
- Tài nguyên dự báo đối với tổng khoáng vật nặng có ích là 220.151.432 tấn.
- Tổng tài nguyên dự tính và dự báo đối với khoáng vật nặng có ích là 557.946.981 tấn.


KẾT LUẬN

 Phan Thit hia ch T a Vi
th ging bing cnh
th hi s ng: thn lc t  tn
trunp mn, cha v i bin.
m
m
n
i
i
n



1
c th   o trong 3 pha bin tin
ng vi 3 chu l 
- Gunz-Mindel (Q
1
1

)
- Mindel  Ris (Q
1
2-3a

- Ris  Wurm (Q
1
3b
).
tt phc h  ven b c k m 3 chu k trt ph ch
Mi chu k tru phn tr to mt b
m 
c.
 ct ch v 
ha Phan Thi n hay 3 chu k to v ng vi 3
chu k i Q
1
1
u Q
1
2
), Ris (cui Q
1
2
u Q
1
3a
), i Q
1
3b

u Q
2

c n s mc tri ca Fe
2
O
3
.nH
2
O bi  u
u ki T 3 v   i 3 bc th
 v. Nm kp gia th  
lagoon, ting bng hin ti.
V ngun gc c  o u   khnh v
xut x ca nhng ngung l t ln chuyn phi do
nhng h thy tm thi  min Trung Vii tr c cg.
Tng b c ra thm ln ti mt
ng l y ven b   bc xu nn
Nam Trung B t  r ng ph i
mt khng ln chun b n ti  
ng felspat t 2-ng b   8- u ht vn
thn gc bin cht (quazit) sc cnh ch Phan Thi
n vc Trung B thn lt, h
cha bt him gp felspat.
ng t ngun vt liu cung c mt phn   
n Nam Trung Bu Long.
C     Phan Thi    t ln v     
t nng binh theo chiu r. Kt qu 
 557.946.981 tn.
Cn tip tu ngun gc, lch s  ca

  sa kho  n ven b    n vng sa




References
1. Lê Đức An, 1978. Nhn mi v 
ca cht  a m t Nam.
2. Đào Thanh Bình, Phạm Văn Hát, 1983.   a cht kt qu m t m
- Thun H a cht.
3. Nguyễn Thanh Bình, 1988.   t qu       m  
ilmenit - - Thun H a cht.
4. Nguyễn Biểu và n.n.k, 1995. a chn ven b (0 - 30n
c) mi-  a cht.
5. Nguyễn Xuân Bao và n.n.k, 1996. t minh b a cht hi l
1:200.000 lot t Bn Kh -  a cht
6. Nguyễn Văn Cường và n.n.k. t qu  b a chm
 -  a cht.
7. Fontaine H., 1972. Nh      t Mi  i Nam trung b.
Arch. Geol Viet Nam, N-15. Bn dch ca Nguyn Anh Tun.
8. Nguyễn Kim Hoàn và n.n.k, 1985. a chn vn
titan sa n Vi a cht.
9. Đinh Thanh Hoàng, 2010.  --
Sun a cht.
10. Trương Công Hữu, 1996. t qu a cht b sung khu m 
- -  a cht.
11. Trần Nghi, Nguyễn Biểu, Bùi Công Quế, 1996. Quy lu n trong
tr t  Vit Nam. Tạp chí địa chất, A/237:18-24, Hà Nội.
12. Trần Nghi, Nguyễn Địch Dỹ, Đinh Văn Thuận, Vũ Văn Vĩnh, Ma Kông Cọ, Trịnh
Nguyên Tính, 1998.   Phan Thit. Tạp chí địa chất,

A/245 : 10-20. Hà Nội.
13. Trần Nghi, 2003. Trt bi hc Qui
14. Trần Nghi, 2005. Trxut bi hc Qui
15. Trần Nghi, 2010. Tra cht bit bi hc
Qui.
16. Hoàng Phương và n.n.k, 1997. t qu   b  a ch  m
 Phan Thit.  a cht.
17. Trần Văn Thảo, 2008.     n v   n t
a -  a cht.
18. Nguyễn Viết Thắm, 1984. t qu n v
n t n V a cht.
19. Nguyễn Đức Thắng và n.n.k, 1988. p b a chm
 Bn Kh - ng Nai t l  a cht.
20. Đào Mạnh Tiến và n.n.k, 2005.     
- 
