西藏普兰县姜叶马豆荚状铬铁矿地质特征及找矿前景

2006 Geology and M ineral Resources of South China3
: 1007 - 3701 (2006) 03 - 0055 - 06
,,,
(, 443003)
:,
,,
,
:;; ;;
: P618. 33: A
,,
,,OPX,
,15%
:80 4680
54 ,30 463073% ,
50
1
(1)
1. 1
750 km 2 (1987,)
,
(N
() :
2 z)
,( K - A r
(1):4% ,
)98. 3 Ma,
1. 2
(2): 13% ,
,
,,
,
,
,,2070
: 2006 - 05 - 30
:
(1212010530108).
:( 1965) ,,,
.
(3):,
,
(4)- :
10% ,
,() ()
,NE,50
60NW NEE
() ,
,,

56
2006
1
Fig. 1Geological sketch map of the Laangcuo body, Pulan Country
,1 2,
,2 km5 km,
,,,
, NW , NEE(1)
, 2. 2
,
2
12,8, 7. 26% , 0. 0061% , 0. 0045% ; Cr 2 O 3 /FeO =
32 ()8 3. 63
km2 km,NE; Cr2,;
,60 m15 m60% 80% ,SiO 2 , S, P
(2)
2. 1()
(),
(Cr 2 O 3 32% )
,80% 90% ,
95% ,40. 98%
SiO 2 , S, P,
5,( 10% Cr 2 O 3 < 32% ),
,
- -
5()
,,,
,, Cr 2
( ZK601) 5. 877. 98 m ,
,
2. 11 m() - - - -

3
:
57
2
Fig. 2Geological sketch map of the J iangyema chrom ite m ine area, Pulan Country
- (O s, Ir, Ru, Rh, Pt,
Pd)167. 76364. 59 10 - 9 ,Cr1 ,
5 526 10 - 9 ,,3001200 m;
()
3
,500800 m;
- ,,
,
3. 1
,
,
,-
( 10% ),
300700 m;-
(1015% ),
; ,
,
[ 1 ] :,
, 100200 m;-
[ 1 ] , ,400500 m;
,,,200300m

58
2006
1()
Table 1Geolog ica l character istics of the ore bod ies in J iangyema chrom ite deposit
(m) (m) Cr 2 O 3 (w B /10 - 2 )
Cr1 - 1 10. 60 1. 00 60 /50 42. 72
Cr1 - 2 4. 20 0. 50 310 44. 81
Cr2 - 1 1. 65 1. 30 320 /50 ,28. 4240. 85
Cr2 - 2 6. 90 5. 50 60 ,47. 7551. 51
Cr2 - 3 7. 60 5. 10 345 ,38. 4051. 96
Cr2 - 4 3. 10 0. 70 110 51. 1851. 65
Cr2 - 5 3. 40 0. 080. 40 220 /68 49. 99
Cr3 - 1 5. 20 1. 10 295 /90 45. 38
Cr3 - 2 2. 20 0. 60 310 53. 44
Cr4 2. 40 0. 50 305 / sw 45. 21
Cr5 2. 30 0. 60 30 42. 24
Cr6 8. 00 0. 60 75 36. 9741. 15
Cr7 2. 00 0. 30 340 11. 60
Cr8 4. 20 1. 60 165 ,17. 1639. 48
Cr9 6. 00 0. 70 128 ,31. 0336. 19
Cr10 5. 00 0. 20 30 50. 72
Cr11 6. 00 1. 50 115 19. 21
Cr12 4. 00 1. 50 170 /28 21. 80
Cr13 5. 00 0. 09 92
, 49. 02
Cr14 - 1 1. 40 0. 90 240 , 42. 90
Cr14 - 2 1. 20 0. 20 , 44. 24
Cr15 2. 00 0. 60 10 49. 76
Cr16 - 1 1. 00 0. 50 140 45. 85
Cr16 - 2 0. 80 0. 30
Cr17 0. 60 0. 05 20
Cr18 1. 20 0. 20 SN 42. 12
Cr19 0. 50 0. 08 110 39. 25
Cr20 24m 2 , 51. 18
Cr2 ( ZK601) 2. 11 ,18. 1137. 52
:, 2004, 2005

3
:
59
,,
,
3. 2 4. 1
()
, (Cr’60)(Cr’> 60)
[ 1 ] :
:(
),
;- :
,,
;,Mg[Mg
=
; 100Mg/ (Mg + Fe 2 +
) ] Cr ’[ Cr=
- ,- 100Cr/ (Cr + A l) ],FeO, A l 2 O 3
;,
,
(3)
,Cr’
3
(, 1999,) [ 1 ]
Fig. 3The sketch map showing the columnar section of the
m inerogenic position among the Laangcuo, Luobusha
and Dongqiao bodies
1. ; 2. ; 3. ; 4. ; 5.
; 6. ; 7. ; 8.
; 9. - ; 10. ; 11.
; 121
4
7080,;
MgO (41. 98% )
( 42. 74% ) ( 44. 21% );
A l 2 O 3 (1. 40% )
(1. 26% ) ( 0. 95% );
,
4. 2
:
,,
,;,
,,,
,
(Cr11 Cr12,
2) ,( Cr11
19. 21% Cr1221. 80% ) ,(
) ,350,
,,
Cr11Cr12
,,
,12,
,

60
2006
,:
[ 24 ] , [ 1 ],,,. [M ].
:, 1999. 145146, 297306.
,
[ 2 ].
,,
[ J ]. , 1996, 9 (4) : 452.
[ 3 ],,.
,,
[ J ]. , 1996, 1: 6364.
,
[ 4 ]. [ J ].
, , 1996, 1: 94105.
,
Prospect for the J iangyema Podiform Chrom ite Deposit and its
Golog ica l Character istics in Pulan Country, Tibet
LE I Yi2jun , HUANG Guei2cheng , X IDe2m ing , L IL i2juan
( Yichang institute of Geology and M ineral Resources , Yichang , 443003 , Hubei , China )
Abstract: J iangyema chrom ite deposit lies in the Laangcuo rock body of which locates in the western
Yaluzangbujiang ultramafic rock belt. It is a sort of the Cr2rich podiform chrom ite deposit. This article mostly
discuss p rospect for the J iangyema podiform chrom ite deposit and its gological characteristics in Pulan Country,
Tibet. According to the analysis of the rockfacies characteristics of Laangcuo rock body, investigated podiform
chrom ite belt and ore spots of which have been discovered in J iangyema chrom ite m ine area, compared with
chrom ite deposits of Luobusha and Dongqiao in Tibet. In this paper summarized the rule of the ore bodies distri2
bution and their occurrence. This area exists geological condition for form ing podiform deposits on large scale
and rep resents good p rospecting potentiality.
Key words: podiform chrom ite deposit ; geological characteristics ; rule of the ore bodies occurrence ;
p rospecting potentiality ; J iangyema