内蒙古哈什吐钼矿床熔融-流体包裹体特征及硫同位素组成

翟德高; 刘家军; 王建平; 杨永强; 刘星旺; 王功文; 柳振江; 王喜龙; 张琪彬

doi:10.3799/dqkx.2012.136

Volume 37 Issue 6

Jun. 2012

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Article Navigation > Earth Science > 2012 > 37(6): 1279-1290

ZHAI De-gao, LIU Jia-jun, WANG Jian-ping, YANG Yong-qiang, LIU Xing-wang, WANG Gong-wen, LIU Zhen-jiang, WANG Xi-long, ZHANG Qi-bin, 2012. Characteristics of Melt-Fluid Inclusions and Sulfur Isotopic Compositions of the Hashitu Molybdenum Deposit, Inner Mongolia. Earth Science, 37(6): 1279-1290. doi: 10.3799/dqkx.2012.136

Citation:

ZHAI De-gao, LIU Jia-jun, WANG Jian-ping, YANG Yong-qiang, LIU Xing-wang, WANG Gong-wen, LIU Zhen-jiang, WANG Xi-long, ZHANG Qi-bin, 2012. Characteristics of Melt-Fluid Inclusions and Sulfur Isotopic Compositions of the Hashitu Molybdenum Deposit, Inner Mongolia. Earth Science, 37(6): 1279-1290. doi: 10.3799/dqkx.2012.136

Citation:

ZHAI De-gao, LIU Jia-jun, WANG Jian-ping, YANG Yong-qiang, LIU Xing-wang, WANG Gong-wen, LIU Zhen-jiang, WANG Xi-long, ZHANG Qi-bin, 2012. Characteristics of Melt-Fluid Inclusions and Sulfur Isotopic Compositions of the Hashitu Molybdenum Deposit, Inner Mongolia. Earth Science, 37(6): 1279-1290. doi: 10.3799/dqkx.2012.136

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Characteristics of Melt-Fluid Inclusions and Sulfur Isotopic Compositions of the Hashitu Molybdenum Deposit, Inner Mongolia

doi: 10.3799/dqkx.2012.136

State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China

Received Date: 2012-07-19
Available Online: 2021-11-09
Publish Date: 2012-06-15

Abstract

Abstract

The Hashitu Mo deposit was discovered recently in the middle section of the Da Hinggan Montain district. The ore body occurs in granite intrusion and this deposit is regarded as an endogenic metallic ore deposit related to acid magmatism. The metallic minerals are composed of molybdenite,chalcopyrite,pyrite,sphalerite,galena,and arsenopyrite,etc. The fluid inclusions study demonstrates that inclusion types mainly involve liquid inclusion (Ia type),gaseous inclusion (Ib type),daughter crystal inclusion (Ic type) and melt inclusion (II type). Co-existence of different inclusion types indicates the fluid boiling. The heating and freezing study shows that homogenization temperature of fluid and melt inclusions ranges 250~500 ℃ and 750~950 ℃,respectively. The calculation of fluid salinity,pressure and density indicates that these values range 1%~49% NaCl eqv,5~100 MPa and 0.7~1.1 g/cm³,respectively. The fluid inclusion study indicates that ore forming fluid are characterized by high temperature,high salinity,high pressure,high-moderate density and CO₂ bearing,which can be classified as H₂O-NaCl-CO₂-SO₄^2- system. δ³⁴Sv-cdt(‰) values of sulfides and δ³⁴S_H₂S(‰) values of ore forming fluid range from 0.4‰ to 3.8‰ and 1.1‰ to 4.7‰,respectively. These isotopic values indicate that mineralization is related with magmatism in this region. Both fluid boiling and mixing are identified in ore forming fluid evolution and fluid boiling resulting in pressure decrease was the mainly mechanism for sulfide minerals deposition form hydrothermal fluid. Discovery of the Hashitu Mo deposit in this region is helpful to the exploration of other magmatic-hydrothermal Mo-W-Cu-Pb-Zn-Au deposits. More attention should be paid to the contact and intersection parts between intrusions and other host rocks,intrusions and structural zones in future mining exploration.
- melt-fluid inclusions,
- sulfur isotope,
- molybdenum deposit,
- Hashitu,
- ore prospecting,
- ore deposits.

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References(45)

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