Hydrogen-Oxygen-Sulfur Isotope Composition of Shihoushan Pyrite and Tungsten Polymetallic Deposit, Southern Jiangxi

Wei LI; Chang-qi YU; Zai-lin ZENG; Cui-hui LIU; Gen-wen HE; Wei CHEN; Si-tao WU

doi:10.15898/j.cnki.11-2131/td.201712210197

2018 Vol. 37, No. 6

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Article navigation > Rock and Mineral Analysis > 2018 > 37(6): 713-720

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Wei LI, Chang-qi YU, Zai-lin ZENG, Cui-hui LIU, Gen-wen HE, Wei CHEN, Si-tao WU. Hydrogen-Oxygen-Sulfur Isotope Composition of Shihoushan Pyrite and Tungsten Polymetallic Deposit, Southern Jiangxi[J]. Rock and Mineral Analysis, 2018, 37(6): 713-720. doi: 10.15898/j.cnki.11-2131/td.201712210197

Citation:

Wei LI, Chang-qi YU, Zai-lin ZENG, Cui-hui LIU, Gen-wen HE, Wei CHEN, Si-tao WU. Hydrogen-Oxygen-Sulfur Isotope Composition of Shihoushan Pyrite and Tungsten Polymetallic Deposit, Southern Jiangxi[J]. Rock and Mineral Analysis, 2018, 37(6): 713-720. doi: 10.15898/j.cnki.11-2131/td.201712210197

Hydrogen-Oxygen-Sulfur Isotope Composition of Shihoushan Pyrite and Tungsten Polymetallic Deposit, Southern Jiangxi

Geological Survey Team of Gannan, Bureau of Geology and Mineral Exploration & Development of Jiangxi Province, Ganzhou 341000, China

Received Date: 21 December 2017

Revised Date: 10 April 2018

Accepted Date: 06 July 2018

Abstract

Abstract

BACKGROUNDShihoushan Pyrite and Tungsten polymetallic deposit, located in the northern of Yinkeng-Qingtang Au-Ag polymetallic integrated exploration area, is the only large pyrite deposit in southern Jiangxi. The pyrrhotite-pyrite (-chalcopyrite-scheelite) orebody hosts in calciferous sandstone in the Zishan Formation of Carboniferous System, mainly formed in the quartz-sulfide stage. OBJECTIVESIn order to better understand the ore-forming material source and the evolution processes of Shihoushan deposit, the primary ores were selected as laboratory raw materials for stable isotope testing. METHODSH-O-S isotope composition of primary ore minerals was analyzed combined with the Pb isotope and metallogenic age results. The ore-forming fluid source and ore-forming evolution process are discussed. RESULTSThe δ³⁴S values range from -5.50‰ to -0.20‰, which are mainly concentrated at -3.0‰-0.0‰ (n=11), show the typical signature of mantle S. The wide range of variation indicates that the ore-forming fluid has been subjected to superposition and modification. H-O isotope analyses show that δD=-74.4‰--48.0‰ (n=9), δ¹⁸O_H₂O=3.76‰-10.86‰ (n=9), indicating that the ore-forming fluid is composed mainly of magmatic water and metamorphic water, with minor meteoric water. CONCLUSIONSAccording to the comprehensive analysis, the ore-forming fluid of this deposit mainly comes from deep magmatic water. The contact between magmatic hydrothermal fluid and calcium-bearing strata forms a large-scale metamorphic fluid, mixed with a small amount of meteoric water. The fluid immiscibility makes the ore-forming materials precipitate in the contact between the rock mass and the calcium-bearing strata, forming a hydrothermal filling and metasomatic deposit.
- pyrite and tungsten polymetallic deposit /
- H-O-S isotopes /
- source of ore-forming fluid /
- post-magmatic hydrothermal filling and metasomatic deposit /
- Southern Jiangxi

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