Sources of metallogenic materials of lead-zinc deposits in western Hu'nan Province:Evidence from S and Pb isotopes

CAO Liang; DUAN Qifa; PENG Sanguo; ZHOU Yun; LI Kun; GAN Jinmu

2017 Vol. 36, No. 5

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CAO Liang, DUAN Qifa, PENG Sanguo, ZHOU Yun, LI Kun, GAN Jinmu. Sources of metallogenic materials of lead-zinc deposits in western Hu'nan Province:Evidence from S and Pb isotopes[J]. Geological Bulletin of China, 2017, 36(5): 834-845.

Citation:

CAO Liang, DUAN Qifa, PENG Sanguo, ZHOU Yun, LI Kun, GAN Jinmu. Sources of metallogenic materials of lead-zinc deposits in western Hu'nan Province:Evidence from S and Pb isotopes[J]. Geological Bulletin of China, 2017, 36(5): 834-845.

Sources of metallogenic materials of lead-zinc deposits in western Hu'nan Province:Evidence from S and Pb isotopes

1.
Wuhan Center of Geological Survey, CGS, Wuhan 430205, Hubei, China
2.
Research Center for Petrogenesis and Mineralization of Granitoid Rocks, CGS, Wuhan 430205, Hubei, China

Received Date: 02 April 2016

Revised Date: 12 August 2016

Publish Date: 25 May 2017

Abstract

Abstract

Located in the southwest of the western Hubei to western Hu'nan metallogentic belt, lead-zinc deposits in western Hu'nan are expected to become the largest lead-zinc deposit basement, with good ore-forming geological background and ore-bear-ing conditions.In this paper, S-Pb isotope compositions of sulfide minerals separated from orebodies in the ore deposits were deter-mined so as to discuss the sources of ore-forming materials.Studies of sulfur and lead isotopic compositions show that the sulfur isoto-pic compositions δ³⁴S in orebodies in western Hu'nan Province are in a wide range of 6.3‰~34.66‰, 19.64‰ on average, with obvi-ous rich heavy sulfur and the characteristics of the distribution of the Twin Towers.Sulfur of the ore mainly came from the marine sul-fate in the ore-bearing formation and seawater.The ²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb and ²⁰⁸Pb/²⁰⁴Pb ratios for ore minerals from the eight depos-its are in the ranges of 17.689~18.295, 15.535~18.848 and 37.294~38.630 respectively.As for lead-zinc deposits in this area, lead isoto-pic composition has orogenic belt and upper crust Pb isotopic characteristics, sources of ore-forming materials were from the mixture of orogenic belt and upper crust, lead genetic types are the subduction lead resulting from mixture of upper crust and mantle magma-tism.The authors put forward the lead-zinc ore-forming model of two stages of evolution for deposits of western Hu'nan area.Leadzinc mineralization in the area went through two phases of evolution which included enrichment of ore-forming fluid and migration of ore-forming fluid.
- Pb-Zn deposits /
- sulfur isotope /
- lead isotope /
- metallogenic model /
- western Hu'nan Province

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