Metallogenic epoch and ore-forming material source of the Tongshanling Pb-Zn polymetallic deposit in southeastern Hu'nan Province:Evidence from Sm-Nd isochron age and Pb isotope

WANG Yunfeng; YANG Hongmei; ZHANG Liguo; LU Shansong; YANG Zefei; QIU Xiaofei; LIU Zhongpeng

2017 Vol. 36, No. 5

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WANG Yunfeng, YANG Hongmei, ZHANG Liguo, LU Shansong, YANG Zefei, QIU Xiaofei, LIU Zhongpeng. Metallogenic epoch and ore-forming material source of the Tongshanling Pb-Zn polymetallic deposit in southeastern Hu'nan Province:Evidence from Sm-Nd isochron age and Pb isotope[J]. Geological Bulletin of China, 2017, 36(5): 875-884.

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WANG Yunfeng, YANG Hongmei, ZHANG Liguo, LU Shansong, YANG Zefei, QIU Xiaofei, LIU Zhongpeng. Metallogenic epoch and ore-forming material source of the Tongshanling Pb-Zn polymetallic deposit in southeastern Hu'nan Province:Evidence from Sm-Nd isochron age and Pb isotope[J]. Geological Bulletin of China, 2017, 36(5): 875-884.

Metallogenic epoch and ore-forming material source of the Tongshanling Pb-Zn polymetallic deposit in southeastern Hu'nan Province:Evidence from Sm-Nd isochron age and Pb isotope

1.
China University of Geosciences, Beijing 100083, China
2.
Chinese Academy of Geological Sciences, Beijing 100037, China
3.
Isotope Geochemistry Lab, Wuhan Center of Geological Survey, CGS, Wuhan 430205, Hubei, China
4.
Research Center of Petrogenesis and Mineralization of Granitoid Rock, CGS, Wuhan 430205, Hubei, China

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Corresponding author: YANG Hongmei, ycyanghmei@163.com

Received Date: 03 April 2016

Revised Date: 12 August 2016

Publish Date: 25 May 2017

Abstract

Abstract

The Tongshanling Pb-Zn polymetallic deposit is located in the collage part between the southern Hu'nan-northeastern Guangxi depression in the Yangtze Block and the northern Guangdong depression in the Cathaysia Block.It is one of the representa-tive deposits in the Nanling metallogenic province.In order to determine the metallogenic epoch of the Tongshanling Pb-Zn polymetallic deposit, the authors analyzed garnets in mineralized skarn from the deposit using Sm-Nd isotopic system and obtained an isochron age of 173±3Ma which corresponds to early Yanshanian.The metal sulfides were analyzed using Pb isotope compositions and their average ratios of ²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb, ²⁰⁸Pb/²⁰⁴Pb are 18.602, 15.701 and 38.729, respectively, indicating that they were mainly derived from relatively uranium lead-enriched and slightly thorium lead-defected upper crust.According to analyzing the dia-gram of (²⁰⁷Pb/²⁰⁴Pb)_i-(²⁰⁶Pb/²⁰⁴Pb)_i, the hosted granodiorite seems to have been an important material source for the Tongshanling PbZn polymetallic deposit.In addition, ore-forming material probably contained mantle components hosted in the granodiorite of the Tongshanling Pb-Zn polymetallic deposit.
- Tongshanling Pb-Zn polymetallic deposit /
- metallogenic epoch /
- ore-forming material source /
- Sm-Nd isochron /
- Pb iso-tope composition

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