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Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: Their possible link to the supercontinent cycle
Xin-Fu Zhao;  Mei-Fu Zhou;  Jian-Wei Li;  Liang Qi
2013
Source PublicationMineralium Deposita
Volume48Issue:1Pages:129-136
Abstract

Giant sedimentary rock-hosted stratiform copper (SSC) deposits commonly occur in rift environments, temporally coincident with the breakup of the Rodinia and Pangea supercontinents. However, whether or not such deposits have also formed during the breakup of the Paleoproterozoic Columbia supercontinent is not well known. A group of dolostone-hosted Cu deposits in late Paleoproterozoic rift-related sedimentary sequences of the Dongchuan Group, South China, form one of the largest SSC districts in the world. Being one of the largest SSC deposits in the region, the Yinmin deposit has stratiform Cu orebodies intruded by dolerite dykes. One dyke has a SIMS zircon U–Pb age of 1,701±28 Ma, slightly younger than the orehosting strata with a zircon U–Pb age of 1,742±13 Ma for a tuff unit. Six chalcopyrite and bornite separates from stratiform orebodies contain highly radiogenic Os and extremely low common Os and yield a weighted mean Re–Os model age of 1,666±82 Ma and a 187Os–187Re errorchron age of 1,585±100 Ma. The present zircon U–Pb and sulfide Re–Os ages thus constrain the timing of the mineralization at ~1,700 Ma. The Yinmin deposit and, by inference, other SSC deposits in the region, arguably represent a large-scale SSC mineralization event during the late Paleoproterozoic. The formation of these deposits was coeval with the initial breakup/fragmentation of the Columbia supercontinent. This study highlights the temporal and likely genetic links between large-sized SSC deposits and the supercontinent cycle.

KeywordDongchuan-type Cu Deposit late Paleoproterozoic rift Basin south China supercontinent Cycle
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/11126
Collection矿床地球化学国家重点实验室
Affiliation1.Department of Earth Sciences, University of Hong Kong, Hong Kong, SAR, China
2.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China 430074
3.Faculty of Earth Resources, China University of Geosciences, Wuhan, China 430074
4.State Key Lab of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China 550002
Recommended Citation
GB/T 7714
Xin-Fu Zhao;Mei-Fu Zhou;Jian-Wei Li;Liang Qi. Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: Their possible link to the supercontinent cycle[J]. Mineralium Deposita,2013,48(1):129-136.
APA Xin-Fu Zhao;Mei-Fu Zhou;Jian-Wei Li;Liang Qi.(2013).Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: Their possible link to the supercontinent cycle.Mineralium Deposita,48(1),129-136.
MLA Xin-Fu Zhao;Mei-Fu Zhou;Jian-Wei Li;Liang Qi."Late Paleoproterozoic sedimentary rock-hosted stratiform copper deposits in South China: Their possible link to the supercontinent cycle".Mineralium Deposita 48.1(2013):129-136.
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