Origin of hydrothermal deposits related to the Emeishan magmatism

	Origin of hydrothermal deposits related to the Emeishan magmatism
	Yingkui Xu; Zhilong Huang; Dan Zhu; Taiyi Luo
	2014
发表期刊	Ore Geology Reviews
卷号	63 期号:1 页码:1-8
摘要	In the western Yangtze Block, southwest China, there are many hydrothermal native copper ore deposits and Zn-Pb ore deposits. All of these hydrothermal ore deposits are spatially associated with the Permian Emeishan flood basalts (EFBs), although they are much younger than the EFB. The maximum time interval between the hydrothermal ore deposits and the EFB is over 100 Ma. During this time interval, there is no documented magmatism in this region, and many studies indicate that magmatic fluids played important roles in the formations of these deposits. Thus, the origin of these hydrothermal deposits has long been controversial. In this study, we present a model that considers the underplated Emeishan basalts at the base of the crust as the main source of the ore-forming metals and fluids and present thermal simulation results of the evolution of the underplated Emeishan basalt. The results indicate that the underplated basalts begin to release metal-bearing fluid at 30 Ma after the onset of the underplating, consistent with age data of the oldest hydrothermal deposits in this region, such as the Huize Pb-Zn and native Cu ore deposits. The simulation results also indicate that the releasing ore-forming fluid from the crystallising underplated basalts can last over 100 Ma, which almost covers the entire age data available for the hydrothermal deposits, and thus successfully demonstrates the lack of temporal association between the hydrothermal deposits and the EFB. The model is developed primarily for the origin of the hydrothermal mineralisation in the SYG province, but it has general applicability to other sediment-hosted Pb-Zn deposits around the world.
关键词	Hydrothermal Ore Deposit Pb–zn Deposit Underplated Emeishan Basalts Thermal Simulation Volatile Ore-forming Fluid Sediment-hosted Pb–zn Deposits Age Of Ore Deposit
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5262
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Yingkui Xu,Zhilong Huang,Dan Zhu,et al. Origin of hydrothermal deposits related to the Emeishan magmatism[J]. Ore Geology Reviews,2014,63(1):1-8.
APA	Yingkui Xu,Zhilong Huang,Dan Zhu,&Taiyi Luo.(2014).Origin of hydrothermal deposits related to the Emeishan magmatism.Ore Geology Reviews,63(1),1-8.
MLA	Yingkui Xu,et al."Origin of hydrothermal deposits related to the Emeishan magmatism".Ore Geology Reviews 63.1(2014):1-8.

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