Modeling experimental study on weathering-leaching of Emeishan basalt and its relation with metallogenesis

	Modeling experimental study on weathering-leaching of Emeishan basalt and its relation with metallogenesis
	Fudong Wan; Xiaoqing Zhu; Tao Han; Zengsheng Li
	2010
Source Publication	Chinese Journal of Geochemistry
Volume	29 Issue:2 Pages:212-216
Abstract	The Emeishan basalt has a high Cu background value (170×10⁻⁶ on average), and thus provides a ore-forming material source for copper ores. The collected samples were exposed in basalt lavas of the third segment of the Emeishan basalt eruptive cycle. By using a set of automatically cycling glass apparatuses, weathering-leaching experiments by three kinds of rainwater on the collected samples were carried out in the open system (at normal temperature and normal pressure). The analysis results showed that the most intensive export of Cu occurred under acidic rainwater-induced weathering-leaching conditions, almost 2–3 orders of magnitude the export of Cu by modern air rainwater, and 1–2 orders of magnitude higher than the export of Cu by CO₂ rainwater. In addition, the total amount of Zn, Cu, U, Ni and Sr exported by acidic rainwater are greater than 1%. All this indicates that copper in the Emeishan basalt provided the copper source for Cu mineralization at the contact between the basalt and the Maokou Formation limestone at the bottom.
Keyword	Emeishan Basalt Copper Ore Weathering-leaching Experiment Ore Deposit
Subject Area	矿床地球化学
Indexed By	EI
Language	英语
Document Type	期刊论文
Identifier	http://ir.gyig.ac.cn/handle/352002/6712
Collection	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
Recommended Citation GB/T 7714	Fudong Wan,Xiaoqing Zhu,Tao Han,et al. Modeling experimental study on weathering-leaching of Emeishan basalt and its relation with metallogenesis[J]. Chinese Journal of Geochemistry,2010,29(2):212-216.
APA	Fudong Wan,Xiaoqing Zhu,Tao Han,&Zengsheng Li.(2010).Modeling experimental study on weathering-leaching of Emeishan basalt and its relation with metallogenesis.Chinese Journal of Geochemistry,29(2),212-216.
MLA	Fudong Wan,et al."Modeling experimental study on weathering-leaching of Emeishan basalt and its relation with metallogenesis".Chinese Journal of Geochemistry 29.2(2010):212-216.

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