金属元素形成原生晕能力定量评价——以青海省扎家同哪金矿为例

doi:10.11720/wtyht.2021.1134

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Abstract

A procedure to screen the elements used in the research on the elemental zonation in a primary halo is rarely conducted, which is not conducive to the acquisition of an accurate understanding of the rules of elemental zonation. In this paper, the authors chose the Zhajiatongna gold deposit in Qinghai Province as a study case and aimed to study the difference between ore-forming metallic elements in the ability of forming a primary halo through comparing the elemental enrichment degrees in the wall rocks, mineralized wall rocks, and orebodies and on the basis of 2 779 samples from the drill cores of the deposit. It is found that the concentrations of Au, As, Sb, Hg, W, and Ag progressively increase from the wall rocks through mineralized wall rocks to orebodies, indicating a greater possibility of forming a primary halo for these elements. Zinc is enriched only in the orebodies, with less possibility of forming a large-scale primary halo. Elements of Mo, Cu, Pb, and Sn show insignificant enrichment or even show depletion, indicating a less possibility of forming a primary halo.A trend of enrichment zonation of ore-forming elements was recognized: Au, As, Sb in the wall rocks, Au, As, Sb, W, Hg (Ag) in the mineralized wall rocks, and Au, As, Ag, Sb, W, Hg and Zn in the orebodies. Elements show a decreasing weight of enrichment in the mineralized wall rocks in order of As, Hg, Au, Sb, W, Mo, Sn, Pb, Zn, Cu, and Ag, suggesting the progressively decreasing ability of entering into the wall rocks from the orebodies in order of low-temperature metallogenic elements through medium-temperature metallogenic elements to high-temperature metallogenic elements. Therefore, in the Zhajiatongna gold deposit, elements such as As, Hg, Au, Sb and W are optimal for researches on elemental zonation and mineral prediction.

Key words： primary halo enrichment degree ability of forming a primary halo quantitative evaluation Zhajiatongna gold deposit

Received: 21 March 2020 Published: 29 April 2021

ZTFLH:

P632

Corresponding Authors: HOU Zhen-Guang E-mail: sdyzx86@126.com;up.hzg@126.com

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	Articles by authors
	Zhao-Xian YUAN
	Zhen-Guang HOU
	Zhi-Dong REN
	Yong-Le LIU
	Da-Ming ZHANG
	Jian-Ping ZHANG

Cite this article:

Zhao-Xian YUAN,Zhen-Guang HOU,Zhi-Dong REN, et al. Quantitative evaluation of the ability of elements in forming primary halos: A case study of the Zhajiatongna gold deposit, Qinghai Province[J]. Geophysical and Geochemical Exploration, 2021, 45(2): 292-300.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1134 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I2/292

Analytical methods and the limits of detection for the elements

Sketch of element enrichment in the wall rocks, mineralized wall rocks and orebodies
①—elemental enrichment in the wall rocks;②—elemental enrichment in the mineralized wall rocks;③—elemental enrichment in the orebodies

Characteristics of metal element contents of 2 779 samples from the Zhajiatongna deposit

Trends of elemental enrichment factors changing in the wall rocks,the mineralized wall rocks and the orebodies

Enrichment factors of wall rock and the differences among rock types

Enrichment factors of mineralized wall rock and the differences among rock types

Elemental enrichment factors of orebody

Weights of elemental enrichment in the three mediums

Enrichment or depletion of element versus the ability of forming a primary halo

Spatial patterns of elemental enrichment in the Zhajiatongna deposit

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