安徽西湾铅锌矿含矿层位顶部原生晕特征

doi:10.11720/wtyht.2022.1406

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Abstract

The Xiwan lead-zinc deposit in Anhui Province is located on the northern margin of the Luzong volcanic basin. This deposit is an overburden area, causing great difficulties with exploration. Based on the analysis results of borehole core samples, this study analyzed the characteristics of the primary halos of the Xiwan lead-zinc deposit. The results show that the mineralized zone and its roof and floor have significantly different contents and anomaly characteristics of elements. Specifically, brecciated limestones in the mineralized zone have high contents of elements such as Pb, Zn, Ag, As, Sb, Bi, Au, Cu, and Mo. These elements feature high anomaly intensity and large anomaly scales and have definite concentrations and component zoning. These element anomalies effectively reflect the characteristics of orebodies and significantly indicate the NE-trending extension of ore bodies. The volcanic rocks on the roof of the mineralized zone have high contents of elements such as As, Sb, Pb, Zn, and Ag. These elements feature weak anomalies without significant zoning. These element anomalies can only indicate the ore bodies near the sampling points. The anhydrites on the floor have low contents of the abovementioned elements, without significant anomaly. Therefore, As, Sb, Pb, Zn, Ag, and Mo are indicator elements of lead-zinc mineralization in the study area. The brecciated limestones in the mineralized zone have high element contents, forming anomalies with high intensity and large scales. Moreover, these anomalies are characterized by significant concentrations and component zoning and can clearly indicate the extension direction of ore bodies. The contents and anomaly characteristics of elements in the core samples collected from different metallogenic parts can guide the further prospecting of the mining area.

Key words： overburden area lead-zinc deposit primary halo Luzong volcanic basin

Received: 22 July 2021 Published: 03 January 2023

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	Articles by authors
	Pei-Sheng CHENG
	Shu-Chao WANG
	Zhuang LI
	Da-Nian GU
	Jian-Ming ZHANG
	Dong-Xu DU

Cite this article:

Pei-Sheng CHENG,Shu-Chao WANG,Zhuang LI, et al. Primary halo characteristics on the top of the ore-bearing horizon in the Xiwan lead-zinc deposit in Anhui Province[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1381-1387.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1406 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1381

Bedrock geological map of Xiwan mining area
1—lower Cretaceous Longmenyuan formation;2—lower Jurassic Moshan formation;3—upper Triassic Lalijian formation;4—middle Triassic Tongtoujian formation;5—middle Triassic Dongma’anshan formation;6—lower Triassic Nanlinghu formation;7—trachyandesite porphyry;8—diorite;9—speculate on geological boundaries;10—speculative faults;11—horizontal projection of the orebody;12—scope of study area;13—exploration lines

The 20 line geological profile of Xiwan Pb-Zn mine

The Ⅱ line geological profile of Xiwan Pb-Zn mine

Statistical table of main lithologic element contents in Xiwan mining area

Element cluster analysis pedigree diagram

List of threshold and anomaly zoning values

The first volcanic rock sample element anomaly diagram

The first limestone sampleelement anomaly diagram

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