烃汞气体测量法在中非沉积型铜矿的找矿可行性研究

doi:10.11720/wtyht.2023.2565

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Abstract

Sedimentary copper deposits are the predominant type of copper (cobalt) mineralization in the Central African copper-cobalt metallogenic belt. To improve the prospecting efficiency of such deposits, the feasibility of applying the hydrocarbon-mercury gas measurement method in the prospecting of sedimentary copper deposits was studied in the Mabende-Likasi area of the Democratic Republic of Congo. As indicated by the test results, two known ore bodies show remarkable anomalies of multiple indicators of hydrocarbon and mercury, but the anomaly distribution is controlled by the occurrence of orebodies. Based on these findings, this study summarized the anomaly pattern of hydrocarbon-mercury gas and primarily explored the anomaly causes. Moreover, this study conducted the prospecting prediction of concealed copper (cobalt) deposits in the study area. An industrial copper orebody was discovered through drilling in the delineated favorable target area, thus achieving achieved prospecting results.

Key words： hydrocarbon-mercury gas measurement method sedimentary copper deposit prospecting feasibility study

Received: 14 October 2021 Published: 24 February 2023

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	Articles by authors
	Xue-Qiang HUANG
	Yuan-Rong CHEN
	Er WU
	Feng LIU
	An-Ning LU

Cite this article:

Xue-Qiang HUANG,Yuan-Rong CHEN,Er WU, et al. The feasibility of applying hydrocarbon-mercury gas measurement method in the prospecting of sedimentary copper deposits in Central Africa[J]. Geophysical and Geochemical Exploration, 2023, 47(1): 31-38.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.2565 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I1/31

Traffic location of Lufrian Cu-Co metallogenic belt

Regional geological map in research area
1—lake;2—Quaternary system;3—Kundelungu group;4—Nguba group;5—Mwashia group;6—the lower Roan subgroup;7—geological boundary;8—fault;9—Cu(Co) deposits above medium size and names;10—scope of research area(test area and inferred area)

Geochemical parameters of hydrocarbon mercury components in test area

Geological hydrocarbon anomaly profile of 2680 in BD mining area
1—topsoil;2—Kundelungu group sandy shale with dolomite;3—silicified dolomite;4—argillaceous/dolomitic shale;5—the lower Roan subgroup (R1) heterogeneous (complex) breccia;6—measured/inferred geological boundary;7—measured/inferred fault;8—drill hole under construction and numbers;9—copper orebody

Geological hydrocarbon anomaly profile of P2 in Mabende-mining area
1—glacial migmatite (small conglomerate);2—dolomitized sandstone, siltstone or shale;3—Roan group (R3) dolomite, dolomitized siltstone;4—copper orebody;5—measured/inferred geological boundary;6—fault

Geological hydrocarbon anomaly profile of 04 in Keyi Mining area
1—Quaternary laterite layer;2—talc siltstone;3—silicified siltstone;4—siliceous shale intercalated argillaceous rock;5—dolomitic shale and argillaceous siltstone;6—Kundelungu group siltstone and shale;7—measured/inferred geological boundary;8—measured/inferred fault;9—verfication drill hole and numbers;10—industrial copper orebody

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