综合物探方法在湖南香花岭矿田三合圩矿区深部成矿规律研究中的应用

doi:10.11720/wtyht.2020.0135

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Abstract

In this study, the surface anomaly distribution characteristics were quickly grasped by performing high-precision magnetic methods on the ground in the Sanhexu mining area of the Xianghualing orefield. Preliminary prediction anomalies are mainly caused by northeastward fault zones. The magnetic anomalies were analyzed by using CSAMT, and a continuous high-resistance uplift was found in the middle and deep parts. The anomaly is inferred to be granite. On such a basis, the authors began inversion of the magnetic anomaly, and it is found that the magnetic object is layered at the edge of the granite and is located in a low-resistance anomaly zone. According to the results of geophysical inference, the favorable metallogenic sites were selected for drilling and exposure. The boreholes ZK502, ZK1601, and ZK3001 successfully verified the inferred granite and revealed high level tin-lead-zinc polymetallic orebody in the sandstone of the Tiaomajian stratum. Based on the results of drilling, geophysical prospecting, and geological background, the authors carried out a comprehensive analysis and study of the metallogenic regularity of the mining area, established a metallogenic model, and delineated the next target for ore prospecting. The above two geophysical methods have good effects on the prediction of deep mineralization.

Key words： high precision magnetic method CSAMT deep prospecting metallogenic model

Received: 23 March 2020 Published: 29 December 2020

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	Articles by authors
	Li-Jun QU
	Qing WANG
	Bo LI
	Wei YAO

Cite this article:

Li-Jun QU,Qing WANG,Bo LI, et al. The application of multiple geophysical methods to the study of deep metallogenic regularity in the Sanhexu mining area, the Xianghualing orefield, Hunan Province[J]. Geophysical and Geochemical Exploration, 2020, 44(6): 1313-1321.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.0135 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I6/1313

Regional geological and geophysical background of the exploration area
a—geological map of area;b—aeromagnetic survey ΔT contour plan(nT);c—residual gravity anomaly map(mGal)

Statistical table of physical characteristics in the area

Geological conditions and geophysical profile settings in the exploration area
1—limestone, dolomite and dolomitic limestone of Devonian Qiziqiao Formation; 2—quartz sandstone and argillaceous siltstone of the second member of Devonian Tiaomajian Formation; 3—Cambrian sandstone; 4—geological boundary; 5—fault zone; 6—iron-manganese cap; 7—drilling location; 8—geophysical prospecting profile; 9—mining rights scope

High-precision magnetic method speculation results in the exploration area

Comprehensive geophysical interpretation map of line-10 profile

Comprehensive geophysical interpretation map of line-16 profile

Comprehensive geophysical interpretation map of line-20 profile

Geological section of ZK3001 borehole

The spatial position relation diagram of ore body,stratum and rock body

Metallogenic prediction model diagram
1—Devonian Shetianqiao Formation; 2—Devonian Qiziqiao Formation; 3—Devonian Tiaomajian Formation; 4—geological boundary; 5—fault zone; 6—mineralization boundary; 7—granite; 8—greisenization and potassium Nb, Y zone; 9—greisenization and vulcanized W, Sn zone; 10—tremolite and chloritization Sn, Pb, Zn zone; 11—pyritization and carbonic acid Salinized Pb, Zn zone; 12—carbonic acid Salinized F, Hg zone; 13—Pb, Zn ore body; 14—Sn, Pb, Zn ore body; 15—W, Sn ore body

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