物探方法在复兴屯银铅锌多金属矿区构造与成矿机理研究中的应用

doi:10.11720/wtyht.2021.1290

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Abstract

The Fuxingtun silver-lead-zinc polymetallic deposit is the first large-scale silver-lead-zinc polymetallic deposit discovered in the Mesozoic continental volcanic basin in the Daxinganling metallogenic belt in the past two years. During the census of the deposit, geophysical methods such as high-precision magnetic survey on the ground, time-domain induced polarization method, and AMT sounding method were conducted. Geophysical methods played an important guiding role in the exploration of Fuxingtun silver-lead-zinc polymetallic deposit. ① Through the processing and interpretation of ground magnetic anomaly data (using RGIS software),the structure of the census area were determined; ② Using the characteristics of geomagnetic anomaly and apparent resistivity anomaly, combined with the exposed lithology on the surface, the caldera rifted basin was determined;③ Using the electrical sounding data, the formation process and structural characteristics of the faulted basin was determined, as well as the multi-stage of fault structure and the multi-stage of sulfide precipitation; ④ Based on the abnormal characteristics of apparent polarizability and the geological structure environment, the nature of the field source and the source of mineralization materials were determined;⑤ The intrusive body of cylindrical subvolcanic rock was delineated by AMT sounding data. Based on the above research results and drilling data, this paper studies the formation mechanism of the deposit and summarizes a set of application ideas for geophysical methods to find such deposits.

Key words： silver-lead-zinc polymetallic deposit mineral exploration geophysics Fuxingtun, Inner Mongolia

Received: 04 June 2020 Published: 29 April 2021

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	Articles by authors
	Xin-Qiang LIANG
	Zhan-Hua QIAO
	Qiang YAN
	Liang WANG
	Jian-Feng LI
	Xiao-Hui LIU
	Miao WANG

Cite this article:

Xin-Qiang LIANG,Zhan-Hua QIAO,Qiang YAN, et al. Application of geophysical methods in the exploration of Fuxingtun silver-lead-zinc polymetallic deposit and its metallogenic mechanism[J]. Geophysical and Geochemical Exploration, 2021, 45(2): 323-336.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1290 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I2/323

Geological map of Section 1 of the Fuxingtun silver-lead-zinc polymetallic deposit(1∶10 000)

Statistics of measurements of magnetic parameters of rocks in Fuxingtun (Section 1)

Map of RTP of ΔΤ from ground magnetic survey of Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit (1∶10 000)

Core section and side photo of drill hole ZK1304 at 580m in Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit

Contour of ground magnetic anomaly after normalized filtering and interpreted structures of Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit (1∶10 000)

Regional electric parameters of rocks

ρ_s conntour map from time-domain IP survey in Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit (1∶10 000)

η_s conntour map from time-domain IP survey in Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit (1∶10 000)

Electrode array settings for IP sounding with Wenner arrangement

ρ_s and η_s conntour map of time-domain IP sounding(Wenner arrys) along profile 24 in Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit (1∶5 000)

η_s and ρ_s of time-domain IP and the geological section along profile P10and P11 in Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit (1∶2 000)

ρ_s contour map at the depth of 120 m,630 m,1 550 m and 2 050 m of AMT survey in Section 1 of Fuxingtun silver-lead-zinc polymetallic deposit (1∶5 000)

RTP Map of ΔΤ of ground magnetic survey in Fuxingtun area, Youyi-qianqi of Kerqin (1∶50 000)

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