基于重、磁、电资料的陕西山阳池沟矿区找矿预测

doi:10.11720/wtyht.2021.0075

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Abstract

In recent years, Northwest Nonferrous 713 General Team Co., Ltd. has successively carried out geophysic exploration work such as IP middle stage in Chigou ore rights area, and gained Many achievements, but the information about Chigou rock mass distribution, rock and ore controlling fault structure, rock contact zone and other information is not fully clarified. Based on the newly completed gravity, magnetic and electric comprehensive geophysical prospecting data of Chigou Cu-Mo deposit, combined with the existing geological and borehole data in the study area, gravity, magnetic force and AMT data were processed, and the characteristics of gravity and magnetic anomaly field in the area were comprehensively analyzed, the rock and ore controlling fault structure was delineated and the main magma invasion channel was found. The intrusion range of concealed rock mass closely related to mineralization was determined, and two concealed and semi-concealed rock masses were delineated. The geophysical field characteristics of concealed rock mass, contact zone of rock mass and mineralized body are clarified, and the contact zone of rock mass and stratum is the main metallogenic site. The favorable prospecting area is predicted, and the prospecting breakthrough is obtained through drilling verification. The research results have important reference significance for further exploration of copper and molybdenum deposits in this area.

Key words： Shanyang Chigou gravity, magnetic and electric anomaly concealed rock mass prospecting prediction

Received: 09 February 2021 Published: 15 December 2021

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	Rui-Feng DUAN
	Bing-Qiang YUAN
	Xu-Liang FENG
	Yang-Yang QIANG
	Ben-Ben DUAN
	Jin-Cheng XING
	Lei LIU

Cite this article:

Rui-Feng DUAN,Bing-Qiang YUAN,Xu-Liang FENG, et al. Prospecting prediction of Chigou mining area in Shanyang, Shaanxi Province based on gravity, magnetic and electric data[J]. Geophysical and Geochemical Exploration, 2021, 45(5): 1196-1207.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.0075 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I5/1196

Tectonic location map of Chigou area
Ⅰ—North China plate;Ⅱ—Yangtze plate;Ⅲ—Qinling fold system;Ⅲ₁—Caledonian fold belt of North Qinling;Ⅲ₂—Lixian-Zhashui Variscan fold belt in South Qinling;Ⅲ₃—South Qinling Indosinian fold belt;Ⅲ₄—Beidabashan Caledonian fold belt;Ⅳ—Songfan-Ganzi fold system; Ⅴ—Huicheng depression;Ⅵ—Nanyang depression;F₁—Shangnan-Danfeng fault;F₂—Fengzhen-Shanyang fault;F₃—Shiquan-Ankang fault ;1—primary structural unit boundary;2—secondary tectonic unit boundary;3—fracture band;4—Chigou area

Geological map of Chigou area

Statistical table of rock and ore density in Chigou area

Statistical table of magnetic susceptibility of rocks and ores in Chigou area

Statistical table of electrical parameters of rocks and ores in Chigou area

Contour map of bouguer gravity anomaly

Superposition diagram of after depolarization magnetic ΔT anomaly and interpretation inference

Apparent resistivity anomaly map of IP intermediate gradient

Apparent polarizability anomaly map of IP intermediate gradient

IP sounding and AMT profile location map

Apparent resistivity pseudosection of IP sounding in Jiguangou

Apparent polarizability pseudosection of IP sounding in Jiguangou

AMT profile inversion contour map

Superposition diagram of gravity anomaly level total gradient and interpretation inference

Comprehensive interpretation and inference map of profile P1

Comprehensive interpretation and inference map of profile P2

Superimposed map of favorable prospecting area and top buried depth of rock mass

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