四川石棉大渡河地区金矿带基于AMT的地质—地球物理找矿模型

doi:10.11720/wtyht.2024.1545

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Abstract

The gold ore zone in the Daduhe area of Shimian County, Sichuan Province, is located in the rare metal-precious metal-nonferrous polymetal metallogenic belt in the southern segment of the Songpan-Ganzi orogenic belt. It exhibits complex structures and steep terrains, severely restricting prospecting and exploration. Based on the geological settings, conditions, and geophysical characteristics for regional mineralization, this study investigated the typical Luoluoping gold deposit in Shimian by conducting deep geophysical exploration centered on audio-frequency magnetotellurics (AMT). Three low-resistivity anomalies (M1, M2, and M3) were identified, corresponding to the mineralized alteration zone I, the gold mineralization zone III, and the gold-copper ore body, respectively, demonstrating the effectiveness and applicability of geophysical methods for deep prospecting. Combined with geological understanding and engineering verification, this study summarized geological and geophysical prospecting markers for the typical gold deposit, establishing the geological-geophysical prospecting model for the gold ore zone in the study area. Therefore, this study provides technical support for deep prospecting in the study area.

Key words： Shimian gold ore zone geophysics prospecting model

Received: 19 December 2023 Published: 21 October 2024

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	Articles by authors
	Wen YAO
	Jun GUO
	Chong-Bo SUN
	Hong-Bing ZHOU
	Hong-Chao ZHANG

Cite this article:

Wen YAO,Jun GUO,Chong-Bo SUN, et al. AMT-based geological-geophysical prospecting model for the gold ore zone in the Daduhe area, Shimian County, Sichuan Province[J]. Geophysical and Geochemical Exploration, 2024, 48(5): 1247-1257.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1545 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I5/1247

Geotectonic location of the study area

Geological schematic map of Dadu River in Shimian area
1—granite;2—basite;3—diabase;4—Quaternary;5—deposits;6—principal shear zone;7—nappe belt;8—thrust belt;9—strike-slip fault;10—mylonite zone

Structure rigid diagram of Luoluoping typical orefield

Regional physical property results plan

Statistical table of electrical parameters

Topographic map of typical mining area and geophysical exploratory line

Resistivity-depth inversion profiles

Comprehensive stereogram of AMT low resistance anomalous body

Geology-low resistivity anomaly M1 stereogram

Geology-low resistivity anomaly M2 stereogram

Geology-low resistivity anomaly M3 stereogram

Typical mining area prospecting signs

Geological and geophysical prospecting model of Dadu River area in Shimian

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