太行山中段寺沟岩体电性结构分析及深部成矿预测

doi:10.11720/wtyht.2018.1564

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Abstract

The Sigou rock mass is a Yanshanian acid rock mass in the middle of the Taihang Mountain and has the same formation period with the Mapeng rock mass. Lots of geological and geophysical work has been carried out in the past years, and porphyry crytptoexplosive breccia type silver and polymetallic sulfide deposits have been found. However, due to the uncertainty of the spatial distribution of the rock mass, the deep exploration prospect has been doubtful. In this paper, the author employed Audio Magnetotelluric (AMT) to divide the boundary of the rock mass based on obvious electrical differences from the surrounding rock, and drew the spatial distribution characteristics. It is believed that the electrical structure of the Sigou rock mass is mainly characterized by "Y" type low resistivity, with the upper part being exposed veins, and the lower part being hidden rock mass. The bifurcation compounding part of the "concave" low-resistance zone is favorable for the formation of cryptoexplosive breccia polymetallic sulfide deposits, whereas the high and low resistance gradient zone (inner zone) is the contact part between the rock mass and the surrounding rock, which is conducive to the formation of alteration belt type polymetallicl sulfide deposits.

Key words： Sigou rock mass cryptoexplosive breccia AMT geoelectric structure mineral prospecting

Received: 14 December 2017 Published: 24 October 2018

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	Zhi-Zhao KONG

Cite this article:

Zhi-Zhao KONG. The geoelectric structure characteristics and mineral prospecting of the Sigou rock mass in Middle Taihang Mountain[J]. Geophysical and Geochemical Exploration, 2018, 42(5): 882-888.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2018.1564 OR https://www.wutanyuhuatan.com/EN/Y2018/V42/I5/882

岩性	$范围 Ω · m$	$平均值 Ω · m$	备注
浅粒岩	718~8046	3704.5
片麻岩	780~6475	2294.2
石英斑岩	155~430	299.6	黄铁矿化发育
霏细岩	3.6~155.8	42.8	黄铁矿化发育

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