广域电磁法在辽东新房金矿深部勘查中的应用

doi:10.11720/wtyht.2025.1087

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Abstract

The Xinfang gold deposit resides in the gold polymetallic ore concentration area in eastern Liaoning Province. Based on regional metallogenic patterns and existing exploration results, the southern part of the Yalu River fault zone, where the Xinfang gold deposit is located, shows significant potential for gold resources. As exploration progresses, more gold ore bodies are expected to be discovered in the gold deposit area. However, the lack of effective deep exploration techniques limits further exploration and exploitation in the area, failing to effectively reveal the extensions of lithological boundaries and the distributions of fault structures in the area. This study presented the first application of the wide-field electromagnetic method in the area. Based on the obtained results and geological engineering information, this study delineated the electrical layers within a depth of 3 km, determining the thickness of the Neoproterozoic cap rocks and inferring several fault zones. Combined with existing geological data, this study identified the low-resistivity anomaly zone at a depth of about 1 km as an extensional structural plane caused by ductile shearing. Overall, this study provides valuable geophysical data for establishing a geological prospecting model for eastern Liaoning Province, holding significant research value for geological and mineral exploration in the area.

Key words： wide-field electromagnetic method gold deposit deep exploration low-resistivity anomaly

Received: 11 March 2024 Published: 23 October 2025

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	Wei-Tian LIANG
	Jia-Xin FENG
	Di-Quan LI
	Jun ZHENG

Cite this article:

Wei-Tian LIANG,Jia-Xin FENG,Di-Quan LI, et al. Application of the wide-field electromagnetic method in the deep exploration of the Xinfang gold deposit,eastern Liaoning Province[J]. Geophysical and Geochemical Exploration, 2025, 49(5): 1061-1069.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.1087 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I5/1061

Schematic diagram of geological formations of Xinfang Gold Mine in Liaodong
1—Quaternary alluvial and marine deposits; 2—Quaternary pluvial deposits; 3—Pulandian Formation of Cretaceous; 4—Cambrian middle series; 5—Cambrian lower series; 6—Neoproterozoic Qingbaikou System Diaoyutai Formation; 7—Qingbaikou System Qiaotou Formation of Neoproterozoic; 8—Qingbaikou System Nanfen Formation of Neoproterozoic; 9—Gaixian Formation of Paleoproterozoic; 10—Dashiqiao Formation of Paleoproterozoic; 11—Archean biotite plagioclase gneiss; 12—Archean biotite monzonite gneiss; 13—late Jurassic Taipingling unit granodiorite; 14—metal ore occurrence; 15—geological boundary; 16—fracture tectonic zone

Physical property statistics

Instrument consistency comparison graph

Wide field section deployment diagram

Comparison of original curves at point 10 of L5 with different field sources

The first statistical curve of apparent resistivity

L3 wide field comprehensive interpretation diagram

Comprehensive interpretation map of WFEM

Interpretation plan of wide field section fault structure

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