高精度航磁在辽宁瓦房店地区金刚石调查中的应用

doi:10.11720/wtyht.2022.1652

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Abstract

Wafangdian region is an important diamond ore concentration area in Liaoning privence of china, and the metallogenic mother rock is mainly kimberlite. Based on the 1∶10 000 high-precision aeromagnetic data in Wafangdian region, combined with the regional geological background and rock magnetic characteristics, this paper analyzes and summarizes the aeromagnetic anomaly characteristics of the kimberlite. It is found that the distribution direction and shape of the kimberlite rock are mainly controlled by the NEE and NE faults. Generally, the magnetism of kimberlite is strong, which is quite different from that of surrounding rock. The kimberlite corresponds to the NEE-trending isolated aeromagnetic anomaly, and the shape is mostly elliptical. The anomaly amplitude is not greater than 50 nT, and the anomaly distribution range is greater than the exposed area of rock mass. Aeromagnetic anomalies have important indicative significance for the prospecting of kimberlite, which can be used to guide the next geological prospecting deployment.

Key words： Liaoning Wafangdian kimberlite high precision aero-magnetic ΔT anomalies ore-prospecting direction

Received: 05 December 2021 Published: 28 June 2022

ZTFLH:

P631

Corresponding Authors: JIA Zhi-Ye E-mail: anzhanfeng@mail.cgs.gov.cn;jiazhiye@mail.cgs.gov.cn

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	Zhan-Feng AN
	Zhi-Ye JIA
	Meng WANG

Cite this article:

Zhan-Feng AN,Zhi-Ye JIA,Meng WANG. Application study of high precision aero magnetic to Wafangdian diamond deposit exploration in Liaoning Province[J]. Geophysical and Geochemical Exploration, 2022, 46(2): 337-343.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1652 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I2/337

Geological sketch of Wafangdian region
1—Cenozoic; 2—Mesozoic; 3—Paleozoic; 4—Neoproterozoic Sinian series; 5—Neoproterozoic Nanhua series; 6—Neoproterozoic Qingbaikou series; 7—Paleoproterozoic; 8—Archean gneiss; 9—middle acid intrusive body; 10—diorate porphyrite; 11—dolerite; 12—fault; 13—kimberlite and ore belt number; 14—diamond ore belt section line and marking; 15—scope of diamond ore belt; 16—study aera

Statistical table of magnetic parameters of rocks in the study area

Reduction-to-the-pole of aeromagnetic ΔT anomalies map in Wafangdian region

Statistical table of aeromagnetic anomalies of the discovered kimberley rock in Wafangdian region

Aeromagnetic anomaly characteristics of kimberlite in Liaotiangou area
1—location and number of kimberlite; 2—aeromagnetic inferred fracture;a—aeromagnetic ΔT anomalies contour map; b—aeromagnetic vertical gradient contour map

Aero-magnetic anomaly characteristics of No.48, No.75 kimberley rock
1—location and number of kimberlite; 2—aeromagnetic inferred fracture;a—aero-magnetic ΔT anomalies contour map; b—aeromagnetic vertical gradient contour map

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