基于重磁场特征的洛宁地区构造特征研究及矿产预测

doi:10.11720/wtyht.2023.1462

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Abstract

The Luoning area is located at the junction of the Xiaoshan Uplift and the Luoning Basin and falls into the Quaternary shallow overburden area. Large-scale silver-lead-zinc deposits such as Laoliwan and Zhonghe have been discovered in this area, and their formation is closely related to the acidic plutons controlled by fault structures. This study investigated the distribution of fault structures and acidic plutons based on the processing of 1:50000 gravity and magnetic data using the minimum curvature potential field separation technique, the normalized vertical derivative of the total horizontal derivative (NVDR-THDR) technique, the correlation analysis method, and the three-dimensional physical property inversion. The study results are as follows: (1) The Luoning area is affected by the NW-, NE-, and EW-trending structures; (2) Centering on the Laoliwan area, multiple sets of faults present a ring-shaped distribution with a radius of 6.5 km; (3) Multiple concealed plutons were discovered, and the boundaries of Laoliwan and Zhonghe plutons were re-determined; (4) The distribution of granites is controlled by ring-shaped structures and have a burial depth of about 3 km; (4) The ring-shaped structures are well correlated with magnetic anomaly gradient zones, where ores were found in many boreholes. Therefore, it is of great significance to carry out prospecting studies in these zones.

Key words： Luoning area gravity and magnetic anomaly concealed pluton fault mineral prediction

Received: 21 September 2022 Published: 05 July 2023

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	Articles by authors
	Lei ZHANG
	Wan-Yin WANG
	Xiao-Bo WANG
	Wen LI
	Xue-Li ZHANG
	Hao SONG
	Min YANG
	Li-ming AN

Cite this article:

Lei ZHANG,Wan-Yin WANG,Xiao-Bo WANG, et al. Research on structural characteristics and mineral prediction of the Luoning area based on the characteristics of gravitational and magnetic fields[J]. Geophysical and Geochemical Exploration, 2023, 47(3): 608-617.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.1462 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I3/608

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Geological and mineral map of the southern margin of North China Craton^[5]

Geological Sketch of the study area

Statistical histogram of rock (ore) density (magnetism) in the study area

Bouguer gravity anomaly of the research area

Magnetic anomaly map of the research area

Polar magnetic anomaly of the research area

NVDR-THDR diagram of inferred fault and Bouguer gravity anomaly

Granitic body and residual Bouguer gravity anomaly

Granitic body and residual polar magnetic anomaly

Plane distribution of granite bodies and faults in the study area

3D gravity inversion map
a—3D gravity inversion;b—1 km deep slice;c—2 km deep slice;d—3 km deep slice

Metallogenic prediction and inference diagram

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