Singular Value Decomposition(SVD) used to extract aero-magnetic anomalies related to Sn-W polymetallic mineralization in SE Yunnan, China

ZHU Xu; CHEN Yongqing; ZHAO Binbin

Geological Bulletin of China > 2021 > 40(5): 764-771.

ZHU Xu, CHEN Yongqing, ZHAO Binbin. 2021: Singular Value Decomposition(SVD) used to extract aero-magnetic anomalies related to Sn-W polymetallic mineralization in SE Yunnan, China. Geological Bulletin of China, 40(5): 764-771.

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Singular Value Decomposition(SVD) used to extract aero-magnetic anomalies related to Sn-W polymetallic mineralization in SE Yunnan, China

1.
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
2.
Sinomine Resource Group Co., Ltd., Beijing 100089, China

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Received Date: August 03, 2020
Revised Date: October 24, 2020
Available Online: August 15, 2023

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Abstract

Abstract

The Sn-W polymetallic ore-concentrated area in SE Yunnan is located at the junction of the Cathaysian Massif, Yangtze Massif, and Indo-China Massif, where there are a series of Sn, W, Cu, Ag, Pb, Zn polymetallic deposits closely related to the Late Cretaceous magmatism.The Singular Value Decomposition(SVD) was applied to extract aero-magnetic anomaly components reflecting the deep geological structures and geological bodies associated with the Sn-W polymetallic deposits and mineralized granitic intrusives from the aero-magnetic data of the SE Yunnan district at a scale of 1:200 000.The results show that there are two metamorphic basements, one with strong magnetism(Dahongshan Group, Ailaoshan Group and Yaoshan Group), and the other with weak magnetism(Mengdong Group); granitoids closely related to W-Sn polymetallic mineralization in the study area shows a ring positive magnetic anomaly around a negative magnetic anomaly, which may reflect a contact skarnization zone around a granitic intrusion; and the ring positive magnetic anomalies around negative magnetic anomaly are the best targets for further exploration of Sn-W polymetallic deposits.
- Singular Value Decomposition(SVD),
- aero-magnetic anomaly,
- Sn-W polymetallic mineralization,
- granitic intrusives,
- Southeast Yunnan

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Singular Value Decomposition(SVD) used to extract aero-magnetic anomalies related to Sn-W polymetallic mineralization in SE Yunnan, China

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Singular Value Decomposition(SVD) used to extract aero-magnetic anomalies related to Sn-W polymetallic mineralization in SE Yunnan, China

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