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Lateral variation of aeromagnetic anomaly in South China and its tectonic implications

  • Xiaosan ZhuEmail author
  • Hongwei Zheng
  • Minjie Lu
Original Paper

Abstract

We present a series of images from the aeromagnetic data observed in South China areas, and reveal the detailed structures of the South China Block. By using lateral variation of the aeromagnetic anomalies, we characterize individual geological blocks and suggest the deep boundaries of the blocks. The Yangtze Block and Jiangnan orogenic belt are characterized by low aeromagnetic anomalies, whereas high values of the aeromagnetic anomaly are observed in the Cathaysia Block. The boundary between the Yangtze and Cathaysia blocks, which remains unclear to date, can be plotted along the large magnetic gradients. The high magnetic anomalies significantly relate to volcanic distributions in South China areas. These aeromagnetic observations seem to be useful to investigate the intracontinental tectonic evolution in this region.

Keywords

Aeromagnetic data Derivative enhancement Tectonic boundary South China 

Notes

Acknowledgements

This work was jointly funded by the National Science Foundation of China (Nos. 41404070 and 41374101) and China Geological Survey (Nos. DD20190448 and DD201609-05).

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Copyright information

© Geologische Vereinigung e.V. (GV) 2019

Authors and Affiliations

  1. 1.Institute of GeologyChinese Academy of Geological SciencesBeijingPeople’s Republic of China

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