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ORIGINAL RESEARCH article
Front. Earth Sci.
Sec. Solid Earth Geophysics
Volume 13 - 2025 | doi: 10.3389/feart.2025.1553606
Detection and Characteristic Analysis on the Basement Interface of the Crust in Guangxi, China
Provisionally accepted- 1 Guilin University of Technology, Guilin, Guangxi Zhuang Region, China
- 2 Geophysical Survey Institute of Guangxi, Nanning, China
- 3 Guangxi Polytechnic of Construction, Nanning, China
To analyze the three basement interfaces of the crust in Guangxi, China (the Crystalline Basement Interface, the Conrad discontinuity, and the Moho discontinuity), seismic and gravity exploration were conducted. Firstly, using the depth values of the crustal interfaces obtained from seismic data within the study area as constraints, gravity data were utilized to investigate the undulating morphology of the basement surfaces. Secondly, through gravity field separation techniques, density interface fitting inversion was performed to infer the undulating morphology of the Guangxi Crystalline Basement Interface, the Conrad discontinuity, and the Moho discontinuity.Depth distribution maps of these interfaces were drawn, and characteristic analyses were carried out. The results show that there is a certain inheritance relationship between the Crystalline Basement Interface, the Conrad discontinuity, and the Moho discontinuity in Guangxi, with the crust exhibiting characteristics of being thicker in the northwest and thinner in the southeast (the mantle subsides downward in the northwest and uplifts upward in the southeast). The spatial attributes of the Guilin-Hezhou mantle subsidence zone and the Yuchengling new mantle amalgamation body were analyzed. Additionally, combining the detailed field characteristics of wavelet analysis, it is believed that the crust of Guangxi has a grid-like, framework regional structural pattern, clarifying the distribution laws of major granite belts, which develop along the mantle subsidence zones and are controlled by deep faults. The research results can provide important references for studies on deep structures and other fields in Guangxi.
Keywords: Guangxi, gravity characteristics, basement interfaces, Tectonic zoning, lithosphere-asthenosphere interaction
Received: 31 Dec 2024; Accepted: 11 Mar 2025.
Copyright: © 2025 Lu, Yang, Yang, Liao and Mo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Yang Yang, Guangxi Polytechnic of Construction, Nanning, China
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