Volume 32 Issue 5
Oct.  2026
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Article Navigation >  Journal of Geomechanics  > 2026  >  32(5): 1013-1026
HU X Y，XIE J L，ZHANG H L，2026. Study of main faults and deep-seated structural characteristics of Shanghai and adjacent areas based on gravity and magnetic anomalies[J]. Journal of Geomechanics，32（5）：1013−1026 doi: 10.12090/j.issn.1006-6616.2026130
Citation: HU X Y，XIE J L，ZHANG H L，2026. Study of main faults and deep-seated structural characteristics of Shanghai and adjacent areas based on gravity and magnetic anomalies[J]. Journal of Geomechanics，32（5）：1013−1026 doi: 10.12090/j.issn.1006-6616.2026130
shu

Study of main faults and deep-seated structural characteristics of Shanghai and adjacent areas based on gravity and magnetic anomalies

doi: 10.12090/j.issn.1006-6616.2026130
  • 1.

    School of Geophysics and Geomatics, China University of Geosciences (Wuhan), Wuhan 430074, Hubei, China

  • 2.

    Key Laboratory of Geological Survey and Evaluation of Ministry of Education, China University of Geosciences (Wuhan), Wuhan 430074, Hubei, China

  • 3.

    Shanghai Institute of Natural Resources Survey and Utilization, Shanghai 200072, China

Funds:  This research was financially supported by the National Natural Science Foundation of China (Grant No. 42220104002), the National Science and Technology Major Project (Grant No. 2024ZD1001907), and the Wuhan Science and Technology Project (Grant No. 2024030803010169).
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  • Author Bio:

    胡祥云，中国地质大学（武汉）二级教授、博士生导师。2025年荣获第十九次李四光地质科学奖科研奖。国务院政府特殊津贴获得者，国家重点研发计划项目首席科学家，国务院学位委员会第九届学科评议组成员，中国地球物理学会常务理事，Geophysics、GSA Bulletin副主编。长期从事电磁探测与深部资源勘探研究，主持国家重点研发计划、国家自然科学基金重点、部委揭榜挂帅等项目20余项。研究方向涵盖地球物理弱信号提取、壳幔结构探测、地球物理设备研发等。在深部资源勘探中应用CSAMT和AMT技术发现多金属矿体与天然气水合物靶区，构建华南地块东部岩石圈三维地质模型，主导研制的高精度地球物理场观测设备突破零点漂移抑制等技术瓶颈。出版专著7部，在Geophysical Research Letters、Geophysics、《地球物理学报》等期刊发表论文300余篇。获湖北省自然科学奖一等奖等省部级奖励，2019年入选自然资源部高层次科技创新人才梯队

  • Received: 2026-09-05
  • Revised: 2026-09-27
  • Accepted: 2026-09-28
    • Available Online: 2026-09-30
  • Published: 2026-10-28
    Abstract
  •   Objective  Shanghai and its surrounding areas play a vital role in China’s economic development. As the region is also prone to earthquakes that are felt by local residents, its crustal structure has attracted considerable research interest. Despite previous investigations, uncertainties remain regarding the spatial distribution of major deep-seated faults, particularly the Hu-Su and Jiang-Shao faults, and their offshore extensions into the East China Sea.  Methods  Airborne gravity and magnetic data were used to perform three-dimensional physical-property inversion and construct crustal residual-density and magnetization models for the study area.   Results  Correlation analysis of gravity and magnetic anomalies revealed that the sources of these anomalies are distinct but spatially associated, with absolute correlation coefficients below 0.4. Medium-to high-intensity magnetic anomalies are widely distributed along density-anomaly gradient zones, suggesting that intermediate-to-felsic intrusions along the margins of uplifted structures are the main source of the magnetic anomalies.   Conclusions  This study provides critical quantitative constraints on the faults and on a crustal ring structure. Analysis of the gravity and magnetic features of the Hu-Su and Jiang-Shao fault segments that extend into the East China Sea indicates that both faults reach a depth of 20 km and control the tectonic framework of the Shanghai region. In addition, the density model reveals a crustal ring structure in the Yangtze Estuary.  Significance  Our findings highlight the value of 3D inversion models derived from magnetic and gravity data and underscore the need to revise interpretations through 3D inversions of high-quality potential-field data—a step that is vital for understanding the crustal structure in the region.

     

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