Abstract:With the help of visible light, microwave, GPS and gravity data in recent years, we study the surface outcrop morphology, deformation field around the fault zone and block gravity of the Jiangsu section of the Tan-Lu fault zone from the perspective of multi-source remote sensing, supplemented by field investigation and trench excavation. The analysis shows that: 1) The interpretation of the controversial southern position of F5 fault should be located in Houchen village, Sihong county, which is verified by field trench exploration. The exposed length of the surface is about 9 km and the strike is about NNE12°. 2) The surface deformation field retrieved from Sentinel-1A data is consistent with the dextral characteristics of Tan-Lu fault zone since Quaternary, and Suqian, Xinyi and Sixian show subsidence, Pizhou, Suining and Sihong show uplift; the horizontal and vertical deformation rate differences on both sides of the fault are about 4 mm/a and 3 mm/a respectively. 3) GPS deformation field analysis shows that the relative slip on both sides of the fault is about 1.4 mm/a, which is different from the microwave results, reflecting the acceleration of strike slip movement of the fault in recent years. 4) The analysis of Bouguer gravity anomaly shows that the gravity differentiation on both sides of the fault is obvious, showing a characteristic differentiation state of low west and high east. This paper can be used as a reference for the deformation of crustal blocks, potential seismogenesis, earthquake grade and earthquake disaster prevention around the Jiangsu section of the Tan-Lu fault zone.
YU Teng,ZHU Yimin,ZHANG Peng et al. Characteristics of Jiangsu Segment of Tan-Lu Fault Zone and Its Adjacent Areas Revealed by Multi-Source Remote Sensing[J]. jgg, 2022, 42(6): 569-576.