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Map showing the exploration trench with a photograph (a) and a geological interpretation section of the Chengnanhe fault (b), where (1) is the residual slope deposit, (2) the Late Pleistocene sandy soil, (3) granite gneiss, (4) Fault and (5) the TL sampling point.
Figures of the Article
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Structural sketch of the Penglai-Weihai fault zone. The pentagrams are the locations of the 1548 Bohai earthquake with magnitude larger than 7 (7≤M<8). The green circles represent the locations of with magnitude 6 (6≤M<7), and the northwest sea of Weihai M6 earthquake are marked in the figure. The red circle represents the locations of event with magnitude 5 (5≤M<6), and the blue circles represent the earthquake locations of magnitude 4 (4≤M<5). The red lines represent the locations of faults and the black box indicates the study area. F1: Shendaokou fault; F2: Chengnanhe fault; F3: Taocun-Dongdoushan fault; F4: Dazhudao-Weihaibei fault, F5: Haiyang fault
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Maps showing tectonics in the Weihai urban area, with legends including 1: Boundary of geological blocks, 2: Holocene, 3: Upper Pleistocene, 4: Lower Proterozoic-Archean Diorite, 5: Shendaokou fault (F1) and Chengnanhe fault (F2), 6: High-density electrical method detection profile and serial number, 7: Shallow seismic profile and serial number, 8: Geologic section of boreholes and serial number, 9: Exploration trench and serial number, and 10: The location of villages.
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Sketch map of the survey lines. 1: Chengnanhe fault, 2: electrical resistivity imaging profile (N4), 3: shallow seismic profile, 4: geologic section of boreholes, 5: drill hole and serial number, 6: exploration trench, 7: the line of fault-crossing leveling at Weihai No. 9 Middle School, and 8: the observation point on the line of fault-crossing leveling and serial number.
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Shallow seismic profile across the Chengnanhe fault (red lines) (a) and interpreted depth section (b)
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Electrical resistivity imaging profile of the Chengnanhe fault. The thickness of the overburden sediments is about 20 m. The sediments have relatively low resistivity, whereas the basement is characterized by high resistivity. The F2 represents the Chengnanhe Fault
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The geologic section of boreholes from ZK1, ZK3 to Zk4, where six layers can be determined by (1) the Miscellaneous fill, (2) silt clay (The black triangle denotes TL sampling point), (3) silt soil, (4) fully weathered granite gneiss, (5) strong weathered granite gneiss, and (6) moderately weathered granite gneiss, respectively.
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Map showing the exploration trench with a photograph (a) and a geological interpretation section of the Chengnanhe fault (b), where (1) is the residual slope deposit, (2) the Late Pleistocene sandy soil, (3) granite gneiss, (4) Fault and (5) the TL sampling point.
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Map showing the altitude difference data of fault- crossing leveling in Weihai No. 9 Middle School.
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