| Institute of Geomechanics, Chinese Academy of Geological Sciences | Host |
| Citation: |
ZONG Kai-hong, ZONG Wen, KANG Cong-xuan, BAI Shi-biao. RESEARCH ON THE MAJOR ACTIVE FAULTS IN ZHENJIANG, JIANGSU AND THEIR LATE QUATERNARY ACTIVITIES[J]. Journal of Geomechanics, 2016, 22(3): 439-453.
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RESEARCH ON THE MAJOR ACTIVE FAULTS IN ZHENJIANG, JIANGSU AND THEIR LATE QUATERNARY ACTIVITIES
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Abstract
Combined with a series of measures from geophysical exploration, drilling and trench, through surveying the geomorphology and interpreting the remote sensing image at Zhenjiang, Jiangsu province, we discussed the age of Quaternary strata at both sides of Zhenjiang fault, then confirmed the activity mechanism and activity time of the fault. Research showed that the faults formed in different periods divided by directions include NE-NEE, NW, nearly EW, nearly NS and strike thrust (eversed) faults associated with fold, etc. Strike thrust (eversed) faults and early nearly EW trending faults formed in the late Indosinian to early Yanshanian fold orogenesis, NE-NNE trending and NW trending faults are the largest faults, formed mainly in Yanshan regional fault blockperiod. Nearly SN and late nearly EW trending tectonics controlled the spacial distribution of the Cenozoic sedimentary depression, which formed in late Yanshanianto Himalayan period. The faults that have inheritance activities include Mufushan-jiaoshan fault, Maoshan fault (belt) and fault along the river since the Quaternary, they are the main fault tectonics to Shape the modern landscape. Combining the regularity of seismic occurrence at Zhenjiang region with the charactristics of stress field, we consider the last activity time of the fault tectonics in Zhenjiang region is Pleistocene, activity is weak at Holocene, and then tends to be stable.
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References
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ZONG Kai-hong, ZONG Wen, KANG Cong-xuan, BAI Shi-biao. RESEARCH ON THE MAJOR ACTIVE FAULTS IN ZHENJIANG, JIANGSU AND THEIR LATE QUATERNARY ACTIVITIES[J]. Journal of Geomechanics, 2016, 22(3): 439-453.
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Figure 1.
Earthquake belts in Zhenjiang and adjacent areas
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Figure 2.
Epicenter distribution of the earthquakes in Zhenjiang and adjacent areas
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Figure 3.
Distribution of the main faults (including active faults) in Zhenjiang area
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Figure 4.
Photos showing the characteristics of the Mifushan-Jiaoshan fault
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Figure 5.
Drilling geological profiles in the Mufushan-Jiaoshan fault (F11)
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Figure 6.
Drilling profiles in Shiyezhou-Chaofengshan area
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Figure 7.
Ultrasonic CT scanning image and interpretation
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Figure 8.
Gravity Bouguer anomaly contour map and inferred Maoshan fault
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Figure 9.
CSAMT inversion resistivity section and geological interpretation of Shangdang-120 Line
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Figure 10.
CSAMT inversion resistivity section and geological interpretation of Shanghui-100 Line
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Figure 11.
Quaternary differential sedimentary characteristics of the drilling profiles in both sides of Maoshan fault
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Figure 12.
The inferred fault according to 1:50000 aeromagnetic anomaly contour
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Figure 13.
A residual gravity anomaly map in Chuanshan area
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Figure 14.
A gravity horizontal modulus map in Chuanshan area
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Figure 15.
A resistivity slice map in the depth of 1000 m in Dalu Town, Zhenjiang New Area
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Figure 16.
Quaternary drilling profiles in Xitang-Zhuliang Village