A Study of the Tectonic Activity of Shenzhen Fracture Zone
Received date: 2006-10-23
Revised date: 2007-01-19
Online published: 2007-03-10
From the structural geology, Remote Sensing Images，seismology，geomorphology and geodynamics, this paper introduces the geological structure background of Shenzhen and its adjacent, the tectonic movement of Shenzhen fracture zone is discussed. We believe that the Shenzhen fracture zone had no perceptible activities since late Pleistocene by fault profiles and fault material; micro earthquakes occurred frequently along this fault segment and foci of quite a few minor shocks detected were located to fall at different depths well within the fault zone, This means the fault is in a stage of action. Based on the actually measured nature stress data of Shenzhen, we find the value of maximum principal stress is small and direction of it is NW, vertical direction of fault. Such a stress state is too low to trigger sudden movement of the fault. The conclusion we reached is Shenzhen fracture zone is in a relative stable state now, modern microearthquakes are the representation of it releasing its tectonic energy slowly, and no sudden large movement of the fault would be expected.
Key words： Shenzhen fracture zone; Tectonic movement; Microearthquakes; Stable state.
SUN Jie, JIA Jian-ye, ZHAN Wen-huan, YI Shun-min . A Study of the Tectonic Activity of Shenzhen Fracture Zone[J]. Advances in Earth Science, 2007 , 22(3) : 234 -240 . DOI: 10.11867/j.issn.1001-8166.2007.03.0234
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