[1]PANG Wei,HE Wengui,ZHANG Bo.Preliminary Study of New Faulting Characteristic of the Linze Fault[J].Journal of Seismological Research,2019,42(01):120-132.
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Preliminary Study of New Faulting Characteristic of the Linze Fault
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
42
Number of periods:
2019 01
Page number:
120-132
Column:
Public date:
2019-04-20
- Title:
- Preliminary Study of New Faulting Characteristic of the Linze Fault
- Keywords:
- Linze fault; Yumushan fault zone; paleoearthquake; scarp shape; differential GPS surveying
- CLC:
- P315.242
- DOI:
- -
- Abstract:
- The Linze fault includes three fault scarps,of which the middle and east scarps facing east,while the west scarp facing west,mainly striking NNW direction with the length up to 8 km,have been discovered. ①Three fault scarp are measured in detail by differential GPS. The profiles show that the Linze fault scarps are much lower,and multi-level fault scarp are locally developed,with gentle slope angle and a height from tens of centimeters to one meter. ② Four trench profiles on Linze fault are selected for paleoseismic analysis,sample collection and dating. It is found that the fault scarps in the east and middle are controlled by normal faults,while the fault scarps in the west are controlled by reverse faults. ③Since late Late Pleistocene,four rupture events happened respectively before(8 895±125)a B.P.,(7 245±75)a B.P.～(6 190±20)a B.P.,(5 120±20)a B.P.～(4.8±0.5)ka and(2 550±50)a B. P.～(2 326±64)a. ④Three events can be identified since Holocene. The earlier one coincides with the earlier paleoearthquake event on the northern margin fault of Yumushan,which indicates that Linze fault may be the extension of Yumushan fault to the Hexi Corridor. The last paleoearthquake event elapsed about 2 500 a,which indicates that the Linze fault is active during Holocene.
- References:
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Last Update:
2019-04-25