ESTIMATION OF MAJOR EARTHQUAKE CYCLE AND FUTURE TENDENCY IN HEXI CORRIDOR AND ITS ADJACENT AREA, NW CHINACHEN

CHEN Bai-lin; LIU Jian-sheng; ZHANG Yong-shuang; LIU Jian-min; DONG Cheng; WU Nai-fen

Volume 16 Issue 2

Jun. 2010

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Article Navigation > Journal of Geomechanics > 2010 > 16(2): 159-175

CHEN Bai-lin, LIU Jian-sheng, ZHANG Yong-shuang, et al., 2010. ESTIMATION OF MAJOR EARTHQUAKE CYCLE AND FUTURE TENDENCY IN HEXI CORRIDOR AND ITS ADJACENT AREA, NW CHINACHEN. Journal of Geomechanics, 16 (2): 159-175.

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ESTIMATION OF MAJOR EARTHQUAKE CYCLE AND FUTURE TENDENCY IN HEXI CORRIDOR AND ITS ADJACENT AREA, NW CHINACHEN

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Lanzhou Institute of Seimology, CSB, Lanzhou 730000, China

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Received: 2010-05-05
Published: 2010-06-01

Abstract

Abstract

The Hexi corridor, with its particular geographical position, is an important line connecting middle and lower reaches of the Yellow River and NW China. Affected by the late Mesozoic-early Cenozoic collision between Indian Plate and Eurasian Plate and the continuous northward compression the Hexi corridor and its adjacent area occur as a strong Crustal movement zone, as marked by earthquakes. Since 1555AD, two active periods and two quiet periods have been recognized and now is in the second active period since 1920. The second active period in the past 100 years can be divide to five active stages and five quiet stagese, each lasting for 9~16 years, and now is in the last active stage since 2002. Study of major earthquake cycle indicates that the major earthquakes (M_S=7.0~7.5) happen at the interval of 2000~3000 years in the study area. According to the state of every active fault in the recent earthquake, it can be predicted that in the coming 100 years the M_S>7.0 earthquakes most likely appear in San'gedun-Songshan area of Changma active fault zone, Yuemen area in west part of the Northern Qilianshan fault zone, the Ciyaokou-Kushuigou area in the middle part of Northern Qilianshan fault zone and Jiayuguan area of the Jiayuguan active fault, and likely in Shibaocheng-Changmadaba area in eastern part of Altyu tagh active fault and Gaotai area of Gaotaichezhan active fault. The authors suggest that more attention should be paid to active fault and major earthquake cycle in the study related to earthquake movement.
- active fault,
- period of major earthquake,
- future tendency of earthquake,
- Hexi corridor and its adjacent area

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References(43)

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