东昆仑断裂带东段玛曲断裂新活动特征及全新世滑动速率研究

Abstract

Abstract: The East Kunlun active fault is an important NWW-trending boundary fault on the northeastern margin of the Qinghai-Tibet Plateau. Maqu Fault is the easternmost segment of the East Kunlun active fault. Based on the field investigation, the activity along the Maqu fault since Holocene has been characterized by left-lateral (sinistral) strike-slip and normal slide faulting. The characteristics of dislocation geomorphology are obvious. The fault runs through the Maqu County, and then extends to east along the southern side of Heihe River and through the Ruoergai Grassland, and the end of Maqu fault reaches Qiuji on northern sides of the Minshan Mountain. Moreover, based on measurement of geomorphologic offset at the two sites by Total Station Instrument and the sample dating, the authors discussed new activity of Maqu fault and slip rate since Holocene. The average rate of horizontal displacement is calculated as 6.29~5.71 mm/a since early stage of Holocene and 4.19~4.03 mm/a since late stage of Holocene, respectively.

Key words: The Eastern Kunlun Active Fault, Maqu fault, Slip Rate, Active Fault, Qinghai-Tibet Plateau

CLC Number:

P546

HE Wen-gui, YUAN Dao-yang, XIONG Zhen, GE Wei-peng, LIU Xing-wang. Study on characteristics of new activity and Holocene slip rate along Maqu fault of East Kunlun Active Fault[J]. EARTHQUAKE, 2006, 26(4): 67-75.

References

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Study on characteristics of new activity and Holocene slip rate along Maqu fault of East Kunlun Active Fault

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