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青海德令哈巴音郭勒河断裂带的新活动特征
引用本文:刘小龙,袁道阳. 青海德令哈巴音郭勒河断裂带的新活动特征[J]. 地震工程学报, 2004, 26(4): 303-308
作者姓名:刘小龙  袁道阳
作者单位:1. 中国地震局兰州地震研究所,甘肃,兰州,730000
2. 中国地震局兰州地震研究所,甘肃,兰州,730000;中国地震预测研究所兰州科技创新基地,甘肃,兰州,730000
基金项目:国家重点基础研究发展规划项目(G1998040701-04)资助,中国地震局兰州地震研究所论著编号:LC2003020.
摘    要:在青海德令哈巴音郭勒河北侧山前冲洪积扇上新发现了一条长约60km的逆断裂带,属于本区NNW-NWW向的柴达木盆地北缘活动断裂系内的一条次级挤压构造。断裂在地貌上表现为明显的挤压逆冲断层陡坎,晚更新世晚期以来的平均垂直滑动速率为0.41±0.27mm/a。探槽剖面确定了三次古地震事件,其年代分别为距今约32.7±1.45ka、15.54±1.32ka和3.2±0.33ka。

关 键 词:青海 巴音郭勒河活动断裂 新活动 滑动速率 古地震
文章编号:1000-0844(2004)04-0303-06
收稿时间:2003-06-24
修稿时间:2003-06-24

STUDY ON THE NEW ACTIVE FEATURES OF BAYINGUOLE RIVER ACTIVE FAULT, DELINGHA, QINGHAI PROVINCE
LIU Xiao-long and YUAN Dao-yang. STUDY ON THE NEW ACTIVE FEATURES OF BAYINGUOLE RIVER ACTIVE FAULT, DELINGHA, QINGHAI PROVINCE[J]. China Earthguake Engineering Journal, 2004, 26(4): 303-308
Authors:LIU Xiao-long and YUAN Dao-yang
Affiliation:LIU Xiao-long~1,YUAN Dao-yang~
Abstract:A new reverse fault zone,60 km long,was found on the alluvial and pluvial fan of the northern bank of Bayinguole river, Delingha, Qinghai Province. The fault is a sub-extrusion tectonics belongs to the northern margin of NNW-NWW oriented active fault system in Qaidam basin. Its tectonic geomorphology is characterized by clear linear fault scarps, the average vertical slip rate of the fault is about 0.41±0.27 mm/a since late period of the late Pleistocene. About three palaeo-earthquake events are found by trenching along the active fault zone, their ages are 32.7±1.45 ka, 15.54±1.32 ka and 3.2±0.335 ka, respectively.
Keywords:Qinghai province  Bayinguole river active fault  New activity  Slip rate  Palaeo-earthquake
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