| 青海德令哈巴音郭勒河断裂带的新活动特征 |
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| 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].西北地震学报,2004,26(4):303-308. |
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| 作者姓名： | 刘小龙 袁道阳 |
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| 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 |
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| 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. |
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| 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。
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| 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： | 2003/6/24 0:00:00 |
| 修稿时间： | 2003年6月24日 |
STUDY ON THE NEW ACTIVE FEATURES OF BAYINGUOLE RIVER ACTIVE FAULT, DELINGHA, QINGHAI PROVINCE |
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| LIU Xiao-long and YUAN Dao-yang.STUDY ON THE NEW ACTIVE FEATURES OF BAYINGUOLE RIVER ACTIVE FAULT, DELINGHA, QINGHAI PROVINCE[J].Northwestern Seismological Journal,2004,26(4):303-308. |
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| Authors: | LIU Xiao-long and YUAN Dao-yang |
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| Institution: | LIU Xiao-long~1,YUAN Dao-yang~ |
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| 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. |
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| Keywords: | Qinghai province Bayinguole river active fault New activity Slip rate Palaeo-earthquake |
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