| 香山-天景山断裂活动时代的光释光测年 |
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| 引用本文： | 俞岗,尹功明,王旭龙. 香山-天景山断裂活动时代的光释光测年[J]. 华南地震, 2013, 0(4): 87-92 |
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| 作者姓名： | 俞岗 尹功明 王旭龙 |
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| 作者单位： | [1]中国地震局地质研究所,地震动力学国家重点实验室,北京100029 [2]广东省地震局,中国地震局地震监测与减灾技术重点实验室,广东广州510070 [3]中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,陕西西安710075 |
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| 基金项目： | 国家自然科学基金项目（40972118） 致谢：本文研究探槽剖面由宁夏地震局柴炽章研究员、焦德成研究员、杜鹏、雷启云等开挖,并允许我们进行年代学研究,在此表示衷心感谢. |
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| 摘 要： | 在青藏高原东北隅发育一系列向北东凸出的弧形断裂带．其中最主要的三条断裂带从北到南分别为牛首山-罗山断裂带、香山-天景山断裂带和天祝一海原断裂带。香山-天景山断裂带从上世新以来一直有过活动，并在1709年发生了中卫南7t／2级地震。近期，宁夏地震局在孟家湾村南开挖了一个探槽．揭露出石炭纪的煤系地层逆冲于晚更新世风成沙之上．根据风成沙光释光测年结果表明。此探槽显示的断裂活动时代在距今约26．14±1．08ka．极有可能为22．09±0．4ka与26．14±1．08ka之间．
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| 关 键 词： | 香山-天景山断裂 光释光测年 古地震 |
Optical Dating of The Xiangshan-Tianjingshan Fault |
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| YU Gang,YIN Gongming,WANG Xulong. Optical Dating of The Xiangshan-Tianjingshan Fault[J]. South China Journal of Seismology, 2013, 0(4): 87-92 |
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| Authors: | YU Gang YIN Gongming WANG Xulong |
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| Affiliation: | 1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China; 2. Earthquake Administration of Guangdong Province, Key Laboratory of Earthquake Monitoring and Disaster Mitigation Technology, CEA ,Guangzhou 510070, China ; 3. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi＇an 710075, China) |
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| Abstract: | There are a series of northeast forward are faults in the northeast corner of the Tibetan plateau. From south to north, there are three important faults, which is Niushoushan-Luoshan fault, Xiangshan-Tianjingshan fault and Tianzhu-Haiyuan fault. Earthquakes have been occurring on Xiangshan-Tianjingshan fault since Pliocene, and Zhongwei M71/2 earthquake occurred in 1709 on this fault. But most earthquakes occurred during Holocene. Recently, seismological bureau of Ningxia Hui autonomous region dug a trench in the south of Mengjiawan village. The trench reveals that Carboniferous coal measure strata thrusted onto late Pleistocene aeolian sand. According to the result of optical stimulated luminescence dating method, this trench reveals that the active time of the fault is about 26.14±1.08ka BP, especially between 22.09±0.4ka BP and 26.14± 1.08ka. |
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| Keywords: | Xiangshan-Tianjingshan fault OSL dating Paleoearthquake |
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