| 西藏东南部嘉黎断裂新知 |
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| 引用本文： | 任金卫,沈军,曹忠权.西藏东南部嘉黎断裂新知[J].地震地质,2000,22(4):344-350. |
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| 作者姓名： | 任金卫 沈军 曹忠权 |
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| 作者单位： | 中国地震局地质研究所!北京100029(任金卫，沈军，汪一鹏)，西藏自治区地震局!拉萨850000(曹忠权) |
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| 基金项目： | 攀登项目!“现代地壳运动与地球动力学研究”;; 地震科学联合基金!( 1980 15);; 人事部留学回国人员科技活动择优资助配套项目资助 |
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| 摘 要： | 野外调查表明 ,西藏东南部的嘉黎断裂带从那曲到嘉黎由三段呈雁行排列 ,大致沿N60°W方向延伸 ,其东南段在波密附近向南转折 ,沿贡日嘎布曲向南南东过上察隅和下察隅后转为近南北向延入缅甸境内与什阶断裂相连。嘉黎断层全新世以来活动性不强 ,其第四纪以来的平均滑动速率约为 4mm/a。一个有趣的现象是 ,虽然总体上嘉黎断裂的新活动不强 ,但在局部与张性盆地相邻的地段表现出较强的活动性 ,在这些段上沿断裂发育晚第四纪地表破裂 ,横跨断层的冲沟和河流被错断 ,其晚第四纪以来的平均滑动速率达到 15mm/a。但是这种现象的存在只局限在盆地中 ,盆地以外则截然终止 ,不复存在。从上述事实看 ,嘉黎断裂的走滑活动似乎是伴随张性活动而产生的 ,在断层几何和活动特征上类似于横切大洋中脊的转换断
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| 关 键 词： | 嘉黎断裂 滑动速率 青藏高原 |
QUATERNARY FAULTING OF JIALI FAULT, SOUTHEAST TIBETAN PLATEAU |
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| Ren Jinwei Shen Jun Cao Zhongquan Wang Yipeng Institute of Geology,China Seismological Bureau,Beijing Seismological Bureau of Tibet Autonomous Region,Lhasa.QUATERNARY FAULTING OF JIALI FAULT, SOUTHEAST TIBETAN PLATEAU[J].Seismology and Geology,2000,22(4):344-350. |
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| Authors: | Ren Jinwei Shen Jun Cao Zhongquan Wang Yipeng Institute of Geology China Seismological Bureau Beijing Seismological Bureau of Tibet Autonomous Region Lhasa |
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| Institution: | Ren Jinwei 1) Shen Jun 1) Cao Zhongquan 2) Wang Yipeng 1) 1) Institute of Geology,China Seismological Bureau,Beijing 100029 2) Seismological Bureau of Tibet Autonomous Region,Lhasa 850000 |
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| Abstract: | The Jiali fault is one of the major faults in the southeastern Tibetan Plateau. A field investigation of this fault has been made recently. From Naqu to Jiali the fault extends roughly in N60°W direction and consists of three segments arranged in an en echelon way. From Luoermano to Esukongma (about 40km) where the fault is the northern boundary of the Sangdi basin that extends north south, late Quaternary surface ruptures have been found. Within this segment the creeks and gullies that cross the fault w |
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| Keywords: | Jiali fault Slip rate Tibetan Plateau |
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