滇东北会泽—者海断裂晚第四纪活动特征

The Quaternary activity characteristics of the Huize—Zhehai fault in the Northeast area of Yunnan

摘要: 会泽—者海断裂位于川滇交界地点，总体走向NEE，倾向NW，倾角60°—80°。本文通过卫星影像解译、地形地貌、断错地层及探槽开挖等对断裂的空间展布和活动性进行详细的调查研究。研究表明：会泽—者海断裂晚第四纪活动较强烈，该断裂控制着会泽、者海等第四纪盆地的发展及演化。根据探槽剖面和样品年代测试，揭露了一次古地震事件，最新一次古地震事件的时间应该在（12190±30）—（13730±40）a.B.P.之间。

Abstract: The Huize—Zhehai fault is located at the junction of Sichuan and Yunnan. It strikes NEE with trend of NW and inclination angle of 60°—80°. On basis of analysis of satellite image interpretation, geological section, dislocation formation and trench etc, we analyzed and researched the exhibition and activity of Huize—Zhehai fault. The last Pleistocene activity of Huize—Zhehai fault is relative strong. Huize—Zhehai fault controls the development and evolution of Huize—Zhehai, Zhehai, etc. According to the trench profile and sample dating, we found one earthquake event. The latest of earthquake event is between （12 190±30） and （13 730±40） a.B.P.