秭归盆地东缘断裂构造觅踪——再论仙女山断裂带北延过长江问题

文章在概略介绍仙女山断裂带所处的大地构造位置、展布特征、组合关系基础上,用详实的材料,逐一分析了荒口—腰店子、腰店子—将军垭、将军垭—卜庄河及尹家湾—黄垭畔、黄垭畔—贾家店长江南北两岸各段的断裂构造形迹特征、力学性质和交切关系。认为仙女山断裂带已北延过长江,并建议对断裂的应力传递方式和可能出现的史前地震进行深入研究。

SEEKING FOR EAST BOUNDARY FAULT STRUCTURE AT ZIGUI BASIN: A FURTHER DISCUSSION ON NORTHWARD EXTENSION THROUGH YANGTZE RIVER OF THE XIANNUSHAN FAULT ZONE

Xiannushan fault zone is one of the regional fault structures at western Hubei province. It is notable to dispute its northward extension through the Yangtze River.On the basis of a brief introduction to the tectonic locations, extension features and combinations of the fault zone, this paper, with its detailed materials, successively analyzes the fault structure trace features, mechanical properties and intersections in every segment on the north and south banks of Yangtze River, i.e. the segments of Huangkou--Yaodianzi, Yaodianzi--Jiangjuya, Jiangyunya--Buzhuanghe, Yinjiawan- Huangyapan and Huangyapan--Jiajiadian. It is thought that the Xian nushan zone had already extended northward through the Yangtze River, and suggested that a further investigation on the manner of stress transmission of the fault and the prehistoric earthquake occurred possibly.