吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (5): 1362-1375.doi: 10.13278/j.cnki.jjuese.20170318
雷东宁1,2, 乔岳强1,2, 胡庆1,2, 王秋良3, 林松1,2, 李雪1
Lei Dongning1,2, Qiao Yueqiang1,2, Hu Qing1,2, Wang Qiuliang3, Lin Song1,2, Li Xue1
摘要: 丹江口地区地震地质因修建丹江水库而得到深入研究,但针对断裂进行的系统性研究较少。通过对丹江断裂东段进行1:1万大比例条带状活动断裂填图,综合采用地质地貌调查、岩样年龄测试、地质钻探、浅层地震勘探等多种手段进行研究,认为:1)丹江断裂东段第四纪以来累积左旋走滑量在250~500 m之间,上更新统地层垂直断距为10~20 m;2)断裂最新活动时代为晚更新世,活动性质以由NE向SW的逆冲为主,兼具有左旋走滑分量;3)断裂活动性由山地向盆地迁移。丹江断裂晚更新世以来活动表明,南襄盆地西缘活动性较强。该认识可为进一步评估丹江口地区乃至南襄盆地西缘的地震构造环境提供依据。
中图分类号:
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