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  姚大全,刘东旺,翟洪涛,童远林,沈小七,郑颖平,李光.安徽肥东桥头集南西第四纪断层活动习性[J].震灾防御技术,2009,4(3):308-311, DOI:10.11899/zzfy20090307.

安徽肥东桥头集南西第四纪断层活动习性
摘要:    肥东桥头集一带分布有北西走向第四纪断层,由于露头罕见,对其第四纪以来活动性所知甚少,为了探索其新活动性,作者近期对这一地区进行了详细的调查工作。在肥东桥头集南西上白垩统中发现了断层露头,通过现场详细调查编录、断层物质测龄和定向微观分析,对断层的活动期次、活动时代、活动性质和滑移特性等断层的活动习性进行了综合分析和研究。结果显示,晚更新世以来,所在地区曾发生过3次构造变动事件,活动时代分别距今(11.02±0.55)万年、(9.53±0.57)万年和(7.72±0.46)万年。活动性质以走滑为主,兼有张裂或挤压;滑移特性以粘滑为主,兼有蠕滑。
作者单位
姚大全 安徽省地震局合肥 230031 
刘东旺 安徽省地震局合肥 230031 
翟洪涛 安徽省地震局合肥 230031 
童远林 安徽省地震局合肥 230031 
沈小七 安徽省地震局合肥 230031 
郑颖平 安徽省地震局合肥 230031 
李光 安徽省地震局合肥 230031 
关  键  词:桥头集  晚第四纪  活动习性 热释光定年
DOI:10.11899/zzfy20090307
基金项目:地震行业科研专项(200808064)和安徽省科技攻关计划项目(08010302204)共同资助
收稿日期:2009-05-26
作者简介:姚大全,男,生于1956年。安徽省地震局研究员。主要从事地震地质、活动构造研究工作。E-mail:daquany@aheq.gov.cn
通讯作者:
Active Behavior of Quaternary Fault in Southwest Area of Qiaotouji, Feidong County, Anhui Province
Abstract:      Faults trending NW were distributed in Qiutouji, Feidong, it is not well know to activity since Quaternary because the fault outlooks are very rare. In order to research the new activity, detailed serving to the area was made recently , there were fault outlooks were found in Upper-Chalk, in southwest area of Qiaotouji, Feidong County, by means of the locale probing and recording detailed, dating to the fault’s materials, microscopic analyzing directionally to the fault’s materials, and the result reveals that three times tectonic deformation events had been taken in the research area since Later-Pleistocene, which is respectively (110.2±5.5), (95.3±5.7) and (77.2±4.6) thousand years from now, the shearing is main fault’s character, concurrently is tensile or compression, and the sliding behavior is mainly stick slip, between of them is creep slip.
Keywords:  Qiaotouji  Late-Pleistocene  Active behavior  Dating by Thermoluminescence
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