| 惠安埔塘—青山断裂的活动特征 |
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| 引用本文： | 姚庆元,何昭星.惠安埔塘—青山断裂的活动特征[J].台湾海峡,1994,13(1):101-108. |
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| 作者姓名： | 姚庆元 何昭星 |
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| 作者单位： | 福建省地震局地震综合队!厦门361021 |
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| 摘 要： | 本文从构造，地貌和第四纪沉积学等研究了福建惠安埔－青山断裂活动特征，结果表明，该断裂的断层面具有新鲜擦痕，破劈理，有未固结的断层泥，角砾岩，断层两侧地貌面差异变形，有断层陡崖，三角面和跌水与瀑布；第四纪沉积层受构造扰动，发生拖曳和变形，经＾１４Ｃ年代测定认为，该断裂最新活动年代介于４２０００－２４０００ａ，Ｂ．Ｐ．间，断裂活动性质为兼具右旋水平错动的正断层（张扭性），平均垂直活动速率为２．１ｍｍ／
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| 关 键 词： | 断裂 活动特征 活动标志 福建 |
Active characteristics of Putang-Qingshan Fault in Hui'an, Fujian |
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| Yao Qingyuan andHe Zhaoxing.Active characteristics of Putang-Qingshan Fault in Hui''''an, Fujian[J].Journal of Oceanography In Taiwan Strait,1994,13(1):101-108. |
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| Authors: | Yao Qingyuan andHe Zhaoxing |
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| Abstract: | An active fault refers to a fault that has been moving recently and will continue to move in future,or that moved in the past and will move in future. A fault that has been active since 35 ka,B. P. is defined as an active fault by the United States Atomic Energy Commission and is accepted widely by the engineers in the world. This paper adopts this definition. The specific peculiarity of the Quaternary geology environments along the coast of Fujian Province makes it very difficult to study the active fault in the area. Based on the survey data,this paper studies preliminarily the macroscopic active signs and active characteristics in PutangQingshan active fault.The macroscopic signs in Putang-Qingshan active fault are as follows:1. Tectonic signs:It includes fault tectonic behaviors such as fresh scratches on the fault surface,mirror,steps,broken cleavage and,unsolidified fault' s mud and breccia.2. Geomorphic signs:They refer to the different deformation on the geomorphic surface in both sides of the fault,the microgeomorphology of the fault such as the fault scarps,the triangle surface,linn and the fall,etc..3. The Quaternary stratigraphical signs:The Quaternary sedimentary layer is interfered by the structure to produce dragging deformation and differential distribution of the Quaternary sediments.Based on the characteristics of the geomorphic surface displacement,the deformation of the Quaternary layer and 14C data,it proves preliminarily that the latest active fault was from 42 000 a to 24 000 a,and the average rate of vertical movement was of 2. 1 mm/a or so(Time limit 35 000 a). The fault,a normal fault with right rotation and displacement (the tensile torsion),gradually moved southward. |
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| Keywords: | Fault active characteristics macroscopic active signs Fujian |
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