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饶 峥,黎广荣,刘晓东,等. 塔木素高放废物预选区断层泥石英表面扫描电镜特征及断层活动性分析[J]. 科学技术与工程, 2020, 20(35): 14417-14424.
Rao Zheng,Liu Xiaodong,et al.SEM Characteristics of Surfaces of Quartz in the Fault Gouge and Fault Activity Analysis in the Pre-selected area of High Radioactive Waste in Tamusu[J].Science Technology and Engineering,2020,20(35):14417-14424.
塔木素高放废物预选区断层泥石英表面扫描电镜特征及断层活动性分析
SEM Characteristics of Surfaces of Quartz in the Fault Gouge and Fault Activity Analysis in the Pre-selected area of High Radioactive Waste in Tamusu
投稿时间:2019-12-26  修订日期:2020-08-29
DOI:
中文关键词:  断层泥  石英微形貌  活动时代  断层活动性
英文关键词:fault gouge  micro morphology of quartz  activity epoch  fault activity
基金项目:国防科技工业局[2014]1587号项目;江西省数字国土重点实验室开放基金项目(DLLJ201714)
                       
作者单位
饶 峥 东华理工大学
黎广荣 东华理工大学核资源与环境国家重点实验室
刘晓东 东华理工大学
刘平辉 东华理工大学
刘 帅 东华理工大学
王 超 东华理工大学
郭 超 东华理工大学
倪凤娟 东华理工大学
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中文摘要:
      断层泥是断层活动信息的良好载体,通过解析断层泥信息,可以对其活动时代及运动方式进行更深入的研究。本文利用扫描电镜(SEM)对塔木素研究区的塔木素断裂(F2)和那仁哈拉断裂(F7)断层泥的溶蚀微形貌和应力痕迹微形貌进行观察和分析。结果表明:(1)F2断裂断层泥石英微形貌主要为Ⅰa类、Ⅱ类和Ⅲ类,F7断裂断层泥石英微形貌主要为为Ⅰa类、Ⅰc类、Ⅱ类和Ⅲ类;(2)F2和F7断裂溶蚀微形貌显示两条断裂均经历了多期次的活动过程,F2断裂活动时间主要在晚更新世、早更新世早期和上新世,活动最强烈时期在早更新世早期,F7断裂活动主要在晚更新世、早更新世、上新世,活动最强烈时期在晚更新世,F2和F7断裂全新世至今基本没有活动。预选区断裂构造晚第四纪的活动性影响着有利地段的最终确定,而研究区断裂活动时代的研究对研究区未来地震发生趋势及危险分析无疑有重要的现实意义。
英文摘要:
      Fault gouge is a good carrier of fault activity information. Fault activity would be known via analyzing the fault gouge. In this paper, scanning electron microscopy (SEM) was used to observe and analyze the corroded micro morphology and stress trace of quartz of the fault gouges of Tamusu fracture (F2) and Narenhala fracture (F7) in the research area of Tamusu, Inner Mongolia. The results show that: (1) The micro morphology of quartz in fault gouge of F2 is mainly type Ia, type II and type III, while that in fault gouge of F7 is mainly type Ia, type Ic, type Ⅱ and type Ⅲ; (2) The corroded micro morphology of quartz surface of fault gouges of F2 and F7 shows that both faults have experienced multiple stages of activity. The activity time of F2 fault is mainly in late Pleistocene, early Pleistocene and Pliocene, the most active period is in early Pleistocene, the activity epoch of F7 fault is mainly in late Pleistocene, early Pleistocene and Pliocene, the most active period is in late Pleistocene, both F2 and F7 faults have not been active since Holocene. The activity of the faults in the Pre-selected area in the late Quaternary affects the final determination of the favorable area, and the study on the active epoch and movement mode of the faults in the research area is undoubtedly of great practical significance for the future earthquake risk analysis.
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