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世界地质 2021, 40(2) 307-318 DOI: ISSN: 1004-5589 CN: 22-1111/P

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	内蒙古
	水泉子沟—天山口断裂带
	断层泥
	石英颗粒
	微形貌特征
	断层活动
	本文作者相关文章
	朱彤
	李本仙
	李耀宗
	孟杰
	刘晓旸
	费渴心
	PubMed
	Article by Zhu T
	Article by Li B
	Article by Li Y
	Article by Meng J
	Article by Liu X
	Article by Fei K

活动断裂带断层泥中石英颗粒表面微形貌特征:以内蒙古水泉子沟—天山口断裂带为例

朱彤, 李本仙, 李耀宗, 孟杰, 刘晓旸, 费渴心

1 吉林大学地球科学学院, 长春130061; 2 吉林省地质调查院九分院, 长春130102; 3 平煤神马建工集团有限公司, 河南平顶山467000; 4 哈尔滨师范大学地理科学学院, 哈尔滨150025; 5 吉林大学无机合成与制备化学国家重点实验室, 长春130012

摘要：以水泉子沟—天山口断裂带杨树林剖面为研究对象, 利用扫描电镜分析技术( SEM) 对从该剖面野外采集的断层泥样品中分离出来的石英颗粒进行微观形貌研究, 进而对石英颗粒的微形貌类型进行识别分类和统计分析, 估算断层活动的相对时间; 同时利用模糊数学方法确定了断层的活动方式?结果表明, 断层活动始于早更新世, 经历过多期次活动, 直至全新世仍具有一定的活动性?依据横向上断层活动年代由新到老的趋势, 推测断层上盘为主动盘, 断层泥的发育方向为由下盘到上盘?断层的活动方式以黏滑为主, 蠕滑表现较弱, 是与地震活动有关的活动断裂?

关键词：内蒙古水泉子沟—天山口断裂带断层泥石英颗粒微形貌特征断层活动

Micro?morphological characteristics of quartz grains surface in fault gouge of active fault zone: taking Shuiquanzigou- Tianshankou fault zone in Inner Mongolia as an example

ZHU Tong, LI Ben?xian, LI Yao-zong, MENG Jie4, LIU Xiao-yang, FEI Ke?xin

1 College of Earth Sciences, Jilin University, Changchun 130061, China; 2 Ninth Branch, Geological Survey of Jilin Province, Changchun 130102, China; 3 Pingmei Shenma Jiangong Group Co?? Ltd??, Pingdingshan 467000, Henan, China; 4 College of Geography Sciences, Harbin Normal University, Harbin 150025, China; 5 State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Changchun 130012, China

Abstract: The micro?morphological characteristics of quartz grains isolated from fault gouge samples collected in the Yangshulin profile of Shuiquanzigou -Tianshankou fault zone were studied by scanning electron microscopy(SEM). The micro - morphological types of quartz grains were identified, classified and statistically analyzed to estimate the relative time of fault activity. Meanwhile, the activity mode of the fault was identified by fuzzy mathematical method. The results show that fault activity began in the Early Pleistocene and experienced many stages of activity until the Holocene. According to the lateral tendency of the age of fault activity from new to old, it is inferred that the hanging wall of the fault was the main moving side, and the development direction of fault gouge was from the footwall to hanging wall. The movement mode of fault was mainly stick?slip, and the creep - slip was weak, it was an active fault related to earthquake.

Keywords: Inner Mongolia Shuiquanzigou-Tianshankou fault zone fault gouge quartz grains micro?mor?phological characteristics fault activity

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