青海省玛沁县军功断裂(拉加段)几何特征及活动性探究  

A study on the geometric characteristics and activity of the Jungong Fault(Laga Section)in Maqin County,Qinghai Province

作　　者：刘祥 贾志泉 骆志红 窦增宁 LIU Xiang;JIA Zhiquan;LUO Zhihong;DOU Zengning(The 3rd Geological Brigade of Sichuan,Chengdu 611700,Sichuan,China;Qinghai Transportation Planning and Design Institute Co.,Ltd.,Xining 810008,Qinghai,China)

机构地区：[1]四川省地质局第三地质大队,四川成都611700 [2]青海省交通规划设计研究院有限公司,青海西宁810008

出　　处：《矿产勘查》2024年第S2期376-381,共6页Mineral Exploration

摘　　要：军功断裂整体倾向北西40°~50°,倾角45°左右,在拉加镇附近被2条次级断裂错断,断层中段向南西突出,2条次级断裂以走滑特征显著。随着拉加地区大型工程建设需求,查明其几何特征及活动性具有深远意义。笔者根据军功断裂未切割上覆第四系黄土,采集2组相关光释光测年样品,样品年龄为(64.0±3.3)ka、(47.0±4.5)ka,初步厘定了军功断裂在晚更新世之后未发生过活动,并初步探究军功断裂(拉加段)形成机制。The overall inclination of the Jungong Fault is 40°-50°northwest,with an inclination angle of 45°±.It is intersected by two secondary faults near Lajia Town,with the middle section of the fault protruding southwestward.The two secondary faults exhibit significant strike slip characteristics.With the demand for large-scale engineering construction in the Laga region,identifying its geometric characteristics and activity has profound significance.The author collected two sets of related photoluminescence dating samples based on the uncut Quaternary loess overlying the Jungong fault,with ages of(64.0±3.3)ka and(47.0±4.5)ka,and preliminarily determined that the Jungong fault did not experience activity after the Late Pleistocene.And preliminarily explore the formation mechanism of Jungong Fault(Laga section).

关 键 词：军功断裂 几何特征 活动性 光释光测年 

分 类 号：P546[天文地球—构造地质学]