应用断点移动法分析断层活动性  

Fault Activity Analysis by Breakpoint Moving Method

作　　者：张津宁[1,2] 张金功[1,2] 杨乾政 吴春燕[1,2] 黄传卿[4] 崔强[1,2] 

机构地区：[1]西北大学大陆动力学国家重点实验室,西安710021 [2]西北大学地质学系,西安710069 [3]中国石油青海油田分公司勘探开发研究院,甘肃郭煌736202 [4]陕西科技大学化学与化工学院,西安710021

出　　处：《地质科技情报》2016年第1期38-43,共6页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41302076;41372129);中国地质调查局"非常规能源矿产调查评价"基础地质调查计划项目(12120113040700);中国石油天然气股份有限公司青海油田分公司科技项目(研究院2013-技术-勘探-10)

摘　　要：利用断点移动法可以定量分析断层活动性。断点移动法从断点移动距离、断点移动速率和断点移动角度3个方面综合分析断层活动性,具有精确表征断层在不同时期和不同部位的活动性、定位断层运动方向、判断断层活动类型和可操作性强等优点。运用断点移动法对柴达木盆地阿拉尔断层的活动性进行了精细解剖,阿拉尔断层各部位垂向移动距离和横向移动距离存在明显的差异性;断层活动强度在晚渐新世(E^2_3)及晚上新世(N^3_2)最大,中上新世(N^2_2)为活动最弱期;构造演化过程中,阿拉尔断层西部为高角度断层向低角度断层演化,断层中部和东部为低角度断层向高角度断层演化。This paper presents quantitative analysis for fault activity with breakpoint moving method. Com- prehensive analysis is made on the fault activity from breakpoint moving distance, breakpoint moving rate and breakpoint moving angle by breakpoint moving method. This method is easy to operate and can derive precise representative fault activity in different periods and different parts, locate the fault direction and judge fault activity types. In the practical application, the breakpoint moving method is used to anatomize activity of Alar fault in Qaidam Basin, which was evidently different invertical movement distance and lat- eral movement distance in the E2/3 and N3/2 period, the fault activity intensity was the maximum, but it was minimum in the N2/2 period. In the process of tectonic evolution, high angle fault was translated into low angle fault in the west of Alar fault, while the low angle fault was transformed into high angle fault in the middle and east of Alar fault.

关 键 词：断点移动法 断层活动性 柴达木盆地 阿拉尔断层 油气勘探 

分 类 号：P542.3[天文地球—构造地质学]