塔里木克拉通内盆地走滑断层构造解析  

Structural analysis of strike-slip faults in the Tarim intracratonic basin

作　　者：杨海军[1] 邬光辉[2] 韩剑发[1] 苏洲[1] Yang Haijun;Wu Guanghui;Han Jianfa;Su Zhou(Tarim Oilfield Company,PetroChina,Kuerle,Xinjiang841000;Southwest Petroleum University,Chengdu610500)

机构地区：[1]中国石油塔里木油田分公司,新疆库尔勒841000 [2]西南石油大学,成都510600

出　　处：《地质科学》2020年第1期1-16,共16页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家科技重大专项(编号:2017ZX05008-004-001,2017ZX05001-001)和中国石油股份公司重大专项(编号:2018E-1806)资助。

摘　　要：针对塔里木盆地超深地震资料品质差、小位移走滑断层识别与解释难,结合地震剖面建模与地震平面属性识别,开展区域构造解释成图与构造解析。结果表明,塔里木克拉通内发育北东向与北西向走滑断层,并发育多种典型走滑构造,分布面积达5X105/,构成环满西大型统一走滑断层系统。环满西走滑断层系统具有分区、分级、分层、分类与分段的差异性,形成塔北、满西与塔中3个分区,4级规模断层;走滑断层主要以压扭为主分布在下古生界碳酸盐岩中,志留系一泥盆系、石炭一二叠系、中生界一古近系有张扭继承性活动;大型走滑断层沿走向具有分段性。综合分析,环满西走滑断层系统形成于中-晚加里东期,加里东末一早海西期、晚海西期和燕山一喜玛拉雅早期等有继承性活动;走滑断层演化具有继承性与改造性,连接生长是形成小位移、超长陆内走滑断层带的主要机制。本研究为复杂断裂构造研究提供了新思路。Due to the difficulty to identify small displacement strike-slip faults by low quality seismic data in the deep subsurface,fault mapping by seismic sections and horizontal seismic attributes is used to structural analysis of the strike-slip faults in the Tarim Basin.It is showed that there is a large circum-Manxi strike-slip fault system in the central Tarim,covered 5×104 km2 with NE and NW strike fault network.There are five type styles and eight kinds of typical strike-slip structures identified from seismic data.The strike-slip faults are divided into three areas of Tazhong,Manxi and Tabei from south to north,and divided into four classes according to the size of the fault.The strike-slip faults are mainly distributed in the Lower Paleozoic carbonates with dominated transcompressional faults,and inherited reactivations in Silurian-Devonian,Carboniferous-Permian and Mesozoic-Paleogene with transtensional faults.Large strike-slip faults are characterized by distinct segmentation.The strike-slip fault system formed in the Middle-Late Caledonian Period,and there were inherited reactivations in the End Caledonian-Early Hercynian Period,Late Hercynian Period and Yanshanian-Early Himalayan Period,following multiple inheritance and remodification.The linkage growth is the main mechanism for the formation of the small displacement and long length strike-slip fault zones.This study provides a new insight for the study of complicated structure in the sedimentary basin.

关 键 词：走滑断层 识别 构造解析 几何学 分布 演化 机制 

分 类 号：P542[天文地球—构造地质学]