生长地层及其在判断天山北缘前陆冲断褶皱带形成时间上的应用  

Growth strata and their application in timing deformation of foreland thrust-fold belts in the north margin of Tianshan

作　　者：郭召杰[1] 方世虎[1] 张锐[1] 张志诚[1] 吴朝东[1] 邵奎政[2] 

机构地区：[1]北京大学造山带与地壳演化教育部重点实验室,北京100871 [2]中国石油天然气股份有限公司大庆油田有限责任公司勘探分公司,黑龙江大庆163000

出　　处：《石油与天然气地质》2006年第4期475-481,共7页Oil & Gas Geology

基　　金：国家重点基础研究发展规划项目(2001CB409804)课题资助

摘　　要：新生代以来天山北缘前陆冲断褶皱带自南向北可分为山麓冲断褶皱带、霍尔果斯-玛纳斯-吐谷鲁冲断褶皱带、独山子-安集海冲断褶皱带3排构造带。在野外观察的基础上，结合地震剖面分析，确定了各排构造带生长地层发育层序；结合裂变径迹年龄证据，并根据现有磁性地层等年代学资料，确定了天山北缘晚新生代构造变形时间序列：第一排构造带形成于距今10Ma以来；第二排构造带形成于距今7～2．58Ma以来；第三排构造带形成于距今大约0．73Ma后。Three foreland thrust-fold belts, the Piedmont, the Huoerguosi-Manasi-Tugulu, and the Dushanzi-Anjihai, formed since the Cenozoic are recognized from south to north in the north margin of Tianshan. The sequences of growth strata developed in each belt have been established based on field observation and seismic interpretations. The fission-track dating evidences and available magnetostratigraphic data are also used in the timing of the Late Cenozoic tectonic deformation： the Piedmont formed since about 10 Ma; the Huoerguosi-Manasi- Tugulu formed from 7 to 2. 58 Ma; and the Dushanzi-Anjihai formed after about 0. 73 Ma.

关 键 词：生长地层 冲断褶皱带 形成时间 天山北缘 晚新生代 

分 类 号：TE122.1[石油与天然气工程—油气勘探]