地质学报2017，Vol.91Issue(3)：510-522,13.
西天山白垩纪隆升-剥露的裂变径迹证据
Cretaceous Uplifting-Exhumation Process of West Tianshan:Evidence from Apatite Fission Track
摘要
Abstract
Cretaceous uplifting-exhumation events occurred widely in different tectonic units in Xinjiang.Apatite fission tract dating and thermal history modeling were carried out on 17 granite samples collected from the Boluokelu mountain,Yilianhabierga mountain and Duku road to investigate the uplifting-exhumation processes of mountains.The studying areas include the northern part and middle part of West Tianshan.Fission-track ages for these samples range from (81.6 ± 4.9) to (45.4± 3.2) Ma with mean track lengths varying from (12.62±0.17) to (13.53±0.14) μm.Temperature-Time modeling of apatite was completed based on date measurements of the fission track length and age.Analyses results reveal that the north part and middle part of West Tianshan has probably experienced rapid cooling events in late Cretaceous.The time for rapid cooling events in the northern part of West Tianshan mainly concentrates during 50～70 Ma,and the time for middle part of West Tianshan mainly concentrates during 70～90 Ma.In combination with other geological evidence,it can be suggested that West Tianshan started to experience differential uplift and exhumation process in late Cretaceous,and Yil basin changed from early-to mid Cretaceous uplift and exhumation to late Cretaceous deposition,with both flanks still experiencing rapid uplifting.The reason for that is attributed to multiple factors which controlled dynamic mechanism for uplift and exhumation events.The distant effect of the India-Asia collision likely provided such dynamical source,but differentiation of thermal-rheological structures and interaction of different structural boundaries should be the main control factor for different uplift and exhumation.关键词
裂变径迹/隆升-剥露/白垩纪/西天山Key words
fission/uplifting exhumation/Cretaceous/western Tianshan引用本文复制引用
张文高,杨斌,陈正乐,蔡琳博,韩凤彬,孙岳,吴玉,孟令通,何江涛,马骥..西天山白垩纪隆升-剥露的裂变径迹证据[J].地质学报,2017,91(3):510-522,13.基金项目
本文为国家自然科学基金新疆联合重点基金项目(编号U1403292)、国家科技支撑计划项目(编号2015BAB0613-4)、中国地质调查局地质调查工作项目(编号DD20160053)和公益性行业科研专项(编号201411024-3)联合资助成果. （编号U1403292）
