地质通报2016，Vol.35Issue(5)：727-737,11.
滇西石鼓杂岩南部早白垩世以来剥露隆升的锆石和磷灰石裂变径迹证据
The exhumation and uplift of the southern Shigu complex since Early Cretaceous evidenced by zircon and apatite fission track
摘要
Abstract
The Shigu complex lies on the southeastern margin of the Tibetan Plateau, and is mainly distributed in Shigu and Zhongdi⁃an areas. The complex has experienced polyphase superposition of metamorphism and deformation. In order to reveal the low tem⁃perature thermal evolution and exhumation history at the shallow crustal level of the complex and correctly understand the exhuma⁃tion and tectonic evolution of the metamorphic dome in eastern Tibet, the authors collected zircon and apatite fission track samples for the fission track analysis along the Shigu Town-Labazhi section. The analytical results show that the Shigu complex firstly experi⁃enced a slow cooling and exhumation from Early Cretaceous (133~145Ma) to Oligocene (31Ma), and a relatively rapid cooling pro⁃cess started from Oligocene. Time-temperature history simulated by inverse modeling of apatite fission track also reflects a relatively rapid cooling process at the second stage. From regional structural analysis, it is suggested that the far-field effects of the collision be⁃tween the Lhasa and Qiangtang plates may have strongly affected the Early Cretaceous exhumation of the complex. Furthermore, the Indian-Eurasian collision and post-collisional effects had profound effects on the Cenozoic exhumation of the complex.关键词
藏东地区/石鼓杂岩/裂变径迹/早白垩世与渐新世剥露/板块作用Key words
eastern Tibet/Shigu complex/fission track/Early Cretaceous and Oligocene exhumation/plate interaction分类
天文与地球科学引用本文复制引用
陈小宇,刘俊来,吴文斌..滇西石鼓杂岩南部早白垩世以来剥露隆升的锆石和磷灰石裂变径迹证据[J].地质通报,2016,35(5):727-737,11.基金项目
国家自然科学基金项目（批准号41430211、41172190）和中国地质调查局项目 （）
