西北地质2024，Vol.57Issue(6)：1-24,24.DOI:10.12401/j.nwg.2024061
塔里木克拉通太古宙大陆起源:进展与问题
Origin of Archean Continental Crust in the Tarim Craton:Progresses and Issues
摘要
Abstract
The Tarim Craton is one of the three ancient continental blocks in China,but the formation and evo-lution of its ancient basement have been poorly studied due to extensive sedimentary cover.However,in recent years,Archean rocks have been found in the Kuruktag,Dunhuang,North Altyn Tagh,Tiekelike areas on the pe-riphery of the Tarim Basin,as well as in the drill core from its basement,indicating that there may be a widespread Archean basement.In this paper,the study history and recent progress of Archean rocks in the Tarim Craton are summarized,the formation time,mechanism and geodynamics of Archean continental crust are dis-cussed,and the future research direction is pointed out.The results show that the formation of the Archean conti-nental crust in the Tarim Craton appears to have regional differences.Neoarchean magmatism was widely devel-oped in the Kuruktag,Dunhuang and North Altyn areas,with peaks of～2.5 Ga and～2.7 Ga.The discovery of～3.7 Ga rocks in the North Altyn Tagh area provides reliable evidence for the existence of an Eoarchean conti-nental nucleus in the Tarim Craton.The Tiekelike area and basin basement in the southwest Tarim are character-ized by Mesoarchean(3.2～2.8 Ga)crustal growth and reworking,and no Neoarchean rocks have been found.Geochemistry,thermodynamic modelling and zircon oxybarometer-hygrometer indicate that the Archean conti-nental crust might have been produced by water-induced melting of different source rocks at different depths(pressures)and formed in subduction-related tectonic settings,indicating that early plate tectonics have been in operation since the Eoarchean.The elucidation of the components of the Archean continental crust,the identifi-cation of metamorphism and deformation,and the determination of the physical and chemical conditions of mag-ma formation are still the focus of future studies of the Archean geology in the Tarim Craton.关键词
太古宙/大陆地壳/板块构造/锆石/TTG片麻岩/塔里木克拉通Key words
Archean/continental crust/plate tectonics/zircon/TTG gneisses/Tarim craton分类
天文与地球科学引用本文复制引用
葛荣峰,朱文斌,周腾,司杨,马丁..塔里木克拉通太古宙大陆起源:进展与问题[J].西北地质,2024,57(6):1-24,24.基金项目
国家自然科学基金优秀青年基金项目(41922017)、面上项目(41872191、42372228),国家重点研发计划(2023YFF0804402),中央高校基本科研业务费专项资金-关键地球物质循环前沿科学中心"GeoX"交叉项目联合资助. （41922017）
