地质通报2024，Vol.43Issue(6)：1032-1046,15.DOI:10.12097/gbc.2022.02.003
额尔齐斯杂岩碎屑锆石U-Pb年龄及其对阿尔泰和东准噶尔地体拼合时限的制约
Detrital zircon U-Pb ages from the Irtysh complex and its constraints on the amalgamation time of Altai and East Junggar terranes
摘要
Abstract
The Irtysh complex is located between Altai and East Junggar terranes in Northern Xinjiang and underwent strong metamorphism and deformation,which recorded the tectonic amalgamation of the two terrains.In order to constrain the amalgamation time of the Altai and East Junggar terrains,we used detrital zircon U-Pb ages to analyze and discuss the provenance.The youngest detrital zircon age obtained from the metaclastic rock sample is 354 Ma.Based on a comprehensive analysis of new and published detrital zircon U-Pb age data from the Irtysh complex and a comparison with regional tectonic and magmatic U-Pb age data,this paper proposes that the Irtysh complex may contain older detritus from the passive continental margin of the Altai terrane,in addition to the Late Carboniferous syn-collisional deposits from both of the Altai and East Junggar terranes and only the East Junggar terrane,suggesting that the Altai and East Junggar terranes had been amalgamated when the Irtysh complex was formed.关键词
额尔齐斯杂岩/变碎屑岩/物源分析/碎屑锆石Key words
Irtysh complex/metaclastic rocks/provenance analysis/detrital zircon分类
天文与地球科学引用本文复制引用
李昂,徐严,韩宝福,廖闻..额尔齐斯杂岩碎屑锆石U-Pb年龄及其对阿尔泰和东准噶尔地体拼合时限的制约[J].地质通报,2024,43(6):1032-1046,15.基金项目
国家自然科学基金项目《古亚洲洋南部俯冲起始的三重约束》(批准号:41972234) （批准号:41972234）
