沉积与特提斯地质2023，Vol.43Issue(4)：747-758,12.DOI:10.19826/j.cnki.1009-3850.2021.06001
西藏林周盆地中侏罗统却桑温泉组碎屑锆石U-Pb年代学及地质意义
Detrital zircon U-Pb chronology and geological significance of the Middle Jurassic Quesang Hot Spring Formation in Linzhou Basin,Tibet
摘要
Abstract
The Linzhou Basin is located in the middle of the Gangdese Plate.Basin analysis of the Linzhou Basin will provide important sedimentological evidence for understanding the tectonic evolution process of the Gangdese Plate.This paper takes the Middle Jurassic Quesang Hot Spring Formation in the Linzhou Basin as the research object,and conducted petrology and detrital zircon U-Pb chronology.The results show that the youngest detrital zircon age of the lithic quartz sandstone of the Quesang Hot Spring Formation is 169 Ma,with age peaks such as 170-200 Ma,540-620 Ma,and 1055-1220 Ma.The youngest detrital zircon age is the response to a magmatic event triggered by the subduction of the Tethys oceanic crust.Regional comparative studies of detrital zircons show that the source of the Quesang Hot Spring Formation is mainly from the Tanga-Songduo orogenic belt in central Gangdese,which is a sedimentary record of the northward subduction and southward accretion of the Tethys Ocean.关键词
林周盆地/中侏罗统/却桑温泉组/碎屑锆石/物源分析Key words
Linzhou Basin/Middle Jurassic/Quesang Hot Spring Formation/detrital zircons/provenance分类
天文与地球科学引用本文复制引用
周豫,杨文光,朱利东,密文天,解龙,钟摇,麦源君,张洪亮,李楠..西藏林周盆地中侏罗统却桑温泉组碎屑锆石U-Pb年代学及地质意义[J].沉积与特提斯地质,2023,43(4):747-758,12.基金项目
国家自然科学基金项目(41972118) （41972118）
冈底斯-喜马拉雅铜矿资源基地调查项目(DD20160015) （DD20160015）
兰州大学西部矿产资源重点实验室开放基金(MRWCGS-2019-01) （MRWCGS-2019-01）
