西天山乌孙山一带大哈拉军山组火山岩LA-ICP-MS锆石U-Pb定年  

LA-ICP-MS ZIRCON U-PB DATING OF VOLCANIC ROCKS FROM DAHALAJUNSHAN FORMATION,WUSUN MOUNTAINS IN WEST TIANSHAN

作　　者：张芳荣[1] 程春华[1] 余泉[1] 楼法生[1] 

机构地区：[1]江西省地质调查研究院,江西南昌330030

出　　处：《新疆地质》2009年第3期231-235,共5页Xinjiang Geology

基　　金：新疆中央专项资金项目(ZYZXKD2006-07)资助

摘　　要：西天山乌孙山一带广泛分布大哈拉军山火山岩,对其下段下部肉红色流纹质玻屑弱熔结凝灰岩和上部褐色英安岩进行LA-ICP-MS锆石U-Pb定年分析,得到(353.3±3.5)Ma、(344±6)Ma年龄,证实了乌孙山一带大哈拉军山组火山岩形成于早石炭世.Dahalajunshan volcanic rock widespreaded in the area of Wusun Mountains,West Tianshan.Two LA-ICP-MS zircon U-Pb ages have obtained from the different location of volcanic rocks in the low stratum,respectively 353.3± 3.SMa, 344± 6Ma.This paper proved that Dahalajunshan volcanic rocks in Wusun Mountains formed in the Late Devonian to Early Carboniferous.

关 键 词：西天山乌孙山 LA—ICP—MS锆石U—Pb定年 火山岩 大哈拉军山组 

分 类 号：P597.3[天文地球—地球化学]