地质通报2018，Vol.37Issue(4)：532-537,6.
北祁连玉石沟蛇绿岩形成时代的上限——来自正长岩锆石U-Pb定年的证据
LA-ICP-MS zircon U-Pb dating of syenite from Yushigou in Northern Qilian Mountain
摘要
Abstract
The Yushigou ophiolite in Northern Qilian Mountain,which has developed relatively complete and typical ophiolite rock association,has received widespread attention.The authors conducted the chronological study of zircons from the syenite by means of LA-ICP-MS U-Pb.The weighted mean age of the zircons is 522.7±5.3Ma,which belongs to the Early Cambrian and confirms the earliest record of alkaline intrusive magmatic activity in Northern Qilian Mountain.At the same time,this age gives a constraint that the upper limit of the age of Yushigou ophiolite should be no later than 522.7Ma.关键词
玉石沟蛇绿岩/正长岩/LA-ICP-MS锆石U-Pb定年/北祁连Key words
Yushigou ophiolite/syenite/LA-ICP-MS zircon U-Pb dating/Northern Qilian Mountain分类
天文与地球科学引用本文复制引用
王国强,李向民,余吉远,唐卓,朱涛,潘峰,张越,卜涛..北祁连玉石沟蛇绿岩形成时代的上限——来自正长岩锆石U-Pb定年的证据[J].地质通报,2018,37(4):532-537,6.基金项目
中国地质调查局项目《祁连成矿带肃南—大柴旦地区地质矿产调查》(编号:DD20160012)和国家自然科学基金项目《甘肃北山泥盆纪高镁安山岩岩石成因及其地球动力学意义》(批准号:41703038) （编号:DD20160012）
