缅甸掸邦排空市甘山岩体锆石U-Pb测年及地质意义
ZIRCON U-PB DATING AND GEOLOGICAL SIGNIFICANCE OF GANSHAN PLUTON,PAI KONG CITY,SHAN STATE,MYANMAR
张星培 1王国辉 1黄静1
作者信息
- 1. 云南黄金矿业集团股份有限公司,云南昆明,650200
- 折叠
摘要
甘山岩体呈岩株状出露于缅甸中部岛弧火山构造岩浆岩带内,大地构造属冈瓦纳大陆滇缅陆块群保山-掸泰结合带之保山-掸邦地块.锆石LA-ICP-MS U-Pb定年结果 43.67±0.3Ma,形成于古近系始新统,属喜马拉雅期侵入体.显示出高硅、过铝质、富K、Na,贫Ca、Fe、Mg的极成熟"S"型花岗岩特征.为喜山期碰撞造山后板内伸展作用的产物.
Abstract
The Ganshan pluton occurs as a rock stock in the island arc volcanic tectonic magmatic belt in central Myanmar,which belongs to the Baoshan-Shan State block of the Baoshan-Shantai junction zone of the Yunnan-Myanmar block group in the Gondwana continent.The zircon LA-ICP-MS U-Pb dating result is 43.67±0.3Ma,indicating that it was formed in the Paleogene Eocene and is a Himalayan intrusion.The pluton has the characteristics of extremely mature'S'-type granite with high silicon,peraluminous,enriched in K and Na,and depleted in Ca,Fe and Mg,indicating that it is the product of intraplate extension after collisional orogeny in Himalayan period.
关键词
二长花岗岩/岩石地球化学/锆石U-Pb年代学/甘山岩体/缅甸掸邦Key words
Monzonitic Granite/Rock Geochemistry/Zircon U-Pb Geochronology/Ganshan Pluton/Shan State,Myanmar引用本文复制引用
出版年
2024
NETL
NSTL
万方数据