| 西藏雅鲁藏布江缝合带西段龙拉多蛇绿岩成因及其动力学背景 |
| |
| 关键词:Yarlung–Zangbo suture zone ophiolite geochemistry geochronology southern Xizang |
| 基金项目:本文由云南省教育厅科学研究基金项目(编号: 2023J1278)、云南省科技厅基础研究专项面上项目(编号: 202301AT070012)、滇西应用技术大学人才引进科研启动项目(编号: 2022RCKY0004)联合资助。 |
|
| 摘要点击次数: 394 |
| 全文下载次数: 33 |
| 摘要: |
| Genesis and Geodynamic Setting of the Longladuo ophiolite from the Western Section of the Yarlung-Zangbo Suture Zone, Xizang |
| OIB-type ophiolites have formed in different sections along the Yarlung-Zangbo Suture Zone. However, research results regarding the genetic mechanisms and tectonic settings of OIB-type ophiolites are debatable. This study focused on the geochemistry and geochronology of newly discovered OIB-type ophiolites in the Longladuo area of the western section of the suture zone. The results showed that the Longladuo ophiolites formed during 140–142 Ma in an intraplate extensional tectonic environment. The parental magma was formed by the partial melting of approximately 10% spinel and garnet lherzolite. During the magmatic evolution process, it experienced fractional crystallization of minerals such as olivine and pyroxene. The OIB-type ophiolites in the Yarlung-Zangbo Suture Zone may have originated from the mantle plume magmatism during the ocean basin expansion stage in Late Jurassic–Early Cretaceous. |
| HOU Yunling,HE Juan,CHEN Yinghui,LI Jianghan.2026.Genesis and Geodynamic Setting of the Longladuo ophiolite from the Western Section of the Yarlung-Zangbo Suture Zone, Xizang[J].Acta Geoscientica Sinica,47(3):629-643. |
| 查看全文 查看/发表评论 下载PDF阅读器 |