西藏班公湖-怒江缝合带中段塔仁本洋岛型玄武岩的发现及地质意义

基金项目:

中国地质调查局“1:25万昂达尔错幅、帕度错幅”地质调查。

详细信息

The Tarenben oceanic-island basalts in the middle part of the Bangong-Nujiang suture zone, Xizang and their geological implications

摘要: 塔仁本洋岛型玄武岩是中特提斯洋古洋壳的重要组成部分,是班公湖-怒江缝合带内构造混杂岩中局部有序部分的特殊洋壳残片。它以具有海底爆发相与远洋放射虫硅质岩相整合和大洋板内碱性玄武岩的构造环境为主要特征。它的发现丰富了班-怒带的研究内容,证明当时中特提斯洋曾经有发育完好的古洋壳存在。
- 塔仁本 /
- 班公湖-怒江缝合带中段 /
- 洋岛型玄武岩 /
- 中特提斯洋 /
- 西藏
Abstract: The Tarenben oceanic-island basalts in Xizang occur as part of the Meso-Tethys oceanic crust and special remains of the oceanic crust from the tectonic mélanges in the middle part of the Bangong-Nujiang suture zone. These basalts are characterized by the tectonic settings of the oceanic within plate alkaline basalts in both the submarine eruptive facies and pelagic radiolarian silicalite facies. The discovery of the oceanic-island basalts has disclosed that there once existed the well-developed palaeo-oceanic crust in the Meso-Tethys.
- Tarenben /
- the middle part of the Bangong-Nujiang suture zone /
- oceanic-island basalt /
- Meso-Tethys /
- Xizang