阿尔金山金雁山岩体锆石U-Pb测年、岩石地球化学特征及地质意义
Zircon U-Pb Dating,Rock Geochemical Characteristics and Its Geological Significance of the Jinyanshan Pluton in the Altun Mountains
班建永 1李佳 1冉秋成 1曹福根 1李锴强1
作者信息
- 1. 新疆维吾尔自治区地质矿产勘查开发局第一区域地质调查大队,新疆 乌鲁木齐 830011
- 折叠
摘要
阿尔金山脉中部金雁山岩体岩石学和地球化学研究结果显示,该岩体具高钾钙碱性过铝质"S"型花岗岩特征,获得锆石U-Pb年龄(442.6±4.6)Ma,认为形成于活动大陆边缘同碰撞至碰撞后的拉张环境,为晚奥陶—早志留世红柳沟-拉配泉古大洋闭合后,敦煌陆块与阿中地块碰撞过程中,在俯冲洋壳牵引下,敦煌大陆边缘被拖至地幔中发生熔融.
Abstract
The petrological and geochemical research results of the Jinyanshan rock mass in the central Altun Moun-tains show that the rock mass has the characteristics of a high potassium calcium alkaline peraluminous"S"type granite,and a zircon U-Pb age of(442.6±4.6)Ma is obtained.It is believed that it was formed in a extensional environment from the active continental margin and collision to the collision after the closure of the Late Ordovician Early Silurian Hongliugou Lapaiquan ancient ocean.During the collision process between the Dunhuang block and the Azhong block,under the traction of the subducting oceanic crust,the Dunhuang continental margin was dragged into the mantle and melted.
关键词
阿尔金/金燕山/侵入岩/碰撞造山/早古生代Key words
Altun/Jinyan Mountain/Intrusive rock/Collisional mountain building/Early Paleozoic Era引用本文复制引用
出版年
2024
NETL
NSTL
万方数据