Ages of Alpine tectonometamorphic events in the northwestern Himalaya (northern Pakistan) by 39Ar/40Ar method
Ages of Alpine tectonometamorphic events in the northwestern Himalaya (northern Pakistan) by 39Ar/40Ar method
复制标题
39Ar/40Ar法测定喜马拉雅山西北部（巴基斯坦北部）高山构造变质事件的年龄
DOI：
10.1029/tc003i001p00001
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
P. Matte
中科院分区：
文献类型：
--
作者：
H. Maluski;P. Matte
发生在巴基斯坦北部主缝合线以南喜马拉雅环流西段西部的主要构造变质高山事件是用39Ar/40Ar方法测年的。这些事件如下：（1）沿着缝合线的构造/蛇绿岩混杂岩中存在蓝片岩变质作用（80±5Ma）（该事件发生在早期俯冲或仰俯阶段）（2）在印度板块碰撞后向北向亚洲下方俯冲期间，高山巴罗夫变质作用（50-30Ma）在印度板块的沉积盖层和正片麻岩中发育，以及（3）变质后淡色花岗岩（23Ma）的侵位是由于高山变质作用最高峰期间印度地壳融化而产生的。
The main tectonometamorphic alpine events which occurred in the western part of the western Himalayan virgation at south of the main suture, in northern Pakistan, are dated by the 39Ar/40Ar method. These events are as follows: (1) the blueschist metamorphism (80 ± 5 Ma) present in tectonic/ophiolititic melanges along the suture (this event occurred during an early subduction or obduction stage) (2) the alpine barrovian metamorphism (50–30 Ma) developed in the sedimentary cover and orthogneisses of the Indian Plate during the postcollisional northward underthrusting of this plate below Asia, and (3) the emplacement of postmetamorphic leucogranites (23 Ma) resulting from the melting of the Indian crust during the climax of the alpine metamorphism.