摘要
西藏喜马拉雅特提斯北亚带内沿定日—康马一线展布近东西向变质核杂岩带，在这个带上康马变质核杂岩是一典型代表。该变质核杂岩核部由花岗岩及花岗岩边部片麻岩组成，岩体之上分别为早古生代构造片岩带、石炭—二叠纪褶叠层带及三叠—白垩纪板岩带组成。研究表明，构造片岩带构成了该变质核杂岩的拆离断层系，拆离断层剪切指向为上层系相对下层系自南而北运动，推测其形成于三叠纪—白垩纪。其后由于雅鲁藏布江缝合带的俯冲、碰撞，使得早期拆离系叠加岩浆热动力形成穹隆体。
There is a belt of metamorphic core complexes along Dingri Kangmar within the North subbelt of Tethys Himalayas. The Kangmar metamorphic core complexs the typical one in this belt. The core of it is chiefly granite. Over the complex are successively the lower Paleozoic tectonic schists zone, Carboniferous Permian “folding layer” zone, and Triassic Cretaceous slates zone. A detachment fault system consists of tectonic schists belt, which probably formed during the Permian Cretaceous. Later, the subduction of the Indian plate along the Yarlung Zangbo suture and the superposition of thermal domes created the domed form.
出处
《成都理工学院学报》
CSCD
1997年第2期62-67,共6页
Journal of Chengdu University of Technology
基金
西藏自治区地矿局
西藏自治区科委"八五"重点攻关项目
