摘要
公呼都格岩体位于中朝陆台北缘,侵入于奥陶系,被晚古生代晚期花岗岩侵入.黑云母K-Ar年龄测定为306.4Ma,属晚古生代中期的花岗岩.岩体主要岩石类型为花岗闪长岩及英云闪长岩,以发育富铁黑云母、属过铝质岩石为特征.SrI为0.7162,为S型壳源花岗岩.其形成于中朝板块与西伯利亚板块对接后期的超碰撞造陆阶段,产出部位受深断裂控制.
The Gonghuduge granite rock body, which is tectonically located in the north margin of Sino-Korean platform,intruded Ordovician strata and was intruded by late Late Paleozoic granite. The K-Ar dating （306. 4 Ma） of biotite shows that the rock is formed in the middle stage of Late Paleozoic era. The rock body is composed of mainly granodiorite and quartz-mica diorite. It is characterized by peraluminous rock, with high-Fe biotite. The Gonghuduge rock body belongs to crust-derived granite of S-type, formed in the post-collision-epirogenic movement in the later stage of the convergence of Sino-Korean and Siberian plates. The occurrence of the Gonghuduge granite is controlled by deep fault.
出处
《地质与资源》
CAS
2005年第2期97-102,共6页
Geology and Resources
关键词
花岗岩
S型
晚古生代中期
超碰撞
内蒙古中部
granite
S-type
the middle stage of Late Paleozoic, post-collision
Central Inner Mongolia
