吉林至珲春地区晚二叠世—早三叠世花岗岩成因机制  

The genetic mechanism of the late Permian-early Triassic granite from Jilin to Hunchun

作　　者：齐成栋[1] 纪春华[1] 韩江[1] 郭安臣[1] 邸新[1] 孙元喜[1] 

机构地区：[1]吉林省区域地质矿产调查所,吉林长春130022

出　　处：《吉林地质》2005年第2期10-15,共6页Jilin Geology

摘　　要：吉林—蛟河—敦化—珲春地区的晚二叠世—早三叠世花岗闪长质岩石中暗色微粒闪长质包体广泛发育,其形成与基性岩浆同酸性岩浆混合作用有关。该岩浆岩带形成于晚古生代末期陆—陆碰撞造山的动力背景下,碰撞过程中俯冲岩石圈的拆沉导致幔源岩浆的底侵作用是其形成重要机制。The dark micrograined dioritic inclusion of the late Permian--early Triassic granitic dioritic rooks in Jilin--Jiaohe- Dunhua- Hunchun is widely development. Its forming has a relation with the intermingling of basic magma and acid magma. The magmatic band was formed in the end of the late Paleozoic land--land collision-orogenic period, in collision process, the delamination of subducting lithosphere that leads to the underplating of the mantle--derived magma is an important mechanism for its forming.

关 键 词：岩浆混合作用 陆——陆碰撞 岩石圈拆沉 底侵作用 

分 类 号：P588.121[天文地球—岩石学]