摘要
法库地区十间房片麻状二长花岗岩过去被认为是大古代或元古代混合岩和混合花岗岩．１：５万地质调查表明，该花岗岩是与印支－海西期韧性剪切构造同期侵位的花岗岩，同位素年龄测试属中三叠世．该岩体属复式岩体，是上部地壳沉积物质局部熔融的花岗岩浆沿剪切带被动侵位的“Ｓ”型大型岩床．
Before, the Shijianfsng ultra-unit gneiss granite in Faku area was considerded to be Archean or Proterozoic migmatite and migmatitic granite. The 1: 50000 regional geological surveying work indicated that the granite was emplaced contemporaneously with Indo-chinese-Hercynian ductile shear structures,its isotopic age be determined to be Mid-Triassic period. The rock body, J compound body was a larse-scale 'S'-type sill, which the partly molten granitic magma from upper crustal was emplaced along shear zones.
出处
《辽宁地质》
1996年第4期274-283,共10页
关键词
二长花岗岩
混合岩
花岗岩
成岩
侵位机制
Adamellite
Migmatite
Migmatitic granite
'S'-type granite
Ductile shear zone
