摘要
位于衡山西缘的界牌混合岩带是一个由早期的眼球状混合岩和晚期的条痕混合岩组成的复式岩带,其原岩为高变质相的韧性变形变质岩。根据其产出的地质环境及其中丰富的同混合和晚混合变形组构,界牌混合岩属断裂混合岩,不应划归白石峰岩体或南岳岩体。它们之间的紧密共生构成了“韧性变形变质岩—断裂混合岩—重熔花岗岩”三位一体组合,代表了断裂从韧性变形变质→混合岩化→重熔的递进变形变质序列。
Jiepai migmatite belt, located in the western margin of Hengshan mountain, consists of early-epoch augen migmatite and late-epoch streaky migmatite. Their original orcks are ductile deformation metamorphic rocks of higher metamorphic facies. In the light of its geologic occurrence and its synmigmatitic and postmigmatitic deformation fabrics, Jiepai migmatite is recognized as fractural migmatites. It is not appropriate to incorporate it into marginal migmatite of Baishifeng granitic body or Nanyue granitic body. Their coexistence formed a trinity association fo ductile deformation-metamorphic rock—fractural migmatiteremelting granite, which reflects a progressive series of fractural deformation-metamorphism.
出处
《湖南地质》
1990年第4期39-42,50,共5页
Hunan Geology
关键词
断裂
混合岩
变形
变质
眼球状
Fractural migmatite
Progressive deformation mefamorphism
Arisen migmatite
Streaky migmatite
