摘要
众所周知,除了矿物成分和化学成分以外,变质岩的组构也是变质岩最重要的鉴定特征和分类命名的标志。著名的俄罗斯结晶学家E.C.费多罗夫论述关于组构对于研究岩石的意义时曾提出“……结构和矿物成分乃是鉴定岩石之重要关键,而二者之中,关键更在于前者……”。
In microscopic metamorphic fabric study,we must pay attention to the equilibrium reactions between metamorphic minerals. Fabrics showing in-equilibrium may record the metamorphic history of the rocks.The symplektitic texture of minerals,in most case, is produced by incomplete metamorphic reactions.But these reactions might eventually go to complete while some participating phases were consumed.In the latter cases the reactants reserved may coexist with new minerals formed by this reaction, and make an equilibrium assemblege.When a reaction occurs under univariate condition,all mineral phases in the system are in equilibrium in spite of the presence of symplektitic texture.. If a mineral phase appears only in a given host mineral, it must be. in partial equilibrium with the latter,and is not in equilibrium with the other minerals of the rock.
出处
《吉林大学学报（地球科学版）》
EI
CAS
1985年第4期103-109,共7页
Journal of Jilin University：Earth Science Edition
