鲁东榴辉岩基本特征

THE BASIC CHARACTERISTICS OF LUDONG ECLOGTE

摘要:

鲁东榴辉岩是秦岭—大别山榴辉岩带的东延部分，由郯庐断裂将其切割向北平移。榴辉岩的产状有三种，分别产于片麻岩、层状变质岩系和超镁铁质—镁铁质宕中。其成因有壳成、幔成和岩浆结晶型三种。榴辉岩形成于７．５亿年左右，经历了强烈的变质变形作用，改造最强烈的时间在３．２９—２．１亿年。

Abstract:

Ludong eclogite is the east extension portion of QinLing Dabieshan eclogite belt which iscut by Tanlu fault and slipped to north in strike . The eclogite takes three kinds of occurrence ingneiss , stratiform metamorphosed rocks and ultramafic mafic rocks respectively. Their genesesinclude three types of crust generation , mantle generation and magma crystallization. The eclogitewas formed about 750Ma ago and experienced intense metamorphism and deformation amongwhich the most intense was between 3290 2...