ROLE OF METASOMATIC PROCESSES IN RUBY-BEARING MARBLES FORMATION OF THE SOUTHERN URAL MOUNTAINS

作     者：A.KISSIN A.TOMILINA V.KOMASHCHENKO A.KISSIN;A.TOMILINA;V.KOMASHCHENKO

作者机构：Zavaritsky Institute of Geology and Geochemistry Ekaterinburg 620016 Russia North Caucasusmining Metallurgical Institute (State Technical University) Ekaterinburg 620016 Russia 

出 版 物：《地学前缘》 (Earth Science Frontiers)

年 卷 期：2017年第24卷第3期

页      面：257-262页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081803[工学-地质工程] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 

主　　题：Ural gems ruby marbles metasomatism 

摘      要：Ruby-bearing marbles of the Southern Ural Mountains are developed in the metamorphic perimeter of granites-gneisses domes where high grade metamorphic granitization and diaphthoresis have *** research into the development and occurrence of ruby-bearing marbles indicate that they formed as a result of repeated *** substrate consisted of an organogenous marine limestone containing Visean faunal *** Mg metasomatism of limestone during early progressive stages of metamorphism resulted in a substrate of dolomite composition containing faunal remains with a calcite *** temperature and pressure resulted in metamorphism of early Mg metasomatites,turning them into fine-grained marble containing Visean faunal *** stresses near the intrusive domes resulted in dedolomitization of early Mg metasomatites,giving rise to light,coarse-grained calcite marbles having polygonal-grained *** carbonaceous marbles became metamorphosed around the perimeter of granite-gneiss *** rheological properties allowed for plastic flow in these marbles into areas of tectonic neutrality,forming bodies of rheomorphic marbles,sometimes even among marbled *** bodies of Mg metasomatites underwent boudinage and *** cleavage occurred in axial blocks of inter-dome structures and in their steep *** platy jointing(banding,pseudo-lamination)formed in the *** of the plates is from several millimeters to *** underwent recrystallization with extension of grain size in the central parts of plates,sometimes amounting to 15-25cm in ***-bearing marbles consist of *** rock is coarse-grained,with a panidiomorphic *** is often observed in the plane of ***-calcite marble occurs among and grades into background calcite marbles,which are controlled by cleavage of *** is supposed that the ruby-bearing Mg-calcite ma