论文部分内容阅读
宝音图群主要分布在内蒙古中西部霍各乞、狼山和图古日格一带,主要由云母片岩、石英岩、大理岩夹(石榴石)斜长角闪岩组成,其中云母片岩中出现有石榴石、十字石、蓝晶石等特征中压型变质矿物.前人研究认为宝音图群的原岩形成于中元古代(<1426Ma),属于华北克拉通的一部分,代表被动大陆边缘的裂谷环境.本文选择其中石榴石斜长角闪岩进行变质作用和年代学研究.石榴石斜长角闪岩样品13LS08含角闪石63%(vol.)、斜长石11%、石榴
The Baoyin Tuqun is mainly distributed in the regions of Hokguidai, Langshan and Tucumuge in the central and western Inner Mongolia, and is mainly composed of mica schist, quartzite and marble clip (garnet) amphibolite, in which mica schists appear Metamorphic minerals such as garnet, philosopher’s stone, kyanite, etc. Previous studies suggest that the original rock of the Baoyin Tu Group was formed in the Mesoproterozoic (<1426Ma) and is part of the North China Craton, representing the passive continental margin .In this paper, we selected the garnet amphibolite to study the metamorphism and chronology. The garnet amphibolite sample 13LS08 contains 63% (vol.) Amphiboles, 11% plagioclase,