河南店坊火山岩中锰铝榴石的研究  

RESEARCH ON SPESSARTITE OF THE VOLCANIC ROCKS IN DIANFANG DISTRICT, HENAN

作　　者：李增慧[1] 

机构地区：[1]天津地质矿产研究所

出　　处：《地球学报》1993年第Z1期55-68,共14页Acta Geoscientica Sinica

摘　　要：在店坊金矿区中元古界熊耳群的火山岩中发现石榴石,其产状有二:呈星点状散布于岩石中,或产于安山岩的裂隙或节理面上,呈单晶体。经矿物标型特征研究,应属锰铝榴石。热液蚀变与金矿化有关。推测其形成时的温压条件,t=550—400℃,P=100-300MPa,深度0—3km。Garnet has been found in the volcanic rocks of the Middle Proterozoic Xionger Group in the Dianfang gold mine district. It occurs single crystals sporadically disseminated in the parent rocks or in the cracks or on the joint planes of andesite. The study of its modal characteristics indicates that it belongs to the spessartite series and is related to hydrothermal alteration and gold mineralization. It is inferred that it was formed under a temperature of 550-400℃ and a pressure of 100-300 MPa and at a depth of 0-3km.

关 键 词：锰铝榴石 节理面 矿物标型 星点 金矿区 金矿化 火山岩系 热液蚀变 中元古界 安山岩 

分 类 号：P5[天文地球—地质学]