城固县北部——洋县一带地层矿石特征  

Characteristics of crystalline basement rocks in the area of northern chenggu county to yangxian county

作　　者：孙德 吴宝鹏 高田 肖燮 SUN De;WU Bao-peng;GAO Tian;XIAO Xie(Zhongshan Nuclear Industry Group 214 Team Co., Ltd.,Hanzhong 723200,China)

机构地区：[1]中陕核工业集团二一四大队有限公司,陕西汉中723200

出　　处：《世界有色金属》2018年第24期171-172,共2页World Nonferrous Metals

摘　　要：长角坝岩群主要为片麻岩、变粒岩、大理岩、石英岩的区域变质岩组合,变质矿物共生组合石榴子石+石墨+矽线石+黑云母+石英±斜长石^([1])。是结晶基底地层,变质作用达高角闪岩相至麻粒岩相,属中压高温的变质条件,矿物经结晶到重结晶作用;变形程度高,受构造应力作用矿物分异作用明显,主要矿产以同生沉积的石墨、石英岩、矽线石等非金属矿产。Changjioba rock group is mainly composed of regional metamorphic rock assemblages of gneiss, allogranulite, marble and quartzite, and metamorphic mineral symbiotic assemblages of garnet + graphite + siliconite + biotite + quartz + plagioclase [1]. Is the crystalline basement stratum, metamorphism reached high amphibolite facies to granulite facies, belongs to the metamorphic condition of medium pressure and high temperature, mineral crystallization to recrystallization;High degree of deformation, obvious differentiation of minerals under tectonic stress, the main minerals are syngenetic deposits of graphite, quartzite, siliconite and other non-metallic minerals.

关 键 词：城固县双溪~小河 结晶基底 孔兹岩系 矿石特征 

分 类 号：P619.14[天文地球—矿床学]