西藏斯弄多银多金属矿床北部角砾岩特征及成因  

Characteristics of Hydrothermal breccias in Sinongduo Silver Polymetallic Deposit, Tibet

作　　者：郝金月 冉凤琴 吴鑫[1] HAO Jin-yue;RAN Feng-qing;WU Xin(Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学,四川成都610059

出　　处：《世界有色金属》2021年第2期122-123,共2页World Nonferrous Metals

摘　　要：西藏斯弄多银多金属矿床产于陆相林子宗群火山岩中,是冈底斯成矿带首例发现的浅成低温热液型矿床。矿床北部发育多种类型角砾岩,根据角砾和胶结物特征,角砾岩分为火山沉积角砾岩、热液角砾岩和构造角砾岩三类。其中热液角砾岩为矿区主要矿化体,以网脉状矿化为主。热液角砾岩角砾可拼合性强,隐爆作用明显,大气降水和岩浆流体不同程度的混合作用可能是热液角砾岩形成的主要原因。The Sinongduo silver polymetallic deposit is the first case of superficial low-temperature hydrothermal deposit discovered in the Gangdisemetallogenic belt.Various types of breccias are developed in the northern part of the deposit.According to the characteristics of breccias and cements,breccias are divided into three types:volcanic sedimentary breccias,hydrothermal breccias and structural breccias.Among them,hydrothermal breccia is the main mineralized body in the mining area,and the main mineralization is network vein.The hydrothermal breccias can be assembled strongly,and the cryptoexplosion effect is obvious.The mixed effect of atmospheric precipitation and magmatic fluid to different degrees may be the main reason for the formation of hydrothermal breccia.

关 键 词：银多金属矿床 角砾岩 斯弄多 西藏 

分 类 号：P611[天文地球—矿床学]