西藏达龙钨钼多金属矿床矿化分带特征  

The mineralization zoning feature of Dalong W-Mo polymetallic deposit in Tibet

作　　者：孙广沅[1,2] 莫江平[1,2] 郝以顺 朱烨[1] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《矿产与地质》2017年第1期46-52,共7页Mineral Resources and Geology

基　　金："十二五"国家科技支撑计划项目(批准号:2015BAB05B05)资助

摘　　要：达龙矿床位于冈底斯成矿带东段,为一大型钨钼多金属矿床,工程控制其倾向延伸超过1000m。文章系统总结了达龙矿床地质特征,矿床类型为受构造控制的脉状矽卡岩型钨钼多金属矿床,研究发现其垂向上蚀变与矿化分带明显,蚀变分带为(硅化)辉石石榴子石磁黄铁矿矽卡岩化带→(绢云母)磁黄铁矿石榴子石辉石矽卡岩化带→石榴子石黄铁绢英岩化带→黄铁绢英岩绿帘石化带→(石榴子石)绿泥石绿帘石化带,矿化分带为:块状钼钨矿化带→脉状钨(钼)矿化带→细网脉状(铜铅锌)钨矿化带→网脉浸染状铅锌矿化带→脉状铜铅锌矿化带,该矿床蚀变与矿化分带的划分可指导冈底斯成矿带东段同类型矿床的深部找矿。Dalong deposit, located in the eastern part of Gangdise metallogenic zone, is a large W-Mo polymetallic deposit. The tendency of engineering controlling extends for more than 1000 meters. The paper has summarized the geological characteristics of Dalong deposit, which is a vein skarn type W-Mo polymetallic deposit controlled by structure. The study indicates that its vertical alteration and mineralization is very obvious, The alteration belt can be divided into （silicified） pyroxene garnet pyrrhotite skarn zone→（sericite） pyrrhotite garnet pyroxene skarn zone→garnet pyrite sericitolite zone→pyrite sericitolite epidote zone→（garnet） chlorite epidote zone. The mineralization belt can be divided into Mo-W massive zone→W（Mo）vein zone →（Cu-Pb-Zn） W fine netvein zone→Pb-Zn netvein disseminated zone→Cu-Pb-Zn vein zone. The alteration and mineralization zoning division can guide the deposit prospecting in the deep place for the similar type deposits in the eastern part of Gangdise metallogenic zone.

关 键 词：钨钼矿床 地质特征 蚀变矿化 垂向分带 西藏达龙 

分 类 号：P618.6[天文地球—矿床学]