地质学报2017，Vol.91Issue(6)：1245-1258,14.
班公湖—怒江成矿带商旭造山型金矿床Ⅲ号矿段深部找矿潜力研究
Prospecting Potential Analysis of Deep No.Ⅲ Ore Section in the Shangxu Orogenic Gold Deposit, Bangong Co-Nujiang Metallogenic Belt, Tibet
摘要
Abstract
Shangxu orogenic-type gold deposit is located in the center of the Bangonghu-Nujiang suture zone,Shuanghu county of Tibet.The orebodies,controlled by the NWW-trending brittle-ductilefractures,occur as layer or veins in the mictite of the Middle-Lower Jurassic Mugagangri Group.The wall rocks are dominated by carbonaceous slate and metasandstone.The ores are mainly quartz vein type and tectonic alteration type.The ore structures are mainly veinlet and brecciated.The ore mineral is mainly native gold.Ore deposit and isotopic geochemical analysis show that ore-forming materials were mainly derived from the Mugagangri gold-bearing formation.The NWW-trending brittle-ductile structures provide transport corridor and space for ore deposition.Early Cretaceous tectonic magma in the southern margin of Qiangtang provided driving force for the transport of Au-bearing hydrothermal fluids.The strongly deformed areas in the NWW-trending fault,where is accompanied by pyritization and silication,are preferable for ore prospecting.Pedogeochemistry survey shows that the T-4 and T-5 abnormal areas in the south of the No.Ⅲ ore section are of further prospecting potential.Additionally,the electrical sounding data indicate that the ore-controlling structures extend to the deep of the No.lⅢ ore section and probably connects with deep faulting.In summary,we suggest that it is of great ore prospecting potential under the 4200 m elevation of the No.Ⅲ-2 ore section.Further investigation work is needed to upgrade gold resources amount and enlarge the size of the deposit.At last,an exploration method "Three-step Method" is preliminarily summarized for the Shangxu orogenic gold deposit.关键词
西藏/班公湖/怒江/商旭金矿/成矿条件分析/找矿前景Key words
Tibet/Bangong Co/Nujiang/Shangxu Gold Deposits/Ore-Search Prospect/Metallogenic Condition引用本文复制引用
刘洪,李光明,黄瀚霄,张智林,肖万峰,焦彦杰,梁生贤,郭境,兰双双..班公湖—怒江成矿带商旭造山型金矿床Ⅲ号矿段深部找矿潜力研究[J].地质学报,2017,91(6):1245-1258,14.基金项目
本文为国家重点研发计划(编号:2016YFC0600300)、中国地质调查项目(编号:DD20160015,DD20160026)、中国地质调查局成都地质调查中心青年基金(编号:所控基[2014]-03)资助的成果. （编号:2016YFC0600300）
