投稿时间：2013-04-07
修订日期：2014-01-24
网络发布日期：2014-06-28
中文摘要:西藏双湖县商旭金矿床位于班公湖-怒江缝合带中段。矿体赋存于中-下侏罗统木嘎岗日群浅变质复理石中,受北西西向断裂构造控制,呈透镜体状、脉状,或者似层状产出；矿石矿物以自然金为主,矿石类型为石英脉型和蚀变岩型,围岩蚀变特征明显。该矿床主要受地层及构造因素控制,矿区的构造、围岩蚀变、矿物、地球化学异常等可作为找矿标志。野外地质调查和矿床对比研究显示,商旭金矿床在矿物共生组合、蚀变类型、构造类型等方面,与典型的造山型金矿床相似,其成因类型属于造山型金矿床。商旭金矿床的发现为班公湖-怒江成矿带金等贵金属矿产的地质找矿工作开辟了新的方向。
Abstract:The Shangxu gold deposit is located in the middle part of Bangong Co-Nujiang River suture zone. Orebodies occur in the middle-Lower Jurassic Mygagangri Group which is mainly composed of metamorphic flysch, and NWW-trending faults control the orebodies which are mainly in lenticular and veined or stratoid forms. Ore mineral is mainly native gold, and ore types are coexistent quartz-vein type ore and altered-rock type ore, with obvious wall rock alteration. The deposit is mainly controlled by the stratigraphic and structural factors, and structure, wall rock alteration, mineral and geochemical anomaly can be regarded as prospecting indicators. Based on a comparative study and field geological survey, the authors hold that the Shangxu gold deposit is similar to orogenic type gold deposits in such aspects as mineral paragenetic associations, alteration types, and structure types. The Shangxu gold deposit is an orogenic type gold deposit. The discovery of the Shangxu gold deposit provides new direction for geological prospecting work in the Bangong Co-Nujiang River metallogenic belt.
keywords:geology orogenic gold deposit Mugagangri Group Shangxu Bangong Co-Nujiang River suture zone Tibet
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中图分类号：P618.51
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基金项目:本文由国家重点基础研究发展计划（编号：2011CB403105）、青藏专项“西藏铜铅锌国家级接替基地综合研究（编号：1212011121239）”、“西藏尼玛县商旭-达查地区金矿调查评价（编号：1212011121251）”和“班公湖-怒江成矿带铜多金属成矿规律综合研究（编号：1212011086074）”联合资助
引用文本：
黄瀚霄,李光明,刘波,张智林,马东,曲扎,肖万峰,刘洪.2014.藏北商旭造山型金矿床的发现及意义[J].矿床地质,33(3):486~496HUANG HanXiao,LI GuangMing,LIU Bo,ZHANG ZhiLin,MA Dong,QU Za,XIAO WanFeng,LIU Hong.2014.Discovery of Shangxu orogenic type gold deposit in northern Tibet and its significance[J].Mineral Deposits33(3):486~496
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