摘要
掉石沟铅锌矿是敦煌地块南缘代表性的叠加改造层控夕卡岩型矿床。矿床赋存于敦煌岩群第二岩组第二岩段的大理岩、石榴石透辉石夕卡岩及石墨斜长变粒岩、蚀变碎裂岩中,矿石类型主要有夕卡岩型、蚀变碎裂岩型、石英脉型、石墨斜长变粒岩型,有用组分主要为Pb、Zn。铁锰帽及石墨斜长变粒岩是矿床的直接找矿标志,铅族重砂异常及化探异常是间接的找矿标志。准确把握矿床的找矿标志是寻找该类矿床有效途径,目前已在掉石沟外围发现多处铅锌矿点,说明在掉石沟铅锌矿区及外围地区具有良好的找矿前景,进而提出了进一步找矿的新思路。
The Diaoshigou lead-zinc deposit is a typical skarn deposit controlled by superposition and reformed strata in the southern margin of the Dunhuang block.It occurs in the marble,garnet-diopside skarn,graphite plagiogranulite,and altered cataclastic rock of the second section,second group of the Dunhuang rock-group.The ore types include skarn,altered chipped rock,quartz vein,and graphite plagiogranulite types,with useful compositions of Pb and Zn.Iron and manganese caps and graphite plagiogranulite are the direct indicators,and lead clan placer anomalies and geochemical anomalies are indirect markers for ore search.Grasping the ore prospecting markers is an effective way for search of these deposits.Lots of lead-zinc ore-points have been found in the Diaoshigou area and its surroundings,showing a good prospect.And some new ideas for further survey in this region are proposed in this paper.
出处
《地质与勘探》
CAS
CSCD
北大核心
2010年第5期836-843,共8页
Geology and Exploration
关键词
甘肃
掉石沟铅锌矿
矿床特征
找矿思路
Gansu
Diaoshigou lead-zinc deposit
deposit characteristic
prospecting ideas
