辽宁大东沟超大型低品位金矿的发现及地质意义  

Discovery and geological significance of ultra-large low-grade gold deposit in Dadonggou,Liaoning Province

作　　者：李勇[1] 王东波[1] 樊金虎[1] 李浩 刘显高[1] 梁维天[1,3] 王鹏[1] LI Yong;WANG Dongbo;FAN Jinhu;LI Hao;LIU Xiangao;LIANG Weitian;WANG Peng(Liaoning Fifth Geological Brigade Co.,Ltd.,Yingkou 115100,China;Frontiers Science Center for Deep-time Digital Earth,China University of Ceosciences(Beijing),Beijing 100083,China;School of Geosciences and Info-Physics,Central South University,Changsha 410012,China)

机构地区：[1]辽宁省第五地质大队有限责任公司,辽宁营口115100 [2]中国地质大学(北京)深时数字地球前沿科学中心,北京100083 [3]中南大学地球科学与信息物理学院,湖南长沙410012

出　　处：《中国矿业》2025年第1期233-238,共6页China Mining Magazine

基　　金：辽宁省地矿集团项目资助(编号:JT202401)。

摘　　要：大东沟金矿是辽宁省第五地质大队有限责任公司近年发现的超大型低品位金矿床。矿区大地构造位于胶-辽-吉古元古代造山/活动带辽东段西端,赋矿地层及岩性为辽河群盖县岩组二段含碳质绢云千枚岩,大规模含金构造蚀变岩带受水平(或缓倾斜)剪切构造控制,带内金矿化广泛分布,含金相对均匀,含金一般为0.3×10^(-6)~1.0×10^(-6),少数样品可达1.0×10^(-6)~3.0×10^(-6),按低品位指标圈连矿体,矿区金资源量可达1000 t以上;矿体金矿物赋存状态简单,选冶技术指标较好,矿床埋藏浅,经济潜力巨大。大东沟矿床地质特征独特,以含金品位低、规模大、具有明显的层控属性和后期热液叠加改造特征,可称之为“大东沟式”金矿,其矿床学意义深远,深入研究可为辽东金矿矿集区同类型金矿找矿实现更大的突破提供参考。The Dadonggou Gold Deposit is an ultra-large low-grade gold deposit.It discovered by Liaoning Fifth Geological Brigade Co.,Ltd.in recent years.The geological structure of the mining area is located at the western end of the Liaodong Section of the Jiao-liao-Ji Paleoproterozoic Orogenic Belt.The ore bearing strata and lithology are carbonaceous sericite phyllite in the second section of the Gaixian Formation of the Liaohe Group.The large scale gold bearing structural alteration rock belt is controlled by horizontal(or gently inclined)shear structures,and gold mineralization is widely distributed in the belt.The gold content is relatively uniform,generally ranging from 0.3×10^(-6) to 1.0×10^(-6),with a few samples can reach 1.0×10^(-6) to 3.0×10^(-6).Ring the ore body according to the lowgrade index,the gold resources in the mining area can reach over a thousand tons;the occurrence state of gold minerals in the ore body is simple,with good selection and metallurgical technology indicators,shallow burial depth of the deposit,and huge economic potential.The geological characteristics of the deposit are unique,with low Au grade,large scale,obvious layer control properties,and later hydrothermal superposition and transformation characteristics.It can be called the“Dadonggou style”gold deposit,which has profound implications in ore deposit studies.It can promote greater breakthroughs in the exploration of similar gold deposits in the Liaodong gold deposit area through in depth research.

关 键 词：辽宁省 大东沟金矿 千吨级金矿床 超大型金矿 低品位金矿 地质意义 

分 类 号：TD15[矿业工程—矿山地质测量] P624.6[天文地球—地质矿产勘探]