焦家式金矿勘查与研究  

Exploration and scientific research of the Jiaojia-type gold deposit

作　　者：周明岭 孙亮亮 吕军阳 王斌 刘向东 鲍中义 张琪彬 周晓萍 解天赐 王珊珊 刘彩杰 徐韶辉 闫春明 张朋 张亮亮 杨真亮 范家盟 赵成乐 郭美丽 李瑞翔 ZHOU Mingling;SUN Liangliang;LYU Junyang;WANG Bin;LIU Xiangdong;BAO Zhongyi;ZHANG Qibin;ZHOU Xiaoping;XIE Tianci;WANG Shanshan;LIU Caijie;XU Shaohui;YAN Chunming;ZHANG Peng;ZHANG Liangliang;YANG Zhenliang;FAN Jiameng;ZHAO Chengle;GUO Meili;LI Ruixiang(No.6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources,Weihai 264209,Shandong,China;Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining,Weihai 264209,Shandong,China)

机构地区：[1]山东省地质矿产勘查开发局第六地质大队,山东威海264209 [2]自然资源部深部金矿勘查开采技术创新中心,山东威海264209

出　　处：《地质力学学报》2024年第5期747-767,共21页Journal of Geomechanics

摘　　要：焦家式金矿是20世纪60年代山东地质工作者在胶东西北部发现的金矿类型,其产出受区域性构造破碎带控制,成矿期普遍发生黄铁绢英岩化蚀变,成矿特征是规模大、蚀变分带明显、矿化集中、矿体形态简单、品位相对均匀、矿物组合简单。从发现到确立金矿类型经历了12年的勘查研究历程,在此之后得以迅速推广,并在胶东及全国多地取得了丰硕的找矿成果。21世纪以来,胶东地区焦家式金矿深部勘查成果不断涌现。截至2020年,累计提交金资源储量3617.12 t,助推胶东地区成为世界第三大金矿集区,中国黄金储量跃居世界第二。同时,对焦家式金矿的研究工作也取得了长足进展:成矿时代被精确限定在126~120 Ma;金矿形成于区域强烈伸展背景下,成矿物质来源具有多源性,太古代拉斑玄武岩为含金初始矿源岩;将成矿过程精细划分为4个阶段,并提出“热隆-伸展”成矿理论和“阶梯式”成矿模式;成矿深度为5~10 km,成矿后剥蚀厚度为5.2±1.2 km,矿床保存较好;胶西北地区三山岛、焦家和招平三大成矿带5000 m以浅预测金资源总量为7258~10150 t,显示出焦家式金矿深部巨大的找矿潜力。从浅部到深部不同勘查阶段总结出一套关键勘查技术组合。这些研究成果丰富完善了焦家式金矿成矿理论体系,使得成矿预测更加准确可靠,有力指导了胶东地区金矿勘查。[Objective]Jiaojia-type gold deposit is a new type of gold mine discovered by Shandong geologists in northwestern Jiaodong in the 1960s,and its output is controlled by regional tectonic fracture zones.Pyrite sericitized alteration generally occurred during the ore-forming period,which is characterized by a large scale,distinct alteration zones,concentration of mineralization,simple morphology of the ore body,relatively uniform grade,and simple mineral combinations.The deposit has gone through 12 years of exploration and scientific research,from discovery to establishment.[Methods]This new type of gold deposit has been rapidly promoted since its establishment and has achieved fruitful prospecting results in China.Deep exploration achievements of the Jiaojia-type gold deposit have been coming up in the Jiaodong area since the 21st century.[Results]The accumulated gold resource reserves submitted have been 3617.12 tons by 2020,which has helped the Jiaodong area become the third largest gold cluster in the world,and gold reserves of China have risen to the second rink in the world.Research on the Jiaojia-style gold mine has also made considerable progress,with the age of mineralization accurately limited to 126~120 Ma and formation occurring under a strong regional extension background.The source of mineralization material has multiple origins,with the Archean tholeiite being the initial source rock of gold-bearing minerals.The ore-forming process is divided into four stages,and the“thermo-extension”metallogenic theory and the step metallogenic model are proposed.The metallogenic depth is about 5~10 km,and the post-metallogenic denudation thickness is 5.2±1.2 km,with the deposits well preserved.[Conclusion]The metallogenic prediction study concluded that the total gold resources in the three major metallogenic zones of Sanshandao,Jiaojia,and Zhaoping in the northwestern Jiaozhou area were 7258~10150 tons of metal at a depth of 5000 m,which demonstrates the immense potential of the deeper part of the Jiaojia-type

关 键 词：焦家式金矿 成矿特征 成矿模式 金矿勘查 胶东 

分 类 号：P61[天文地球—矿床学] P624[天文地球—地质学]