摘要
为加强招平断裂带深部找矿,总结提出"胶西北三大断裂赋矿深度对称、矿体规模对称"的找矿新思路,在招平断裂水旺庄矿区进行验证,取得突破。并首次制作跨四探矿权的5 000 m地质剖面图,研究、指导水旺庄深部找矿,将招平断裂勘查深度从-1 500 m延伸至-2 200 m以上,新增金资源量110 t,使招平断裂带提交金资源量达到1080 t,成为千吨级控矿断裂,其中2号主矿体,新增资源量近90 t,其资源量增加至120余吨,单矿体达到特大型金矿的规模。根据最新研究成果,发现招平断裂北段九曲蒋家208断裂和破头青断裂相互叠加影响形成千米级巨厚蚀变带,按蚀变程度由浅至深划分为5层,其中浅部一、二层由破头青断裂控制,中间第三层由破头青和九曲蒋家208断裂共同控制,深部四、五层由九曲蒋家208断裂控制,厚大矿体即赋存于第四层绢英岩化花岗质碎裂岩带内。新思路、新方法的应用极大提高了工程部署合理性,二期详查钻孔见矿率达到100%,取得重大找矿成果,呈现了招平断裂北段深部轨迹。确定九曲蒋家208断裂为招平断裂北段深部找矿的主要目标。
In order to strengthen deep ore prospecting in Zhaoping fault belt,new prospecting ideas have been summarized as follows:the ore bearing depth and ore body scale of three main faults in northwestern Jiaodong Peninsula are symmetrical,which has been verified in Shuiwangzhuang mining area of Zhaoping fault belt.By the guidance of the profile which cross4rights of prospecting at the depth of more than5000m,the depth of prospecting work extends from1500M to2200m,newly increased gold resources are170t,and total amount of submitted gold resources of Zhaoping fault belt are1080t.The newly increased gold resource of No.2ore body is nearly90t,the amount of gold resource has increased to more than120t,and single ore body can reach super large scale.According to the research,it is found that thousand meters scale thickness alteration zone has been formed by the superposition of No.208fault in Jiuqujiangjia and Potouqing fault in northern Zhaoping fault belt.According to alteration degree,it can be divided into five floors from shallow to deep part,The first and second floor is controlled by Potouqing fault,the third floor is controlled by Potouqing fault and Jiuqufault,and the fouth and fifth floor is controlled by Jiuqu fault.The thick ore body occurres in the phyllic granitic cataclasite of the fouthfloor alteration zone.The application of new ideas and new methods has greatly improved the rationality of arrangement which has brought about great achievements that the rate for ore discovery of drill holes reache100%.The deep trajectory of Zhaoping fault belt is presented which shows that No.208fault in Jiuqujiangjia is the major deep prospecting target in northen Zhaoping fault belt.
作者
刘国栋
李娟
LIU Guodong;LI Juan(No.6 Exploration Institute of Geology and Mineral Resources, Shandong Zhaoyuan 265400, China;Zhaoyuan Geological Surveying and Geological Disaster Emergency Technology Guidance Center, Shandong Zhaoyuan 265400, China;Luoshan Provincial Geological Park Management Office in Zhaoyuan City, Shandong Zhaoyuan 265400, China)
出处
《山东国土资源》
2019年第1期1-7,共7页
Shandong Land and Resources
基金
山东省重点研发计划项目
深部金矿资源评价理论
方法与预测(2017CXGC1604)
山东省地矿局地质科技攻关项目
招平断裂带北段控矿构造及找矿方向研究(编号:KY2016011)
山东省地质勘查项目
山东省招远市水旺庄-李家庄大型金矿床深部及外围金矿调查评价(鲁勘字(2018)22号)联合资助
关键词
对称成矿
九曲蒋家208断裂
水旺庄
招平断裂
胶东
Symmetrical mineralization
No.208 fault in Jiuqujiangjia
Shuiwangzhuang
Zhaoping fault zone
Jiaodong area
