胶东大尹格庄金矿床构造蚀变分带特征与成矿关系  

The structural-alteration zoning and mineralization of Dayingezhuang gold deposit,Jiaodong peninsula

作　　者：袁月蕾 刘晟辰 柳旭光 陈言飞 许亚青 范潇 霍庆龙 YUAN Yuelei;LIU Shengchen;LIU Xuguang;CHEN Yanfei;XU Yaqing;FAN Xiao;HUO Qinglong(State Key Laboratory of Resources and Environmental Information Systerm/Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;Shandong Jinshan Geological Exploration Co.,Ltd.,Yantai 265400,Shandong,China;Chinese Academy of Geological Sciences,Beijing 100037,China;Guizhou Coal Mine Geological Engineering Consultation and Geological Environment Monitoring Center,Guiyang 550001,Guizhou,China;Yungang Grottoes Research Institute,Datong 037007,Shanxi,China;Hebei Zhonglian Energy and Environmental Protection Technology Co.Ltd.,Shijiazhuang 050011,Heibei,China)

机构地区：[1]中国科学院地理科学与资源研究所/资源与环境信息系统国家重点实验室,北京100101 [2]山东金山地质勘探股份有限公司,山东烟台265400 [3]中国地质科学院,北京100037 [4]贵州省煤矿地质工程咨询与地质环境监测中心,贵州贵阳550001 [5]云冈石窟研究院,山西大同037007 [6]河北省众联能源环保科技有限公司,河北石家庄050011

出　　处：《地质通报》2023年第4期576-588,共13页Geological Bulletin of China

基　　金：山东黄金矿业(玲珑)有限公司项目《玲珑金矿田东部断裂蚀变成矿体系三维研究与深部预测》(编号:LLYY-2015-05);山东省国土资源厅项目《莱州-招远地区构造岩相体系演化与成矿规律研究》(编号:鲁地调合[2012]33号)。

摘　　要：大尹格庄金矿床是胶西北地区的特大型金矿床,为典型的破碎带蚀变岩型金矿床。研究大尹格庄金矿构造蚀变分带规律,对胶西北地区矿床研究及深部外围找矿有重要意义。通过对大尹格庄金矿床构造蚀变分带特征,以及各带岩石的岩相学、岩石地球化学、构造应力测算的系统研究,揭示大尹格庄金矿构造蚀变成矿的构造地球化学和构造物理化学过程。研究表明,①矿床断裂下盘由远矿围岩到矿体的构造蚀变分带模式为:弱钾化花岗质蚀变岩带→强钾化花岗质蚀变岩带→绢英岩化钾化花岗质蚀变岩带→黄铁绢英岩带(金矿主要发育带);②金矿由远矿蚀变带→黄铁绢英岩带,古构造差应力值呈现由小到大的变化趋势;③由远矿蚀变带→黄铁绢英岩带,Si、Na、Ba、Sr迁出,K、Fe、Cu、Zn、Pb迁入,Au含量不断增加,在未蚀变到弱钾化阶段,元素总体含量变化幅度较小,而在强钾和绢英岩化阶段变化幅度较大。成矿过程中构造应力场与岩石组分迁移具有耦合关系,绢英岩化阶段古构造差应力值较大,岩石破碎产生张性空间,同时元素含量变化幅度大,热液活动强烈,易富集成矿。As a large gold deposit in the northwest of Jiaodong peninsula,Dayingezhuang gold deposit is an altered rock-control gold deposit in fracture zone.The zoning of structural alteration of this deposit is important to the deep peripheral prospecting of deposits in the northwest of Jiaodong.This study presents the zoning of structural-alteration,the petrogenesis,geochemistry,and calculation of tectonic stress,to reveal the structural geochemistry and structural physicochemical process of structural alteration of the Dayingezhuang gold deposit.From the distal ore surrounding rock to the ore body:①the zonation pattern of structural alteration is weakly potassic alteration granitic rock→strongly potassic alteration granitic rock→phyllic and potassic alteration granitic rock→beresite;②The paleotectonic differential stress have an increase trend;③Si,Na,Ba and Srwaslost,K,Fe,Cu,Zn and Pb was externally supplied,and Au increased steadily in the whole mineralized process.The content of elements has a slight varies from unaltered rock to weakly potassic alteration granitic rock,with large amplitudes of variations from strongly potassic alteration granitic rock to beresite.During the mineralization process,the tectonic stress field and the migration of chemical compositions from rocks often display coupling behavior,as fracture and extensive space are often well developed within the rocks during the sericitization due to the relatively large paleotectonic differential stress,and this process is combined with the large variation in its compositions associated with intensive hydrothermal activity;all these factors together facilitate mineralization.

关 键 词：胶西北 大尹格庄金矿 构造蚀变分带 构造地球化学 构造物理化学 

分 类 号：P618.51[天文地球—矿床学]