山东蓬莱石家金矿原生晕地球化学特征及深部找矿预测  

Geochemical Characteristics of Primary Halos and Deep Prospecting Prediction of the Shijia Gold Deposit in Penglai,Shandong Province

作　　者：张英帅 顾雪祥[1,3] 章永梅[1,2,3] 王佳琳 冯李强[1] 葛战林 何宇 ZHANG Yingshuai;GU Xuexiang;ZHANG Yongmei;WANG Jialin;FENG Liqiang;GE Zhanlin;HE Yu(School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China;State Key Laboratory for Mineral Deposits Research,Nanjing University,Nanjing,Jiangsu 210046,China;Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;Xi'an Mineral Resources Investigation Center(No.5 Gold Geological Party of PAP),China Geological Survey,Xi'an,Shaanxi 710100,China;Natural Resources Bureau of Liangshan Yi Autonomous Prefecture,Sichuan Province,Liangshan,Sichuan 615000,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]南京大学内生金属矿床成矿机制研究国家重点实验室,江苏南京210046 [3]中国地质大学地质过程与矿产资源国家重点实验室,北京100083 [4]中国地质调查局西安矿产资源调查中心(原武警黄金第五支队),陕西西安710100 [5]四川省凉山彝族自治州自然资源局,四川凉山615000

出　　处：《现代地质》2021年第1期258-269,共12页Geoscience

基　　金：国家重点研发计划“深地资源勘查开采”重点专项(2018YFC0604003);国家自然科学基金项目(41572062);南京大学内生金属矿床成矿机制研究国家重点实验室开放基金项目(2019-LAMD-11)。

摘　　要：为预测和评价山东蓬莱石家金矿床的深部找矿远景,延长矿山服务年限,着重论述了该矿床的原生晕地球化学特征,对矿床的深部找矿潜力进行了探讨。原生晕元素组合特征分析表明,石家金矿床的矿体及近矿晕元素组合为Au、Ag、Cu、Pb、Zn、S、Te,前缘晕为Hg、As、Sb、Ba,尾晕为Mo、W、Sn。元素异常形态特征显示,326号矿脉南段以前缘晕和近矿晕为主,北段以前缘晕和尾晕为主,近矿晕元素异常较弱,矿体总体具有向南侧伏的特点。原生晕轴向分带序列在36线和84线均呈现反分带和前缘晕、尾晕共存的特点,结合地球化学参数在垂向上呈振荡波动变化的特征,说明矿体由多期次成矿作用叠加形成,同时预示矿体向深部还有一定延伸或有盲矿体存在。综合分析认为,326号矿脉南段为成矿的有利部位,深部仍有较大的找矿空间;矿体北段深部矿化减弱,但出现了前缘晕、尾晕元素的共存,预示深部可能还有盲矿体存在。In order to predict and evaluate the deep prospecting potential of the Shijia gold deposit in Penglai of Shandong Province and to prolong the service life of the mine,this paper aims to describe the geochemical cha-racteristics of primary halos in the deposit and to discuss the deep prospecting potential of the deposit.Analysis of the characteristics of element association indicates that the combined elements of the orebodies and near-ore halos include Au,Ag,Cu,Pb,Zn,S,and Te,those of the front halos are Hg,As,Sb,Ba,and those of the tail halos consist of Mo,W,and Sn.The characteristics of element anomalies for the ore vein 326 show that the front and near-ore halos are dominant in the south,and the front and tail halos are dominant in the north while the near-ore halos is weak.The orebody is overall characterized by plunging southward at depth.The reverse zoning and coexistence of front halos and tail halos appear in the axial zoning sequence of primary halos along the prospecting lines 36 and 84.Combined with the characteristics of vertical oscillation and fluctuation of geochemical parameters,it is suggested that the ore bodies formed during multiple mineralization stages and may extend to the depth with blind ore bodies.Comprehensive analyses show that the southern section of the ore vein 326 is favorable for mineralization with a good potential for prospecting space in its deep sites.Although the deep mineralization in the northern section is weakened,the coexistence of front and tail halo elements indicates that there still may exist blind orebodies in its deep space.

关 键 词：地球化学特征 原生晕 深部找矿预测 石家金矿床 山东蓬莱 

分 类 号：P618.51[天文地球—矿床学] P632.2[天文地球—地质学]