岩屑地球化学测量在黑龙江省三道湾子浅覆盖区的找矿应用效果  

Application Effect of Rock Debris Geochemical Survey in Prospecting in Sandaowanzi Shallow Overburden Area,Heilongjiang Province

作　　者：张玉鹏 史冬岩 吕明奇 李成禄 张坤 唐伟 ZHANG Yupeng;SHI Dongyan;LV Mingqi;LI Chenglu;ZHANG Kun;TANG Wei(Heilongjiang Institute of Natural Resources,Harbin 150036,Heilongjiang,China;Heilongjiang Mining Group Co.,Ltd.,Harbin 150090,Heilongjiang,China;College of Earth Sciences,Jilin University,Changchun 130061,Jilin,China;Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,Guizhou,China)

机构地区：[1]黑龙江省自然资源调查院,黑龙江哈尔滨150036 [2]黑龙江省矿业集团有限责任公司,黑龙江哈尔滨150090 [3]吉林大学地球科学学院,吉林长春130061 [4]中国科学院地球化学研究所,贵州贵阳550081

出　　处：《黄金科学技术》2022年第5期651-663,共13页Gold Science and Technology

基　　金：黑龙江省重点研发计划“黑龙江省大型二道坎银矿资源综合利用及成矿作用研究”(编号:GA21A204);黑龙江三道湾子金矿有限公司科研项目“黑龙江省黑河市三道湾子岩金矿普查”(编号:2019—2020年度);黑龙江省总工会职工创新补助资金项目(编号:2021-30)联合资助。

摘　　要：黑龙江省三道湾子地区是我国典型的浅覆盖区,也是重要的金多金属成矿集中区,区内已发现三道湾子、北大沟、纳金口子、340高地和三道湾子南山等10多处金矿床(点),找矿潜力巨大。区内开展了多次土壤地球化学测量工作,但尚未取得找矿突破。通过在研究区开展多种采样网度、粒级和层位的对比试验,确认了最佳的化探采样方法,即采用50 m×50 m网格化的岩屑地球化学测量技术方法。在对区内地球化学特征和元素共生组合特征等进行相关分析的基础上,结合区域成矿地质条件,圈定出综合异常30处,主成矿元素Au、Ag在有利构造部位强烈富集。通过异常查证,新发现金、银矿体12条,金矿体23条,并圈定出3个找矿远景区,找矿效果良好。研究表明:在三道湾子地区开展岩屑地球化学测量,能够快速、准确地圈定矿化蚀变范围,提高找矿效果,是行之有效的找矿方法,可为同类型森林沼泽地球化学景观区内找矿工作提供重要参考。The Sandaowanzi area is a typical shallow overburden area which hosts numerous gold polymetallic ore deposits in Heilongjiang Province,China.More than 10 gold deposits and ore occurrences have been found in the area,such as Sandaowanzi gold deposit,Beidagou gold deposit,Najinkouzi gold deposit,340 highland gold deposit,Sandaowanzi Nanshan gold deposit,etc.,with great prospecting potential.Many soil geochemical surveys have been carried out in the area,but no prospecting breakthrough has been made.Through the comparative tests of various sampling grids,grain sizes and horizons in the study area,the best geochemical sampling method was confirmed,and the 50 m×50 m gridded rock debris geochemical survey method was adopted.Based on the correlation analysis of geochemical characteristics and element symbiotic assemblage characteristics,and combined with regional ore-forming geological conditions,30 comprehensive anomalies were delineated.The main ore-forming elements Au and Ag are strongly enriched in favorable structural areas.Through anomaly verification,12 gold-silver orebodies and 23 gold orebodies have been found,and 3 prospective areas have been delineated,and good prospecting results have been obtained.The study shows that rock debris geochemical survey in Sandaowanzi area can quickly and accurately delineate the range of mineralization alteration and improve the prospecting effect,which is an effective prospecting method.It can provide an important reference for ore prospecting in the same type of forest swamp geochemical landscape area.

关 键 词：浅覆盖区 岩屑地球化学 异常查证 找矿远景区 三道湾子地区 黑龙江省 

分 类 号：P618.51[天文地球—矿床学]