闽北太阳山金矿外围麻源群第三段下部土壤地球化学分区的作用  

The role of soil geochemical zoning in the lower part of the third Member of the Mayuan Group outside the Taiyangshan gold deposit, Northern Fujian

作　　者：郝文刚 HAO Wen-gang(The Fourth Geological Brigade of North China Geological Survey Bureau,Qinhuangdao 066000,China)

机构地区：[1]华北地质勘查局第四地质大队,河北秦皇岛066000

出　　处：《世界有色金属》2024年第5期73-75,共3页World Nonferrous Metals

摘　　要：福建省建阳市太阳山金矿是闽北具有代表性的金矿点,矿区出露的主要地层属新元古界麻源群第三段下部,麻源群第三段第二岩性带是金的矿源层和赋矿层位。通过太阳山金矿及周边矿点资料数据和采矿区外围1:1万土壤地球化学测量土壤样品Au含量数据分析,发现麻源群第三段下部各地质单元Au含量在地层层序上存在“低-高-低”异常分布的规律性。以有限出露的基岩岩石组合类型为基础并结合Au在土壤中的分布异常、石墨矿物分布特征、地貌特征和少量地质工程验证等进行土壤地球化学分区,辅助划分了麻源群第三段第二岩性带与上覆和下伏地质单元的界线。The taiyangshan gold deposit in jianyang city of fujian province is a representative gold deposit in northern fujian.The main exposed strata of the mine belong to the lower part of the third member of the neoproterozoic mayyuan group,and the second lithologic belt of the third member of the mayuan group is the source bed and ore-bearing bed of gold.by analyzing the data of the taiyangshan gold mine and its surrounding mines and the 1:10000 soil geochemical survey data of soil samples outside the mining area,it is found that the average Au content of the geological units in the lower part of the third member of the mayuan group has the regularity of"low-high-low"abnormal distribution in the stratigraphic sequence.Based on the limited outlying bedrock rock assemblage type,combined with the distribution anomaly of Au in soil,the distribution characteristics of graphite minerals,the geomorphic characteristics and a small amount of geological engineering verification,the soil geochemical zoning was carried out to help divide the boundary between the second lithologic belt of the third member of the mayuan group and the overlying and underlying geological units.

关 键 词：麻源群第三段下部 金矿 土壤地球化学测量 土壤地球化学分区 闽北太阳山 

分 类 号：P59[天文地球—地球化学]