黔西南大际山铀多金属成矿远景区土壤地球化学特征  

Characteristics of Soil Geochemistry in the Uranium-polymetallic Metallogenic Prospect Area at Dajishan,Southwestern Guizhou

作　　者：徐伟 蒋宏 朱剑 吴玉[2] 韩文文 张永恒 钟康惠[3] 王四利 张辑 XU Wei;JIANG Hong;ZHU Jian;WU Yu;HAN Wenwen;ZHANG Yonghen;ZHONG Kanghui;WANG Sili;ZHANG Ji(Research Institur No.280,CNNC,Guanghan 618300,Sichuan,China;Key Laboratory of Uranium Exploration and Evaluation Technology,Beijing Research Institute of Uranium Geology,CNNC,Beijing 100029,China;School of Earth Sciences,Chengdu University of Technology,Chengdu 610059,Sichuan,China)

机构地区：[1]核工业二八〇研究所,四川广汉618300 [2]核工业北京地质研究院,中核集团铀资源勘查与评价技术重点实验室,北京100029 [3]成都理工大学地球科学学院,四川成都610059

出　　处：《铀矿地质》2020年第6期563-576,共14页Uranium Geology

基　　金：中国核工业地质局铀矿地质调查项目“黔中-黔西南地区铀矿资源调查评价”(编号:201922);“贵州省兴义地区铀-多金属矿调查评价”(编号:201922-1);中国核工业地质局铀矿地质科研项目“贵州兴义-云南师宗地区铀多金属关键控矿要素研究及远景预测”(编号:201922-2)联合资助。

摘　　要：为了研究工作区主要成矿元素地球化学特征,在贵州省兴义市大际山地区开展了1∶1万土壤地球化学测量,对土壤中相关元素含量分布、单元素异常、综合异常特征、元素相关性、异常元素组合特征开展了系统研究,结果表明:区内U、Au、Mo、Hg、As的异常规模大,异常多分布在断裂构造破碎带、蚀变带、地表矿化带中,构造-蚀变-矿化-地化异常条件优越,具有良好的成矿潜力。结合元素地球化学剖面特征与矿化信息,揭示了研究区土壤地球化学异常展布特征与构造-蚀变-矿化的密切联系;依据综合异常和地质信息,圈定了3片U、Au、Mo找矿有利地段,分别为下银厂(U-Au-Mo)找矿有利区、扁口洞-大际山村(U-Au-Mo)找矿有利区、石岩脚(U-Au)找矿有利区。各片区构造发育,具有多期次活动特征,地表见有大量黄铁矿化、褐铁矿化、汞矿化、碳酸盐化、硅化等,各片区异常耦合程度高,强度大、浓集中心明显,呈带状或面状产出,具有进一步研究的价值。For studying the geochemical characteristics of the main ore-forming elements,a 10,000 soil geochemical survey was carried out in Xiayinchang-Shiyanjiao area of Xingyi,Guizhou Province.With a systematic study on the distribution of related element content,single element anomaly,comprehensive anomaly characteristics,element correlation,and abnormal element combination characteristics,the anomalies of U,Au,Mo,Hg,and As elements in survey were found large in scale,and mostly distributed in fractured structural zones,altered zones,and surface mineralized zones.The anomalies are superior in tectonic-alteration-mineralization-geochemical conditions and have good metallogenic potentiality.Based on comprehensive anomalies and geological information,three prospects have been delineated,they are Xiayinchang(U-Au-Mo),Biankoudong-Dajishan(U-Au-Mo)and Shiyanjiao(U-Au).Each prospect is with structures of multi-phase activities,alrerartion of pyrite,limonite,mercury,carbonate,silicification,The anomalies in the prospects are strong and centrealized which are coupled to form a zone with some area,and worthy for further research.

关 键 词：铀多金属矿 金矿 土壤地球化学 兴义 大际山 

分 类 号：P618.2[天文地球—矿床学] P632.1[天文地球—地质学]