夏日哈木西地区找矿前景地球化学预测  

Delineation of comprehensive anomalies of prospecting direction in Xiarihamuxi area

作　　者：保善东[1] 赵明福 熊寿加 李得顺 李方成 祝克禄 BAO Shandong;ZHAO Mingfu;XIONG Shoujia;LI Deshun;LI Fangcheng;ZHU Kelu(Qinghai geological survey institute,Key Laboratory of geological processes and mineral resources in the northern qinghai-tibet Plateau,Xining 810012, China;Qinghai Provincial Geological Survey,Xining 810008, China)

机构地区：[1]青海省地质调查院青海省青藏高原北部地质过程与矿产资源重点实验室,西宁810012 [2]青海省地质调查局,西宁810008

出　　处：《物探化探计算技术》2021年第6期807-817,共11页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：青海省省级财政资金地质勘查项目(2019048009jc001,2020021010jc001)。

摘　　要：通过对夏日哈木西地区1∶25×10^(4)地球化学测量数据处理发现,研究区大干沟组和祁漫塔格群地层及晚志留世闪长岩中,Ag、As、Au、Ni、Sb、Cu、Mo、Zn、Bi、Hg、Cr、W、Pb、Sn等元素富集程度较高,并确定出研究区5种不同类型成矿成岩的指示元素组合。结果表明,以上元素基本上都具有变异系数大且离群子集较大的特点,且与研究区已知矿化类别吻合程度很高。综合分析各元素丰度、富集离散和分布特征及元素之间相关性等,结合成矿地质条件及综合异常的研究,圈定出拉陵灶火上游钴多金属找矿靶区、拉陵高里河沟脑银多金属找矿靶区、拉陵高里河沟口铜多金属找矿靶区及拉陵灶火河西金铜找矿靶区等4处,为进一步地质找矿工作打下了坚实的基础。According to the data processing of 1∶25,000 geochemistry in the Xiarihamuxi,it is found that in the strata and Late Silurian Diorites of the Dagangou formation and Qimantage group in the study area,Ag,As,Au,Ni,Sb,Cu,Mo,Zn,Bi,Hg,Cr,W,Pb,Sn and other elements are highly enriched.The results show that the above elements basically have a large coefficient of variation and a large subset of the outlier characteristics,and with the known mineralization type in the study area with a high degree of coincidence.Based on a comprehensive analysis of the characteristics of abundance,enrichment,dispersion,distribution and correlation among elements,and combined with the study of ore-forming geological conditions and associated abnormal areas,the cobalt-polymetallic prospecting targets in the Lalingzaohuoshangyou,the silver-polymetallic prospecting targets in the Lalinggaolihegounao,the copper-polymetallic prospecting targets in the Lalinggaolihegoukou and the gold-copper prospecting targets in the Lalingzaohuohexi have been delineated,it has laid a solid foundation for further geological prospecting work.

关 键 词：地球化学 异常评价 找矿靶区预测 夏日哈木西 

分 类 号：P632[天文地球—地质矿产勘探]