乌努格吐山斑岩型铜(钼)矿床地球化学勘查指标  

GEOCHEMICAL EXPLORATION INDICATORS FOR THE WUNUGETUSHAN PORPHYRY Cu(Mo) DEPOSIT

作　　者：梁胜跃[1] 马生明[2] 朱立新[3] 刘崇民[2] 徐明钻 

机构地区：[1]江苏省地质勘查技术院,江苏南京210007 [2]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [3]中国地质科学院,北京100037

出　　处：《物探与化探》2012年第2期184-191,共8页Geophysical and Geochemical Exploration

基　　金：国家科技支撑计划课题(2006BAB01A10)

摘　　要：对乌努格吐山斑岩型铜钼矿床进行地球化学勘查指标研究,通过探讨47种元素在矿床中的富集、贫化等分布特征,结合蚀变、矿化分带等因素,筛选了斑岩型铜(钼)矿床的地球化学勘查指标。[KK(SiO2)+KK(K2O)]/[KK(Al2O3)+KK(Na2O)+KK(CaO)+KK(Fe2O3)+KK(MgO)]、KK(K2O)/KK(Na2O)、KK(K2O)/KK(Rb)、CaO、MgO、Na2O等指标可以反映矿床的成矿环境,圈定矿床的蚀变范围及蚀变程度等;近矿指标Cu、Mo、Ge、W、Sn、F、Bi、S、Se、Hf等可以反映矿床的矿化程度、矿体产出位置等;远矿指标[KK(Pb).KK(Zn)×1000]/[KK(Cu).KK(Mo)]、[KK(As).KK(Sb).KK(Bi)]/[KK(Cu).KK(Mo)]、[KK(Au).KK(Ag)]/[KK(Cu).KK(Mo)]、As、Au、Ag、Te等可以突出找矿范围和找矿目标。这些指标既为本地区寻找同类型矿床提供了技术支持,也拓宽了其他类型矿床的找矿思路。同时,应用对数累计频率散点图确定指标的异常上(下)限,为实现指标定量化提供了有效范例。The Wunugetushan porphyry Cu（Mo） deposit is a typical porphyry Cu（Mo） deposit in the Ergun metallogenic belt.Based on the depletion and enrichment regularity of 47 elements and the alteration zone or mineralization characteristics,this paper has summarized geochemical indicators of this ore deposit.The metallogenic environment indicators such as [KK（SiO2）＋ KK（K2O）]/[KK（Al2O3）＋KK（Na2O）＋ KK（CaO）＋KK（Fe2O3）＋KK（MgO）],KK（K2O）/KK（Na2O）,KK（K2O）/KK（Rb）,CaO,MgO and Na2O can reflect the ore-forming environment and the alteration extent and delineate the alteration area.Cu,Mo,Ge,W,Sn,F,Bi,S,Se and Hf serve as the near-ore indicators,which can reflect the mineralization degree and even indicate the location of the ore body in this ore deposit;[KK（Pb）·KK（Zn）×1000]/[KK（Cu）·KK（Mo）],[KK（As）·KK（Sb）·KK（Bi）]/[KK（Cu）·KK（Mo）],[KK（Au）·KK（Ag）]/[KK（Cu）·KK（Mo）],As,Au,Ag and Te serve as the ore periphery indicators,which can enlarge the target of geochemical exploration.These geochemical exploration indicators could offer technical assistance to the prospecting for similar ore deposits in this area and broaden the geological exploration thinking for other types of ore deposits.The anomaly upper/lower limits of these geochemical exploration indicators can be determined by log cumulative frequency scatter diagram.

关 键 词：地球化学勘查指标 斑岩型铜(钼)矿床 乌努格吐山 成矿环境 

分 类 号：P632[天文地球—地质矿产勘探]