杨成富,刘建中.贵州灰家堡背斜构造蚀变体岩石地球化学特征[J].贵州地质,2017,34(1):18-25
贵州灰家堡背斜构造蚀变体岩石地球化学特征
Rock Geochemical Characteristics of Structural Alteration in Huijiabao Anticline
  
DOI:
中文关键词:  构造蚀变体  地球化学  卡林型金矿  灰家堡背斜
英文关键词:Structural alteration  Geochemistry  Karlin-type gold deposit  Huijiabao anticline
基金项目:贵州省地矿局《黔西南‘大厂层’岩石地质地球化学及金锑矿成矿作用和成矿潜力》[黔地矿发(2009)11号]、中国地质调查局《贵州贞丰整装勘查区金-铀多金属控矿因素研究》[科(2013)01-055-002]、中国地质调查局《贵州贞丰-普安金矿整装勘查区关键基础地质研究》[科(2014)04-025-053]联合资助。
作者单位
杨成富 1.贵州省地质矿产勘查开发局105地质大队贵州贵阳5500182.中国地质大学(北京) 北京100083 
刘建中 贵州省地质矿产勘查开发局105地质大队贵州贵阳550018 
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中文摘要:
      灰家堡背斜构造蚀变体(SBT)为产出于茅口租(P2m)和龙潭组(Pl)之间不整合面上的一套强硅化灰岩、灰岩角砾岩、硅化粘土岩角砾岩组合。分析采自构造蚀变体样品的岩石地球化学特征,对区内钻孔揭露SBT及赋存于其中的Ⅰa矿体厚度及品位进行统计并绘制等值线图,探讨SBT地质地球化学特征对金成矿的制约。结果显示,SBT以角砾状构造和强硅化蚀变为显著特征,具有普遍较高的硅含量(54.02%92.24%),钙、铝、镁、钾、钠等主量元素的含量较低;而SBT及其围岩微量元素对大陆地壳标准化图解具有相似的曲线型式,呈显著的Au、As、Sb、Hg富集,表明在热液蚀变过程中热液流体与角砾岩的水岩反应对其微量元素组成未造成明显的改变;通过相关性分析,Cd、Te、Sr与Au关系密切,显示Cd、Te具有明显的富集,而Sr亏损。Cd、Te、Sr的异常对金矿化有指示意义;SBT中矿体的品位和SBT厚度呈正相关性,但矿体厚度和SBT厚度关系不甚明显,表明一定厚度的SBT可能更有利于Au的富集成矿。
英文摘要:
      The structural alteration in Huijiabao anticline occurs in a assemblage of intensified silicalites,limestone breccia and silicified clay which on a disconformity plane.According to the rock geochemical characteristics of samples,it counted up the thickness and grade of drill and Ia orebody and draw the isotope map,the restriction of rock geochemical characteristics to gold is discussed.The results shows breciated structure and intensified silicalites are the obvious features,has high silicalites ω(B)= 54.02 - 92.24×10-2,the content of Ca,Al,Mg,K and Na is low,SBT and its nearby wallrock rare elements are similar to continental crust standard charm,shows the enrichment of Au,As,Sb and Hg,the reaction of hydrothermal liquid and breccia didn’t make obvious change to the rare elements assemblageThe relation of Cd,Te,Sr and Au are close,shows the enrichment of Cd and Te,but Sr is defectiveThe anomaly of Cd,Te and Sr are very important for gold mineralization,the orebody grade is positively related to the SBT thickness,but the relation with SBT thickness is not obvious,it means that the SBT thickness may influence the Au concentration.
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