山东乳山金矿床流体包裹体爆裂曲线特征及其找矿意义  

Characteristics of decrepitation curves of fluid inclusions in Rushan gold deposit,Shandong Province

作　　者：程伟 沈昆 田秀林 王强 谢奕汉[2] 于雷亨 瞿友兰 

机构地区：[1]山东省地质科学实验研究院,山东济南250013 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《矿床地质》2011年第4期699-710,共12页Mineral Deposits

基　　金：山东省地质勘查科研项目(鲁勘字[2006]15号);国土资源部公益性行业科研专项(课题编号200911043-03)共同资助

摘　　要：流体包裹体爆裂法作为一种辅助找矿手段,可用于找矿勘探实践中。文章通过对山东半岛乳山金青顶石英脉型金矿花岗岩围岩、蚀变岩石和含金石英脉采样和分析,发现花岗岩围岩石英的爆裂曲线具有高的爆裂频次,起爆温度接近300℃,在大约360~450℃和573℃（α-石英/β-石英相变温度）分别有明显宽的爆裂峰和窄的尖锐爆裂峰;而含金石英脉的爆裂频次、爆裂峰强度和相变峰高相应降低,从而围绕矿体构成蒸发晕负异常;虽然这不同于以往的研究结果,即：围绕矿床出现蒸发晕正异常,但对于胶东地区金矿找矿勘探工作仍具有一定的应用价值。The decrepitation method of fluid inclusions can be used as a supplementary means in combination with other methods in mineral exploration.Based on sampling and decrepitation analysis of granitic and altered wall rocks and auriferous quartz veins from the Rushan quartz vein type gold deposit,the authors reveal that the granitic wall rock has high decrepitation intensity（frequency）,pronounced decrapitation peak with normal distribution in the temperature interval of ca.360～450℃ and a sharp peak at 573℃ which is the phase transition temperature of α/β-quartz,whereas the auriferous quartz veins exhibit lower decrepitation frequency,lower decrepitation peak from 360 to 450℃ and weak peak at 573℃;consequently,negative anomalies of vapor aureole occur in/around the ore bodies.Although this phenomenon is in contrast to many decrepitation studies of ore deposits where positive anomalies of vapor aureole occur in/around the ore bodies,it can still be applied to gold exploration in Shandong Peninsula.

关 键 词：地球化学 流体包裹体 爆裂法 蒸发晕负异常 乳山金矿 山东半岛 

分 类 号：P618.51[天文地球—矿床学]