贵州关岭丙坝铜矿床地气微粒特征

为了查明地气微粒特征与隐伏矿体的关系,对贵州关岭丙坝铜矿床进行地气微粒采样,并用透射电子显微镜进行分析。研究结果表明:地气微粒存在形式有微粒聚合体和单个微粒,以微粒聚合体为主。单个微粒形态各异,有球状、板状、立方状、椭球状、条状、不规则状等,粒度一般在几纳米到300nm之间;微粒聚合体多呈链状、浑圆状、不规则状。微粒的元素组成与地下隐伏矿体具有较好的相关性,且发现较多微粒中含有高浓度的Fe、Mn、Pb、Zn等元素,这无疑对该矿区今后的地质找矿具有指导意义。此外,通过对比不同矿床的地气微粒特征,发现矿床类型不同,微粒的种类、成分、形态等特征有差异,但相同类型的矿床却具有较大相似性。矿床地气微粒特征与地下隐伏矿床具有较好相关性,在相似地质环境下形成的矿床微粒元素组成、大小大体上具有相似性,但其间的微粒组合、形态等仍会存在一定的差异性。因此,可以通过对隐伏金属矿床地气微粒特征的研究,建立不同矿床类型地气微粒特征模型。

Research on Geogas Particles from Bingba Copper Deposit in Guanling County of Guizhou Province

To find out the relationship between the characteristic of geogas particles and concealed deposit,geogas particles have been sampled from Bingba copper deposit in Guanling County of Guizhou Province,and analyzed by transmission electron microscope.The results revealed that geogas particles are in the form of particle aggregations and individual particles,of which the former is dominant.The shapes of individual particles are mainly spherical,platy,cuboidal,ellipsoidal,strip shaped,andirregular,with a size generally ranging from several nanometers to 300 nm.The shapes of particle aggregations are mainly chain-shaped,rounded,and irregular.The elemental composition of geogas particles shows a good correlation with concealed metal ore bodies.High concentrations of Fe,Mn,Pb,and Zn are found in many geogas particles,which have certain significance for future mineral exploration.Moreover,by comparing the characteristics of geogas particles from different concealed metal mines the authors find that the types,elemental composition and morphology of geogas particles are different in different types of deposits,but with great similarities over the same type of deposit.There is good correlation between characteristics of geogas particles in deposit and deep concealed deposit.There is a great similarity in elemental composition and sizes of particles under similar geological environment,though there still exist some differences in the combination of particles and shape.Therefore,by analyzing the characteristics of geogas particles from concealed metal deposits,models of geogas particles characteristics from different deposit types can be established which is of great value for concealed deposit exploration.