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钼的化学性质和地球化学特性及其找矿意义

     

摘要

通过对钼的化学性质、地球化学特性及找矿意义的归纳分析,揭示了钼作为地球上的稀有金属的高温成矿特性,其工业用途也是基于元素的化学性质展开的科研成果。钼的地球化学性质与其电子层结构有关,主要表现为亲铁性,在自然界形成的矿物主要为辉钼矿,其相对稳定,但在1亿~2.5亿年地质历史的风化剥蚀过程中,作为类质同像混入物的钼从长石等矿物晶格中逐步解离,形成水系沉积物迁移。而土壤(岩屑)风化物质则残留原地。在进行地球化学找矿过程中,需认真分析水系沉积物和土壤风化残积物的关系,在水系沉积物异常≥5×10-6、土壤(岩屑)异常≥10×10-6的范围内,具一定规模的工业钼矿床即可被发现。近10年来,我国发现和探明的一系列超大型、大中型斑岩型钼矿床的客观事实就是最好例证。%Through sum up and analysis of the chemical properties,geochemical characteristics and prospecting sig-nificances,this paper basically shows,the high temperature metallogenic features of the element molybdenum ,as a rare metal on the earth.Moreover,its industrial use is also based on the scientific research results of the chemical properties.The geochemical properties of molybdenum is related to its electronic structure,with a ferric feature, and the forming minerals mainly are relatively stable mineral molybdenite,but in the geological history of 1 to 250 million years weathering errosion process,as an isomorphism interfused matter,the molybdenum has been dissocia-ted from mineral lattice,such as feldspar,etc.and formed a stream sediment migration,while the weathering soil (debris)materials residue was in situ.In the process of geochemical prospecting,we need carefully study on the relationship between the stream sediment and weathering soil residues,when the anomaly of stream sediments are 5 ×10 -6 or higher,soil (debris)anomaly are 10 ×10 -6 or more,certain scale of industrial molybdenum deposit could be found.Above all,a series of super large,large and medium-sized porphyry molybdenum deposits which were found and proved up in recent 10 years in our country is an objective fact and the best example.

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