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Ti、Zr、Y和Nb都是高场强度的元素(按电荷/半径比值)。因此,它们通常不能在含水的流体中运移,也许当这些流体含有非常活跃的复杂溶剂(如F~-)时除外,并且它们在遭受交代蚀变作用的岩石中也保持不受影响。把这种性质与这些元素在新鲜熔岩里的系统变异结合在一起考虑,这就意味着在许多场合下,可利用这些元素来研究矿物和化学成分受到很大影响的交代和风化的玄武岩,以作出有意义的解释。至今,多数研究限于将有争议的变玄武岩与不同环境下喷发的新鲜玄武岩中这些元素浓度之间的经验比较。这些研究没有引伸到岩石成因模式的主要原因是缺少在不同温度和岩浆成分范围内分配系数的资料。
Ti, Zr, Y and Nb are all elements of high field strength (in charge / radius ratio). Therefore, they usually can not migrate in aqueous fluids, except when these fluids contain very active and complex solvents such as F ~ - and they remain unaffected in rock subjected to metasedimentary alteration. Considering this property in conjunction with the systematic variation of these elements in fresh lava means that on many occasions these elements can be used to study the metaspended and weathered basalts where the mineral and chemical composition are greatly influenced by Make a meaningful explanation. To date, most studies have limited the empirical comparison between the concentrations of these elements in controversial basalt basalt and fresh basalts erupted in different environments. The main reason that these studies did not extend into the genesis of the rock is the lack of data on the distribution coefficients at different temperatures and magmatic components.