再论元素丰度的成矿学意义

Further on the metallogeny significance of elemental abundance

成矿作用的最基本单元是元素,丰度对于元素的富集成矿具有数量上的深刻约束。元素丰度通过质量作用效应决定了元素的地球化学性质或行为,使其成矿学意义不仅仅局限于宏观领域或战略层面;性质因素则反作用于丰度的亏损或增益,其中蕴含着质量约束的不确定性;地球化学继承性则意味着质量作用效应的传递。元素丰度对矿床形成的影响或主要取决于成矿对物质来源的依赖,依赖形式是从丰度全量到有效分量、从静态物源到动态物源。大型矿床的成因很可能与地壳丰度时-空分配的不均一性有关,成矿过程本身实质上并无显著性差异,丰度及丰度关系继承了岩石成因。

The basic units of mineralization,chemical elements,are abundant and significant in ore metals. This abundance may exert significant influence on elemental geochemical properties or behaviors in the light of mass action effect.Metallogeny significance is not macro-scopically or strategically limited.The properties may feed back from the depletion or enrichment of the original abundance of some elements,implying uncertainties of the mass action.Geochemical inheritance means a transmission of mass action effect.It is concluded that the controlling of elemental abundance on the genesis of mineral deposit should depend on the dependence of materi-al source during ore-forming processes,from abundance to available part consumed by ore-and rock-forming flu-ids;or from staticto dynamicmaterial source.Genesis of giant deposit is potentially associated to the heterogene-ously spatiotemporal partition of crustal abundance of metals,while minerogenetic processes themselves present no essentially significant difference.In addition,it is elemental abundance and abundance relationship that in-herit the petrogenesis.