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中文摘要：
镁铁质-超镁铁质岩浆结晶分离早期形成镁铁矿物,镁铁矿物中的Ni和Mg是相容元素。随着结晶分离作用的进行,Ni、Mg在硅酸盐岩浆及后形成的硅酸盐物质中的丰度下降。橄榄石中Ni含量及硅酸盐物质MgO/FeO比值都与母岩浆的相关值相关,据此可推断母岩浆的信息,它们之间可由实验测得的系数相联系。当岩浆饱和硫化物时,在结晶分离过程中硫化物珠滴会与镁铁硅酸盐物质一道析出,同时,与硫化物非饱和岩浆相比,过多的Ni会随之析出。这也反映在Ni、Mg含量比无硫化物分离时有更迅速的降低上。Ni、Mg含量变化值可以在VoiseysBay侵入体的模式曲线上反映出,加拿大Labrador的这一侵入体赋存了一个世界级的Ni-Cu-Co硫化物矿床。过去的作法是将侵入体中橄榄石的Ni、Mg含量与Simkin和Smith得出的各种火成岩中橄榄石的Ni、Mg含量相比较以确定Ni亏损,进而假定橄榄石来自硫化物饱和、有经济价值的岩浆。现在的研究显示这种简单的对比会导致错误。将样品数据与模式曲线对比并反映出侵入体矿物结晶堆积特征是重要的方法。使用这一方法,样品数据能很好地被模式曲线拟合。以在VoiseysBay的研究为例,当硫化物液相与硅酸盐矿物被去除...
英文摘要：
Both Ni and Mg are compatible in mafic minerals that form early during the fractional crystallization of mafic-ultramafic magma.Thus both decrease in abundance in the silicate magma,and thus in later-forming silicates as fractionation proceeds.The concentration of Ni in silicates such as olivine and the MgO/FeO ratio of the silicates are related to values in the magma from which the olivine crystallized by coefficients which have been experimentally determined and therefore can be used to infer information ...
同期刊论文项目
同项目期刊论文
Genesis of Concealed Cu-rich Ore Body in the Jinchuan Deposit, Northwestern China, and Its Prospecti
Compositional variations of olivine, clinopyroxene, plagioclase and apatite in the Panzhihua Fe-Ti-V
A new genetic model for the giant Ni-Cu-PGE sulfide deposits associated with the Siberian flood basa
Precise U–Pb zircon–baddeleyite age of the Jinchuan sulfideore-bearing ultramafic intrusion, western
Sulfur contents at sulfide-liquid or anhydrite saturation in silicate melts: Empirical equations and
Abundant Fe–Ti oxide inclusions in olivine from the Panzhihua and Hongge layered intrusions, SW Chin
Controls on the Fo and Ni contents of olivine in sulfide-bearing mafic-ultramafic intrusions: Princi
Applications of stable and radiogenic isotopes to magmatic Cu-Ni-PGE deposits: Examples and cautions
Cr-spinel/melt and Cr-spinel/olivine nickel partition coefficients from basalts, picrites and intrus
Origin of the inconsistent apparent Re–Os ages of the Jinchuan Ni–Cu sulfide ore deposit, China : Po
Textural and stable isotope studies of hydrothermal alteration in the Main Sulfide Zone of the Great
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