结晶分异作用

主量元素Harker图解表明，岩石成分变化与结晶分异作用无关，主要与岩浆起源有关。

Harker diagrams of major elements indicate that the changes of rock composition have nothing to do with the fractional crystallization , mainly with the origin of the magma .

它们很可能是由地壳硅铝层重熔的花岗岩浆经结晶分异作用而形成的。

It is most possible that the massifs are of magmatic origin from fractional crystallization of crust-remelted granitic magma .

单个岩床的厚度在1－200m之间，较厚的岩床有明显的结晶分异作用。

The thickness of sill varies from 1m to 200m .

元素地球化学研究表明，该岩体略为富集LREE，Eu的亏损不明显，表明岩浆结晶分异作用较弱；

According to the element geochemistry , these mafic dykes are characterized by moderate LREE enrichment and no obvious Eu anomalies , which means the weak magmatic fractionation .

这是岩浆结晶分异作用的显著特征。

This is the role of magmatic differentiation salient features . 4 .

结晶分异作用为花岗岩的主要成岩方式。

Crystallization differentiation for granite is the main diagenesis mode .

结晶分异作用中微量元素的行为以及熔体和固相成分的相互关系

Behaviours of trace elements and relationships between the compositions of solid phase and melt during crystallization differentiation

这些特征表明，本区三类主体岩石为岩浆结晶分异作用的产物；

All these characteristics show that three kinds of main body rock in this area are the product of crystallization differentiation .

我们认为在岩浆房中曾经有结晶分异作用、岩浆液态化学扩散作用及岩浆对流作用。

We suggest that crystal fractionation process , chemical diffusion of liquid magma and their convection have occurred in the magma chamber .

橄榄辉石岩包体为Ⅱ类包体，可能为杂岩体原始岩浆早期结晶分异作用所形成的堆积岩碎块。

Olivine-pyroxenites xenoliths belongs to ⅱ type of xenolith and the cumulate chunk maybe result from early crystallization differentiation of primary magma of the complex .

综合岩石学、地球化学和同位素等方面的对比研究，笔者认为八大石闪长质包体属于同源包体，为寄主花岗岩同源母岩浆经结晶分异作用形成的早期产物。

Petrologic , geochemical and isotopic studies prove that the Badashi dioritic enclaves are autoliths and the earlier products generated by crystal fractionation of the host granite parental magma .

岩浆演化过程中主要发生结晶分异作用，外来物质的混染作用较弱，混染物来自上地壳和俯冲板块。

The fractional crystallization is the main geological process in magmatic evolution , and contamination is weak . Two exotic components come from upper crust and / or subduction plate .

花岗岩具成矿专属性。花岗质岩浆中成矿元素行为受控于源岩成分、氧化状态、结晶分异作用和挥发组份。

Metallogeny related to granites is specialized to some magma and behavior of ore forming elements in granitic magmas is controlled by magmatic sources , oxidation status , crystallization fractionation and content of volatile components .

岩体以高铝、低镁铁组分，高锶、氧同位素比值为特征，地球化学研究显示它们是泥质岩的深熔作用和岩浆的结晶分异作用所形成的产物。

They are characterized by the high-Al and low-Fe and-Mg composition and high Sr and O isotope ratios . Geochemical study shows that they are the product of anatexis of argillaceous rocks and fractional crystallization of magmas .

微量元素的特征同时显示，早白垩世玄武岩部分熔融程度较低，早第三纪玄武岩部分熔融程度较高，且在不断的部分熔融过程中，形成的岩浆又有结晶分异作用发生。

The characteristics of trace elements also indicate that the Early Cretaceous basalts are the product of low degree partial melting and the Paleogene basalts of high degree partial melting with fractional crystallization occurred on the magma evolutionary processes .

火成岩石学研究中，通常仅根据岩套的化学变异来推断是否发生过结晶分异作用，而且认为结晶分异的主要机理是晶体在牛顿流体中的重力分离。

In the study of igneous petrology , the crystallization differentiation is usually proposed , only based on the chemical variation of rock suite , and its primary mechanism is regarded as gravitational segregation of crystals in the Newtonian fluid .

硫化铜镍工业富集需要相对稳定的构造环境，构造长期活动，使得含矿岩浆能够上侵到地壳浅部并发生良好的结晶重力分异作用和硫化物硅酸盐熔离作用，并进而富集成矿。

The industrial enrichment of Cu-Ni sulfide needs a relatively stable structure environment , and the long - time movement of structures makes ore magma invade into the shallow crust , gives rise to better crystallization , gravity differentiation and liquation of sulfides and silicates , and further forms ores .