“结晶分异作用（crystallization differentiation），又称分离结晶作用（fractional crystallization），发生于岩浆结晶作用阶段，是指早期晶出的高熔点矿物由于某种原因在岩浆不同部位中呈不同程度的聚集，甚至发生分离，而形成各种成分岩浆岩的作用。

2020年12月1日 · According to the comprehensive study on the two plutons including petrography, mineralogy, petrology and whole-rock geochemical composition, we suggest that the fractional crystallization processes of Himalayan leucogranites can be ascribed to two main mechanisms, which are in-situ differentiation and flowage differentiation, respectively.

2004年10月15日 · Partition coefficient based crystal fractionation models are developed that track changes in refractory lithophile major and trace element ratios in the residual magma (e.g. convecting mantle). Monomineralic crystallization of majorite or Mg-perovskite is limited to less than 5% before certain ratios fractionate beyond convecting mantle values.

2021年4月1日 · A complete understanding of the inner workings of magma chambers relies on answering three fundamental questions: Where do crystallization and differentiation occur? Why do crystallization...

One of the most important of recent developments is a growing appreciation of the effect of oxidation, while another is concern with the effect of high total pressures on crystallization, partial melting, and differentiation, with particular reference to the origin of basaltic (or gabbroic) and andesitic magmas.

2025年1月15日 · The main mineral assemblage in basaltic samples are plagioclase, augite, and Mg-rich olivine, whereas trachytes and rhyolites mainly consist of alkali-feldspar, ferroaugite, fayalite together with quartz, monazite and plenty of Fe-Ti oxides, which exhibits a crystallization differentiation trend.

2024年12月15日 · Curves of crystallization-differentiation from thermodynamic modeling and experimental studies suggest that the Liquid Lines of Descent (LLD) of fractionating basaltic magmas differentiate relatively rapidly through intermediate compositions, owing to a coupled increase in silica contents with crystal productivity and latent heat release (e.g ...

2006年1月1日 · Crystallization diagram for the modeled olivinepyroxene-plagioclase system that was used to develop the early models for basaltic magma differentiation in a chamber [4-6].

We review igneous experimental data designed to understand fractionation processes in the roots of magmatic arcs, focusing on fractional crystallization experiments in dry and hydrous basalts …

We review four lines of evidence that have been presented in support of a dominantly crustal origin for these granites: 1) field observations; 2) isotopic compositions; 3) the missing cumulate problem; and 4) the bimodal distribution of igneous rock composi-tions.