Such a transition cannot be explained by the fractional crystallization of Cr-magnetite, which would result in a continuous decrease rather than a sharp gap of Cr 2 O 3 of …
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fractional crystallization of magnetite from a homogeneous body of melt containing 57 ppm 118. Cr 3,25, with f O 2 between zero and one log unit below the quartz-fayalite-magnetite oxygen 119.
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However, fractional crystallization of magnetite (ρ = 5.1 ∼ 5.2 g/cm3) will locally significantly decrease the density of basaltic melt to induce simultaneous sinking of …
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You may choose among olivine, orthopyroxene, augite, plagioclase, ilmenite, and magnetite as fractionating minerals. Enter the weight percent proportions of those minerals you wish to …
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Compositional variability in lithophile and chalcophile elements records sulfide fractional crystallization across MSS and ISS magnetites and sulfide interaction with silicate …
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Assimilation and fractional crystallization modelling of the flows was carried out with 20% olivine, 25% clinopyroxene, 45% plagioclase and 10% titano-magnetite as fractionating …
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While magnetitites contain foliated plagioclase grains in non-cotectic proportions, the magnetite is characterized by a regular upwards-depletion of Cr which is best explained by …
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The Fe-oxides magnetite and ilmenite, and in particular chromite, are useful petrogenetic indicators in igneous rocks and provide valuable information on the composition …
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However, the conventional fractional crystallization model suggests that magnetite starts to crystallize at 1151 °C at around 10% fractional crystallization and continues to …
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fractional crystallization of magnetite from a homogeneous body. of melt containing 57 ppm Cr 3, 27, with f. O2. between zero and one. log unit below the quartz-fayalite …
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If it formed either by a process of fractional crystallization as a loose pile of settled crystals 3,4 or as a loose arrangement of chains of magnetite crystals nucleated against …
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Rhyolite-MELTS forced abundant Fe-Ti oxide (ilmenite or magnetite) crystallization during the early stage of magmatic evolution and thus a rapid depletion of TiO 2 (Zimmer et …
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The appinites are characterized by variable compositions, such as SiO2 contents of 47.82-61.74 wt.% and MgO of 10.61-2.61 wt.%, which resulted from the polybaric and multistage fractional ...
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P-T-H 2 O conditions during multistage fractional crystallization, ... The stoichiometric calculations revealed that these crystals have different proportions of magnetite …
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The Fe isotope fractionation owing to the extensive fractional crystallization of the magnetite can be testified by the concurrent δ 57 Fe Mt depletion along with the decreases of …
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However Ti-rich melts may reach ilmenite saturation before magnetite crystallization, even in oxidizing conditions, and in some cases may crystallize hemo-ilmenite without …
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This indicates that detectable Mg isotopic fractionation occurred in MgO-poor samples, probably through fractional crystallization of Mg-bearing Fe–Ti oxides. Further Mg …
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We present δ 56 Fe (56 Fe/ 54 Fe relative to standard IRMM-014) data from whole rock and magnetite of the Upper and Upper Main Zones (UUMZ) of the Bushveld Complex. …
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Binary plots of Cr versus Ti and V of the type 2 Cr-spinel from the Zhdanov deposit. The fractional crystallization trend was defined by Dare et al. (2012) according to magnetite …
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While fractional crystallization has been shown to influence the chemistry of igneous magnetite, the extent to which this process regulates the trace element composition of …
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δ 49 Ti of mineral separates and bulk rocks from the Kos volcano-plutonic system. Analyzed mineral phases: magnetite, olivine, biotite, plagioclase, quartz • A first δ 49 Ti bulk …
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There is increasing evidence to show that high field strength elements (e.g., Nb, Ta, Zr, Hf, and Ti) could mobile to some extent in magmatic-hydrothermal fluids (Tanis et al., …
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Fractional crystallization is understood to be an important process for Earth's magmatic systems and appears to be important wherever molten magma cools slowly enough to allow minerals to …
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Magnetite is a common accessory mineral and an indicator to magma evolution and sulfide fractional crystallization in magmatic Ni Cu sulfide deposits. The Kalatongke magmatic …
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As revealed by zircon Hf isotopes, F concentrations in amphibole and biotite and thermodynamic modeling of crystallization, the gabbronorites represent enriched lithospheric …
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Instead, the dataset illustrates a process of fractional crystallization from magnetite-calcite-apatite carbonatites to calcite carbonatites. Furthermore, we delve into the …
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Fractional crystallization, the opposite of partial melting, ... In calc-alkaline magmas, the iron is oxidized, leading to crystallization of magnetite. Consequently, when mafic minerals crystallize, iron is removed from the …
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Favorable conditions for the precipitation of large quantities of Ti magnetite were created by a lengthy period of fractional crystallization that resulted in the concentration of large amounts of …
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It also outlines a general multistage crystallization pathway involving a series of intermediates and explains how various strategies (e.g., pH and additives) modulate magnetite properties by influencing its intermediates …
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Mineralogical and chemical zonations observed in massive sulfide ores from Ni-Cu-platinum group element (PGE) deposits are commonly ascribed to the fractional …
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