High apatite solubility in peraluminous melts
Web11 de nov. de 2024 · As the solubility of apatite increases with melt aluminium saturation index ( Pichavant et al., 1992; Wolf and London, 1994 ), P concentrates in peraluminous melts during differentiation due to the lack of apatite precipitation ( Bea et al., 1994 ), a trend contrary to that observed in metaluminous melts ( Lee and Bachmann, 2014 ). Web5 de nov. de 2008 · High temperature granites are more prospective for mineralisation, both because of that higher temperature and because they have a greater capacity to …
High apatite solubility in peraluminous melts
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Weblower. This contrasts with the relatively high solubility of H 2O in LiAlSi 3O 8 melt relative to albite and orthoclase melts and implies that excess Li 2O is not contributing to the content of nonbridging O atoms in the melt as efficiently as the other alkalies. For the peraluminous compositions, the solubility of H 2O decreases with the addition
Web1 de out. de 1992 · APATITE DISSOLUTION INTO PERALUMINOUS HAPLOGRANITIC MELTS : AN EXPERIMENTAL STUDY OF SOLUBILITIES AND MECHANISMS M. B. … Web23 de ago. de 2024 · In our previous study on petrogenesis of quartz syenite and granite porphyry, the host rocks of the Late Mesozoic Shapinggou Mo deposit in the Qinling–Dabie orogenic belt, we found that the initial Sr isotopic composition of the host rocks is strongly affected by the degree of K-alteration. Here, we provide further isotopic evidence of the …
Web28 de fev. de 2024 · The concentrations of Nb and Ta in the peraluminous melt increased compared to those in the subaluminous melt upon dissolution of microlite, as well as of pyrochlore, whereas these concentrations decreased upon dissolution of … Web3 de abr. de 2024 · Nevertheless, these data further support the idea that (1) higher alumina activity environments of peraluminous melts are reflected in Al in zircon concentrations and (2) peraluminous melts can exhibit measureable changes in alumina activity over the temperature range of zircon crystallization. Both topics are addressed in the next two …
Web1 de mar. de 2024 · ABSTRACT. Fluid-absent and fluid-fluxed melting of muscovite in metasedimentary sources are two types of crustal anatexis to produce the Himalaya Cenozoic leucogranites. Apatite grains separated from melts derived from the two types of parting melting have different geochemical compositions.
WebVapor-saturated experiments at 200 MPa with peraluminous, lithophile-element-rich rhyolite obsidian from Macusani, Peru, reveal high miscibility of H2O and silicate melt … rbs software designer salaryWeb1 de out. de 1994 · In equilibrium runs with more strongly peraluminous compositions, however, Ap solubility increases linearly with ASI, to P205 ~ 0.63 wt% in melt at ASI = 1.3, and can be denned by a simple equation: P^O-, = -3.4 + 3.1 X ASI (R = 0.833), which agrees within error with previous calculations reported in the literature. sims 4 french maidWeb1 de dez. de 2024 · The inconsistency between measured and predicted phosphorus concentrations for the lower-temperature inclusions, however, cannot be explained by problems with the electron microprobe analyses of rehomogenized nanogranitoids and glassy melt inclusions, sequestration of phosphorus in major minerals and/or monazite, … sims 4 french clothes ccWeb1 de out. de 1992 · Apatite solubility in peraluminous liquids: Experimental data and an extension of the Harrison-Watson model. New experimental data at 750–1000°C, 2–5 kbar, and for peraluminous melt compositions show a dramatic increase of apatite solubilities and phosphorus melt contents when compared to metaluminous or peralkaline … rbs soft controlWebMontel et al. tion when they occur as unfractionated felsic rocks, it is (1988) showed that apatite is soluble in peraluminous clear that had the melts that produced those granites melts, while Wolf and London (1994) found experimen- undergone extended fractional crystallisation, signifi- tally that the solubility of apatite in a haplogranite … rbssn hospetWebThe solubility of apatite in anatectic melt plays an important role in controlling the trace-element compositions and isotopic signatures of granites. The compositions of glassy melt inclusions and nanogranitoids in migmatites and granulites are compared with the results of experimental studies of apatite solubility to evaluate the factors that influence apatite … rbs silver accountWeb3 de jul. de 2015 · New experimental data on the solubility of lithium (Li) at spodumene (LiAlSi 2 O 6) and petalite (LiAlSi 4 O 10) saturation at 500 MPa and 550–750 °C reveal … sims 4 freezer cc