High apatite solubility in peraluminous melts
Web1 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 … 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 ).
High apatite solubility in peraluminous melts
Did you know?
Web30 de abr. de 2004 · The fact that the solubility of apatite in metaluminous and peralkaline magmas is a function of melt composition and temperature was confirmed experimentally Watson and Capobianco, 1981, Green and Watson, 1982, Harrison and Watson, 1983, as was the considerably higher apatite solubility in peraluminous melts, where the … WebVapor-saturated experiments at 200 MPa with peraluminous, lithophile-element-rich rhyolite obsidian from Macusani, Peru, reveal high miscibility of H2O and silicate melt …
WebFor subaluminous compositions (ASI=1), the distribution coefficient of phosphorus between alkali feldspar and melt, D [P]Af/m, is 0.3. This value increases to D [P]Af/m=1.0 at a melt ASI value of 1.3. The increase in D [P]Af/m with ASI is expected from the fact that excess Al promotes the AlPSi -2 exchange. Web8 de mar. de 2024 · We provide new experimental data of monazite, xenotime and U-Th-bearing cheralite solubility in slightly peralkaline to peraluminous granitic melts using dissolution and reverse (i.e.,...
Web1 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, … WebThe 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 …
Web开馆时间:周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆
WebApatite (Ap) dissolution and solubility in the peraluminous haplogranite system were investigated in three sets of experiments at 750°C and 200 MPa (P H 2 o), as functions … ear neck throat specialistWeb1 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. earned 677 million in one day hedge fundWeb1 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. earned and incurredWebContexts in source publication Context 1 ... solubility, like the solubility of other rare-element minerals, is much higher in peralkaline melts than in metalu- minous to peraluminous... earned 5 dollaersWeb1 de abr. de 1997 · For the peraluminous compositions, the solubility of H 2 O decreases with the addition of 2 wt% Al 2 O 3 to the HPG8 composition, then increases strongly … earned allowanceWeb1 de jan. de 2024 · Monazite is a common accessory mineral in peraluminous, metaluminous and peralkaline granitic/rhyolitic rocks. Considering the importance of monazite in geochemical and geochronological studies,... ear neck and cheek pain after yawnWeb1 de out. de 1994 · The solubility of cerium-monazite (CePO4) in SiO2-Al2O3-K2O-Na2O melts was determined at 800 °C, 2 kbar, under water-saturated conditions. Dissolution … csv office打开乱码