2024 High apatite solubility in peraluminous melts

High apatite solubility in peraluminous melts

Author: fyii

August undefined, 2024

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 … 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.,...

The solubility of H2O in peralkaline and peraluminous granitic …

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. Web15 de mai. de 1991 · We have characterized the effects on solubility of pH, XH2O (addition of CO2), pressure (P = 1.0-3.0 GPa), temperature (T =800-1200 °C), and dissolved silicate and NaCl concentration. Fluorapatite solubility in pure H2O is low, not more than 0.4 wt% at all conditions… View on Royal Society Save to Library Create Alert Cite hannigram ship manifesto

Apatite dissolution into peraluminous haplogranitic melts: An ...

WebApatite is a group of phosphate minerals, usually hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH −, F − and Cl − ion, respectively, in the crystal.The formula of the admixture of the three … WebIn melts saturated with sillimanite or mullite, the effect of high Al content may be lower for the Qz-Or than for the Qz-Ab eutectic. The depression of the liquidus temperatures may … WebAbstract. Apatite (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 of Ap grain size, abundance (melt: Ap ratio), and melt ASI [alumina saturation index: mol. Al 2 O 3 /(Na 2 O + K 2 O + CaO)]. Between an ASI of 1-1.1 (metaluminous to mildly … ch4 atombindung

LETTER The solubility of H2O in peralkaline and peraluminous …

Solubility of apatite, monazite, zircon, and rutile in supercritical ...

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 … ch 4 appWeb11 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 ). ch4 asx

"Web1 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. " - High apatite solubility in peraluminous melts

High apatite solubility in peraluminous melts

Solubility of Monazite-Cheralite and Xenotime in Granitic Melts, …

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. 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 …

Did you know?

WebFor the peraluminous compositions, the solubility of H 2O decreases with the addition of 2 wt% Al 2O 3 to the HPG8 composition, then increases strongly with the further ad-dition … WebEnter the email address you signed up with and we'll email you a reset link.

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, … 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 …

Web7 de abr. de 2024 · Biotite is a Ti-, Fe-, and Mg-rich mineral, so the dehydration-melting of biotite generates melts with relatively high contents of TiO 2, total Fe 2 O 3 and MgO (Gou et al., 2016, 2024). Besides, breakdown of biotite occurs at a relatively higher temperature threshold than muscovite, e.g., at 1 GPa breakdown of biotite and muscovite decompose … Web1 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 …

Web1 de jan. de 1988 · Michael, B. Wolf; David London 1994: Apatite dissolution into peraluminous haplogranitic melts: An experimental study of solubilities and …

Web1 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 … hannigram wallpaperWeb1 de fev. de 2016 · The effect of phosphorus on manganocolumbite and mangaotantalite solubility in peralkaline to peraluminous granitic melts Yong Tang; Yong Tang 1 Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2 hannigriff podcastWebUnderstanding the role of impacts on early Earth has major implications to near surface conditions, but the apparent lack of preserved terrestrial craters > 2 Ga does not allow a direct sampling of such events. Ion microprobe U–Pb ages, REE abundances and Ti-in-zircon thermometry for impact produced zircon are reported here. These results from … ch4 appWebSince they have excess P 2 O 5 over CaO to form normative apatite, we here propose the term "perphosphorous granites". High phosphorus contents appear to be due to elevated apatite solubility in peraluminous granitic melts rather than … ch4 avionWebThe solubilities of zircon, rutile, manganocolumbite (MnNb2O6), manganotantalite (MnTa2O6), and the rare earth phosphates LaPO4, GdPO4, and YbPO4 in water-saturated haplogranitic melts containing 0–6 wt.% F were measured at 800° C and 2 kbar. The melt compositions investigated differ only in their F content, the proportions of Na, K, Al, and … ch4 as a compoundWebTwo separate series of hydrous experiments involving (1) imposing apatite saturation on a series of igneous rock compositions from basanite to rhyolite, and (2) crystallizing similar natural rock compositions … ch4 areaWebBased on experimental data, Harrison and Watson (1984) proposed a model of saturation behavior of apatite in crustal melts as a function of temperature and silica content. … ch4 atoms number