Matches in SemOpenAlex for { <https://semopenalex.org/work/W2566186475> ?p ?o ?g. }
- W2566186475 abstract "We report the results of experiments designed to separate the effects of temperature and pressure from liquid composition on the partitioning of Ni between olivine and liquid, $$D_{text{Ni}}^{text{ol/liq}}$$ . Experiments were performed from 1300 to 1600 °C and 1 atm to 3.0 GPa, using mid-ocean ridge basalt (MORB) glass surrounded by powdered olivine in graphite–Pt double capsules at high pressure and powdered MORB in crucibles fabricated from single crystals of San Carlos olivine at one atmosphere. In these experiments, pressure and temperature were varied in such a way that we produced a series of liquids, each with an approximately constant composition (~12, ~15, and ~21 wt% MgO). Previously, we used a similar approach to show that $$D_{text{Ni}}^{text{ol/liq}}$$ for a liquid with ~18 wt% MgO is a strong function of temperature. Combining the new data presented here with our previous results allows us to separate the effects of temperature from composition. We fit our data based on a Ni–Mg exchange reaction, which yields $$ln left( {D_{text{Ni}}^{text{molar}} } right) = frac{{ -Delta _{r(1)} H_{{T_{text{ref}} ,P_{text{ref}} }}^{ circ } }}{RT} + frac{{Delta _{r(1)} S_{{T_{text{ref}} ,P_{text{ref}} }}^{ circ } }}{R} - ln left( {frac{{X_{text{MgO}}^{text{liq}} }}{{X_{{{text{MgSi}}_{ 0. 5} {text{O}}_{ 2} }}^{text{ol}} }}} right).$$ Each subset of constant composition experiments displays roughly the same temperature dependence of $$D_{text{Ni}}^{text{ol/liq}}$$ (i.e., $$-Delta _{r(1)} H_{{T_{text{ref}} ,P_{text{ref}} }}^{ circ } /R$$ ) as previously reported for liquids with ~18 wt% MgO. Fitting new data presented here (15 experiments) in conjunction with our 13 previously published experiments (those with ~18 wt% MgO in the silicate liquid) to the above expression gives $$-Delta _{r(1)} H_{{T_{text{ref}} ,P_{text{ref}} }}^{ circ } /R$$ = 3641 ± 396 (K) and $$Delta _{r(1)} S_{{T_{text{ref}} ,P_{text{ref}} }}^{ circ } /R$$ = − 1.597 ± 0.229. Adding data from the literature yields $$-Delta _{r(1)} H_{{T_{text{ref}} ,P_{text{ref}} }}^{ circ } /R$$ = 4505 ± 196 (K) and $$Delta _{r(1)} S_{{T_{text{ref}} ,P_{text{ref}} }}^{ circ } /R$$ = − 2.075 ± 0.120, a set of coefficients that leads to a predictive equation for $$D_{text{Ni}}^{text{ol/liq}}$$ applicable to a wide range of melt compositions. We use the results of our work to model the melting of peridotite beneath lithosphere of varying thickness and show that: (1) a positive correlation between NiO in magnesian olivine phenocrysts and lithospheric thickness is expected given a temperature-dependent $$D_{text{Ni}}^{text{ol/liq}} ,$$ and (2) the magnitude of the slope for natural samples is consistent with our experimentally determined temperature dependence. Alternative processes to generate the positive correlation between NiO in magnesian olivines and lithospheric thickness, such as the melting of olivine-free pyroxenite, are possible, but they are not required to explain the observed correlation of NiO concentration in initially crystallizing olivine with lithospheric thickness." @default.
- W2566186475 created "2017-01-06" @default.
- W2566186475 creator A5019467342 @default.
- W2566186475 creator A5037138772 @default.
- W2566186475 creator A5039613093 @default.
- W2566186475 creator A5040243049 @default.
- W2566186475 creator A5048599675 @default.
- W2566186475 date "2016-12-19" @default.
- W2566186475 modified "2023-10-07" @default.
- W2566186475 title "The effect of liquid composition on the partitioning of Ni between olivine and silicate melt" @default.
- W2566186475 cites W1507573241 @default.
- W2566186475 cites W1652144604 @default.
- W2566186475 cites W1696221871 @default.
- W2566186475 cites W1797474024 @default.
- W2566186475 cites W1873013960 @default.
- W2566186475 cites W1879999282 @default.
- W2566186475 cites W1896601192 @default.
- W2566186475 cites W1964815486 @default.
- W2566186475 cites W1966397334 @default.
- W2566186475 cites W1972729527 @default.
- W2566186475 cites W1978970844 @default.
- W2566186475 cites W1984316490 @default.
- W2566186475 cites W1989219425 @default.
- W2566186475 cites W1990740187 @default.
- W2566186475 cites W1993779743 @default.
- W2566186475 cites W2001781959 @default.
- W2566186475 cites W2003816434 @default.
- W2566186475 cites W2004488984 @default.
- W2566186475 cites W2005119727 @default.
- W2566186475 cites W2016648403 @default.
- W2566186475 cites W2021233135 @default.
- W2566186475 cites W2027453112 @default.
- W2566186475 cites W2029330897 @default.
- W2566186475 cites W2029407151 @default.
- W2566186475 cites W2029413171 @default.
- W2566186475 cites W2030870291 @default.
- W2566186475 cites W2035651914 @default.
- W2566186475 cites W2036158615 @default.
- W2566186475 cites W2037669719 @default.
- W2566186475 cites W2037833771 @default.
- W2566186475 cites W2039067288 @default.
- W2566186475 cites W2039086776 @default.
- W2566186475 cites W2039535921 @default.
- W2566186475 cites W2042056701 @default.
- W2566186475 cites W2042423268 @default.
- W2566186475 cites W2042692134 @default.
- W2566186475 cites W2043694778 @default.
- W2566186475 cites W2050480893 @default.
- W2566186475 cites W2051529086 @default.
- W2566186475 cites W2054699417 @default.
- W2566186475 cites W2055859870 @default.
- W2566186475 cites W2060401165 @default.
- W2566186475 cites W2065293072 @default.
- W2566186475 cites W2067505974 @default.
- W2566186475 cites W2067743341 @default.
- W2566186475 cites W2068670059 @default.
- W2566186475 cites W2071612360 @default.
- W2566186475 cites W2074256196 @default.
- W2566186475 cites W2076146440 @default.
- W2566186475 cites W2076369135 @default.
- W2566186475 cites W2076755830 @default.
- W2566186475 cites W2079032355 @default.
- W2566186475 cites W2085899324 @default.
- W2566186475 cites W2086540936 @default.
- W2566186475 cites W2090946850 @default.
- W2566186475 cites W2094663134 @default.
- W2566186475 cites W2097428626 @default.
- W2566186475 cites W2100029905 @default.
- W2566186475 cites W2103507727 @default.
- W2566186475 cites W2105608513 @default.
- W2566186475 cites W2109376143 @default.
- W2566186475 cites W2109622426 @default.
- W2566186475 cites W2112622604 @default.
- W2566186475 cites W2113821942 @default.
- W2566186475 cites W2115174258 @default.
- W2566186475 cites W2123491285 @default.
- W2566186475 cites W2125171601 @default.
- W2566186475 cites W2127503576 @default.
- W2566186475 cites W2130358791 @default.
- W2566186475 cites W2131157768 @default.
- W2566186475 cites W2133091338 @default.
- W2566186475 cites W2135595053 @default.
- W2566186475 cites W2137551955 @default.
- W2566186475 cites W2137973240 @default.
- W2566186475 cites W2138534190 @default.
- W2566186475 cites W2141375290 @default.
- W2566186475 cites W2142245711 @default.
- W2566186475 cites W2143830780 @default.
- W2566186475 cites W2145493831 @default.
- W2566186475 cites W2146059010 @default.
- W2566186475 cites W2148501813 @default.
- W2566186475 cites W2151041036 @default.
- W2566186475 cites W2156212191 @default.
- W2566186475 cites W2157987160 @default.
- W2566186475 cites W2161394298 @default.
- W2566186475 cites W2165975276 @default.
- W2566186475 cites W2167448438 @default.
- W2566186475 cites W2184023867 @default.
- W2566186475 cites W2325154331 @default.
- W2566186475 cites W2498389000 @default.