首页|Ni partitioning between olivine and highly alkaline melts: An experimental study
Ni partitioning between olivine and highly alkaline melts: An experimental study
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
Here, we present the results of 55 one atmosphere experiments conducted to determine the effects of Na_2O and K_2O on Ni-Mg partitioning between olivine and highly alkaline melts. The experiments were performed in the temperature range of 1250-1450 ?C at Ni/NiO buffer conditions using a crucible-supported loop technique, which allowed the alkali content to be kept constant in melts containing up to 12 wt% K_2O and up to 8 wt% Na_2O. Based on the obtained experimental data combined with 169 olivine-melt pairs from the literature, and using the Ni-Mg olivine-melt exchange reaction, we calibrated an equation to predict the Ni partitioning coefficient: The effects of Na_2O and K_2O on the Ni-Mg partitioning were found to be significant. Both K and Na along with Ti and Ca decrease the exchange equilibrium constant value, whereas Si increases it. The effect of K is more significant, than the effect of Na.
Olivine-melt Ni partitioningEmpirical equationAlkaline meltsExperimental petrology
Alina N. Koshlyakova、Alexander V. Sobolev、Stepan P. Krasheninnikov、Valentina G. Batanova、Alexander A. Borisov
展开 >
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygina st. 19, 119334 Moscow, Russia
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, Staromonetny 35, 109017 Moscow, Russia
NSTL
Elsevier
