COMAGMAT-5:a new magma crystallization model designed to simulate mafic to ultramafic sulfide-saturated systems
A “sulfide version of the COMAGMAT-5 model is presented.It combines a newly proposed SCSS model with updated silicate mineral - melt geothermometers in a single algorithm designed to assess the effect of silicate melt saturation with a Fe-Ni sulfide immiscible liquid for the range of mafic to ultramafic magmas.A unique feature of the new COMAGMAT is its ability to calculate sulfide-silicate (±Fe-Ti oxides) proportions for multiply saturated mineral assemblages,as well as liquid lines of descent for residual melts and the composition of the iron-nickel sulfide liquid during mafic magma fractionation or post-cumulus solidification of cumulate piles.The predicted effect of Ni is to decrease sulfide solubility with increasing Ni content,leading to much lower values of SCSS in natural magmas compared to pure “FeS-solubility models.We will present the results of modeling SCSS in S-saturated oceanic glasses;“B-1 magma composition,a proposed parent for the Lower and Lower Critical zones of the Rustenburg Layered Suite,Bushveld Complex (Barnes et al.2010);and olivine-rich magmas of the Ioko-Dovyren dunite-troctolite-gabbronorite layered massif (Northern Trans-Baikalia,Russia).
A.A.Ariskin K.A.Bychkov L.V.Danyushevsky A.W.McNeill G.S Barmina G.S.Nikolaev
Vernadsky Institute of Geochemistry and Analytical Chemistry,Russian Academy of Sciences,Kosygin Str Centre for Ore Deposit Research(CODES),University of Tasmania,Private Bag 79,Hobart,7001,TAS,Austral
国际会议
贵阳
英文
13-16
2012-06-16（万方平台首次上网日期，不代表论文的发表时间）