Petrochemistry and origin of the Raudhamaren Ultramafites, Jotunheimen.
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- Artikler 
The ultramafites show gradual petrochemical variation and Mg\/Feratios indicative of crystallisation differentiation from stratiformtype mafic magma series. The country rocks with which they are inprimary association, however, have a calc-alkaline trend of evolution,more indicative of affiliation with th alpine type. The ultramafitesare essentially spinel peridotites thought to have formed in a dryenvironment by diapiric upwelling during the basaltic (gabbroic)evolution of the Upper Mantle.