The stishovite paradox in the evolution of lower mantle magmas and diamond-forming melts (experiments at 24 and 26 GPa)статья
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Дата последнего поиска статьи во внешних источниках: 12 февраля 2018 г.
Аннотация:Experimental studies of phase relations in the oxide-silicate system MgO-FeO-SiO2 at 24 GPa show that the peritectic reaction of bridgmanite controls the formation of stishovite as a primary in situ mineral of the lower mantle and as effect of the stishovite paradox. The stishovite paradox is registered in the diamond-forming system MgO-FeO-SiO2-(Mg-Fe-Ca-Na carbonate)-carbon in experiments at 26 GPa as well. The physicochemical mechanism of the ultrabasic-basic evolution of deep magmas nd diamond-forming media, as well as their role in the origin of the lower mantle minerals and genesis of ultradeep diamonds, are studied.