Primary magmas and mantle temperatures
The composition of olivine phenocrysts in Hawaiian tholeiitic picrites and in Mid-Ocean Ridge picrites vary up to Mg91.3# and Mg92.1# respectively. The compositions and liquids temperatures of the magmas crystallizing the most magnesian phenocrysts can be estimated and we find that anhydrous liquids temperatures (at 1 bar pressure) of Hawaiian tholeiitic picrites average 1365°C, for E-MOR picrites average 1355°C, and for N-MOR picrites average 1335°C. Water contents of the magmas decrease in...[Show more]
|Collections||ANU Research Publications|
|Source:||European Journal of Mineralogy|
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