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Phase relations and melting of nominally 'dry' residual eclogites with variable CaO/Na2O from 3 to 5 GPa and 1250 to 1500 °C; implications for refertilisation of upwelling heterogeneous mantle

Rosenthal, Anja; Yaxley, Greg; Crichton, A. Wilson; Kovacs, I; Spandler, Carl; Hermann, Joerg; Sándorné, K. Judith; Rose-Koga, Estelle; Pelleter, Anne-Aziliz

Description

This study investigates the phase and melting relations of nominally ‘dry’ residual eclogites (Res2 and Res3), with varying bulk CaO/Na2O ratios (4 and 12, respectively), from ~160 (5 GPa) to ~90 km (3 GPa) depth. Garnet, clinopyroxene and minor quartz/coesite are subsolidus phases in both compositions. In contrast to Res2, in Res3, the proportions of garnet always exceeding those of clinopyroxene. This also leads to higher modal quartz/coesite in Res3 relative to Res2. In modelling melting...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
URI: http://hdl.handle.net/1885/197772
Source: Lithos
DOI: 10.1016/j.lithos.2018.05.025

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