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The solidus of carbonated, fertile peridotite


Falloon, TJ and Green, DH, The solidus of carbonated, fertile peridotite, Earth and Planetary Science Letters, 94, (3-4) pp. 364-370. ISSN 0012-821X (1989) [Refereed Article]

Copyright Statement

Copyright 1989 Elsevier Science Publishers B.V.

DOI: doi:10.1016/0012-821X(89)90153-2


The solidus for a fertile peridotite composition ("Hawaiian pyrolite") in the presence of CO2 has been determined from 14 to 35 kbar. The solidus shape inP-T space is consistent with previous studies in the model system CaOMgOSiO2CO2. The intersection of the decarbonation reaction Olivine + Diopside + CO2 ⇌ Orthopyroxene + Dolomite with the pyrolite solidus defines the pointI6, which is located at 20.5 kbar, 1050C. At pressures less thanI6 the solidus is only slightly (2050C) below that of the volatile-absent (CH absent) solidus but at pressures greater thanI6 the solidus curve is approximately 275C below the volatile-absent solidus. The large depression of the solidus to lower temperatures with little change in pressure occurs at approximately 19 kbar, 1250C. At 26 kbar the Hawaiian pyrolite-CO2 solidus is approximately 100C higher than the solidus for Hawaiian pyrolite-H2OCO2 confirming that the primary sodic dolomitic carbonatite melt at the latter solidus does contain some dissolved water.

Item Details

Item Type:Refereed Article
Keywords:solidus fertile peridotite, Hawaiian pyrolite, CO2, sodic dolomitic carbonatite melt
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and metamorphic petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Falloon, TJ (Dr Trevor Falloon)
UTAS Author:Green, DH (Professor David Green)
ID Code:98831
Year Published:1989
Funding Support:Australian Research Council (88/18620)
Web of Science® Times Cited:174
Deposited By:Earth Sciences
Deposited On:2015-03-04
Last Modified:2015-04-22

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