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Anhydrous partial melting of a fertile and depleted peridotite from 2 to 30 kb and application to basalt petrogenesis

Citation

Falloon, TJ and Green, DH and Hatton, CJ and Harris, KL, Anhydrous partial melting of a fertile and depleted peridotite from 2 to 30 kb and application to basalt petrogenesis, Journal of Petrology, 29, (6) pp. 1257-1282. ISSN 0022-3530 (1988) [Refereed Article]

Copyright Statement

Copyright 1988 Oxford University Press

DOI: doi:10.1093/petrology/29.6.1257

Abstract

Reversal experiments have been performed to check the method of Jaques & Green (1980) to determine equilibrium partial melts from peridotite compositions. Reversals of the Jaques & Green (1980) calculated equilibrium partial melt (CEPM) compositions have been carried out in two ways: (1) By running CEPM compositions at original P and T conditions and testing for multiple saturation in residual phases of the original experiments. (2) By sandwich/mixed experiments using the CEPM composition plus peridotite (either Hawaiian pyrolite or Tinaquillo lherzolite).

The glass (liquid) compositions from the first series of experiments show that the CEPM compositions of Jaques & Green (1980) are too olivine-rich. The glass (liquid) compositions from the second series of experiments define new olivine+orthopyroxene±clinopyroxene cotectics in a molecular normative tetrahedron. The new cotectics plot towards the Qz apex of the tetrahedron, away from the cotectics defined by the CEPM compositions of Jaques & Green (1980). Partial melt compositions have also been determined at 20 and 30 kb, using both the sandwich technique and the approach by modal analysis and mass balance.

The results of the experimental study are used to evaluate the petrogenesis of mid-ocean ridge basalts, Hawaiian tholentes and primary magmas in intraoceanic convergent margin settings.

Item Details

Item Type:Refereed Article
Keywords:peridotite melting experiments, mantle melting, Hawaiian pyrolite, Tinaquillo lherzolite, fertile, depleted, sandwich technique, reversals, MORB, Hawaii, Boninite, basalt petrogenesis
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
Author:Falloon, TJ (Dr Trevor Falloon)
Author:Green, DH (Professor David Green)
ID Code:98958
Year Published:1988
Web of Science® Times Cited:276
Deposited By:Earth Sciences
Deposited On:2015-03-10
Last Modified:2015-04-20
Downloads:0

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