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Calculated mineral equilibria for eclogites in CaO–Na2O–FeO–MgO–Al2O3–SiO2–H2O: application to the Pouébo Terrane, Pam Peninsula, New Caledonia (1999)

Carson ; Powell ; Clarke

Oxford, UK : Blackwell Science Inc

Journal of metamorphic geology 17 (1999), S. 0

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ISSN: 1525-1314

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geosciences

Notes: The high-P, medium-T Pouébo terrane of the Pam Peninsula, northern New Caledonia includes barroisite- and glaucophane-bearing eclogite and variably rehydrated equivalents. The metamorphic evolution of the Pouébo terrane is inferred from calculated P–T and P–T –XH2O pseudosections for bulk compositions appropriate to these rocks in the model system CaO–Na2O–FeO–MgO–Al2O3–SiO2–H2O. The eclogites experienced a clockwise P–T path that reached P≈19 kbar and T ≈600 °C. The eclogitic mineral assemblages are preserved because reaction consequent upon decompression consumed the rocks’ fluid. Extensive reaction occurred only in rocks with fluid influx during decompression of the Pouébo terrane.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1525-1314.1999.00177.x

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