Quartz-bearing C-O-H fluid inclusions diamond: Retracing the pressure-temperature path in the mantle using calibrated high temperature IR spectroscopy

Tomlinson, E. L. and McMillan, P. F. and Zhang, M. and Jones, A. P. and Redfern, S. A. T. (2007) Quartz-bearing C-O-H fluid inclusions diamond: Retracing the pressure-temperature path in the mantle using calibrated high temperature IR spectroscopy. Geochimica et Cosmochimica Acta, 71 (24). pp. 6030-6039. ISSN 0016-7037 DOI 10.1016/j.gca.2007.09.013

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Abstract

Infrared spectra of C-O-H micro-inclusions were collected from a micro-inclusion bearing diamond during step-heating and freezing experiments to examine fluid speciation as a function of pressure and temperature. The inclusions contain H2O, CO2, carbonate, apatite, quartz and mica, which together represent the oxidising remnant mantle fluid composition after diamond crystallisation. The internal pressure of the inclusions, measured from calibrated shifts of the quartz peaks, increases from 1.3 GPa at ambient temperature, to approximately 4-5 GPa at 737 °C, close to the conditions of crystallisation of the host diamond in the mantle.

Item Type: Article
Uncontrolled Keywords: should have been in 2007 AREP
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Geochimica et Cosmochimica Acta
Volume: 71
Page Range: pp. 6030-6039
Identification Number: 10.1016/j.gca.2007.09.013
Depositing User: Sarah Humbert
Date Deposited: 01 Jun 2009 13:27
Last Modified: 23 Jul 2013 09:55
URI: http://eprints.esc.cam.ac.uk/id/eprint/1051

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