Skip Navigation


Journal of Petrology Advance Access originally published online on November 13, 2006
Journal of Petrology 2007 48(2):219-230; doi:10.1093/petrology/egl054
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Supplementary data
Right arrow An erratum has been published
Right arrow An erratum has been published
Right arrow All Versions of this Article:
48/2/219    most recent
egl054v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (5)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Bellis, A.
Right arrow Articles by Canil, D.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@ oxfordjournals.org

Ferric Iron in CaTiO3 Perovskite as an Oxygen Barometer for Kimberlitic Magmas I: Experimental Calibration

Anthony Bellis and Dante Canil*

School of Earth and Ocean Sciences, University of Victoria, 3800 Finnerty Road, Victoria, BC, V8W 3P6, Canada

RECEIVED OCTOBER 27, 2005; ACCEPTED AUGUST 30, 2006


  Abstract

A method to estimate the oxygen fugacity (fO2) during the crystallization of kimberlites is developed using the Fe content of CaTiO3 perovskite (Pv), a common groundmass phase in these rocks. With increasing fO2, more Fe exists in the kimberlitic liquid as Fe3+, and thus partitions into Pv. Experiments to study the partitioning of Fe between Pv and kimberlite liquid were conducted at 100 kPa on simple and complex anhydrous kimberlite bulk compositions from 1130 to 1300°C over a range of fO2 from NNO – 5 to NNO + 4 (where NNO is the nickel–nickel oxide buffer), and at Nb and rare earth element (REE) contents in the starting materials of 0–5 wt % and 1500 ppm, respectively. The partitioning of Fe between Pv and kimberlite liquid is influenced mostly by fO2, although the presence of Nb increases the partition of Fe3+ into perovskite at a given T and fO2. Multiple linear regression (MLR) of all the experimental data produces a relationship that describes the variation of Fe and Nb in Pv with fO2 relative to the NNO buffer:


Formula

(uncertainties at 2{sigma}, and Nb and Fe as cations per three oxygens). Over the range of conditions of our experiments, this relationship shows no temperature (T) dependence, is not affected by the bulk Fe content of the kimberlite starting material and reproduces experimental data to within 1 log fO2 unit.

KEY WORDS: kimberlites; oxygen fugacity; perovskite; ferric iron; magma

*Corresponding author. E-mail: dcanil{at}uvic.ca


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Eur J MineralHome page
Y. Fedortchouk and D. Canil
Diamond oxidation at atmospheric pressure: development of surface features and the effect of oxygen fugacity
European Journal of Mineralogy, June 1, 2009; 21(3): 623 - 635.
[Abstract] [Full Text] [PDF]

Home page
 Can MineralHome page
L. Melluso, M. Lustrino, E. Ruberti, P. Brotzu, C. de Barros Gomes, L. Morbidelli, V. Morra, D. P. Svisero, and F. d'Amelio
MAJOR- AND TRACE-ELEMENT COMPOSITION OF OLIVINE, PEROVSKITE, CLINOPYROXENE, Cr-Fe-Ti OXIDES, PHLOGOPITE AND HOST KAMAFUGITES AND KIMBERLITES, ALTO PARANAIBA, BRAZIL
Can Mineral, February 1, 2008; 46(1): 19 - 40.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.