FERRIC IRON CONTENT OF MINERAL INCLUSIONS IN DIAMONDS FROM GEORGE CREEK, COLORADO DETERMINED USING MOSSBAUER-SPECTROSCOPY

Authors
MCCAMMON CA CHINN IL GURNEY JJ MCCALLUM ME
Citation
Ca. Mccammon et al., FERRIC IRON CONTENT OF MINERAL INCLUSIONS IN DIAMONDS FROM GEORGE CREEK, COLORADO DETERMINED USING MOSSBAUER-SPECTROSCOPY, Contributions to Mineralogy and Petrology, 133(1-2), 1998, pp. 30-37
Citations number
29
Categorie Soggetti
Geochemitry & Geophysics",Mineralogy
Journal title
Contributions to Mineralogy and Petrology → ACNP
ISSN journal
00107999
Volume
133
Issue
1-2
Year of publication
1998
Pages
30 - 37
Database
ISI
SICI code
0010-7999(1998)133:1-2<30:FICOMI>2.0.ZU;2-5
Abstract
The Mossbauer milliprobe allows the determination of Fe3+/Sigma Fe in samples as small as 50 mu m. For the first time this technique is appl ied to a suite of diamonds of eclogitic paragenesis, where three garne t and five clinopyroxene inclusions in diamonds from George Creek, Col orado have been analysed. For garnet Fe3+/Sigma Fe ranges from 0-7%, w hile values for clinopyroxene range from 8-14%. These results are cons istent with the low oxygen fugacity conditions implied by the presence of the inclusions in diamond.