A laser-Raman microprobe study of platinum-group minerals from the Munni Munni layered intrusion, West Pilbara Block, Western Australia

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Authors:Mernagh, Terrence P.; Hoatson, Dean M.
Author Affiliations:Primary:
Australian Geological Survey Organisation, Canberra, Australia
Volume Title:Microbeam techniques in the earth sciences
Volume Authors:Hawthorne, Frank C., editor; Martin, R. F.
Source:The Canadian Mineralogist, Vol.33(Part 2), p.409-417; Special session of the GAC-MAC annual meeting, Waterloo, ON, Canada, 199?, edited by Frank C. Hawthorne and R. F. Martin. Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada. ISSN: 0008-4476
Publication Date:1995
Note:In English with French summary. 31 refs.; illus., incl. 2 tables
Summary:The laser-Raman microprobe has been used to identify relatively small (up to 10 µm) grains of PGM in the mineralized layer just below the contact between the ultramafic zone and the gabbroic zone of the Archaean Munni Munni layered igneous complex. The Raman spectra of sperrylite, platarsite, moncheite, cooperite, braggite and potarite are reported for the first time, and their spectra are compared with those predicted from group theory. All Raman bands occur below 500 cm-1, and each PGM produces a distinct spectrum, thus allowing ready identification of each mineral. The technique requires little preparation of the sample and offers the advantage of high spatial resolution and relatively rapid identification of in situ µm-sized grains of PGM in silicate or sulphide matrices. [R.A.H.]
Subjects:High-resolution methods; Identification; Intrusions; Laser methods; Layered intrusions; Mafic composition; Metals; Mineralization; Platinum group; Raman spectra; Silicates; Spectra; Sulfides; Ultramafic composition; Australasia; Australia; Pilbara Craton; Western Australia; Munni Munni Complex
Abstract Numbers:96M/120
Record ID:1999060114
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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