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GEOREF RECORD

Applications of Auger-electron spectroscopy to geochemistry

H. Wayne Nesbitt and Allen R. Pratt
Applications of Auger-electron spectroscopy to geochemistry (in Microbeam techniques in the earth sciences, Frank C. Hawthorne (editor) and R. F. Martin (editor))
The Canadian Mineralogist (April 1995) 33, Part 2: 243-259

Abstract

The composition of the uppermost 50 Aa of mineral surfaces is readily determined by Auger electron spectroscopy; analytical spot-sizes of < 1 mu m can be achieved routinely and the concentration of most elements can be quantitatively determined at levels as low as 1/4-1 wt.%. Compositional depth-profiles through air-oxidized pyrrhotite surfaces are reported, demonstrating that Fe diffuses rapidly from the bulk to the surface of pyrrhotite grains during oxidation in air. Auger results for a goethite surface, combined with EPMA, show that Al is distributed throughout the bulk of the mineral, and that Ni is concentrated at the surface (uppermost 50 Aa); sensitivity factors for Fe and O in goethite are derived from the data. The technique is a boon to experimental petrologists and geochemists in that detection of Aangstrom-thick leached veneers and authigenic overgrowths helps to circumvent the ever-present problem of slow rates of reaction.


ISSN: 0008-4476
EISSN: 1499-1276
Coden: CAMIA6
Serial Title: The Canadian Mineralogist
Serial Volume: 33, Part 2
Title: Applications of Auger-electron spectroscopy to geochemistry
Title: Microbeam techniques in the earth sciences
Author(s): Nesbitt, H. WaynePratt, Allen R.
Author(s): Hawthorne, Frank C.editor
Author(s): Martin, R. F.editor
Affiliation: University of Western Ontario, Department of Earth Sciences, London, ON, Canada
Pages: 243-259
Published: 199504
Text Language: English
Summary Language: French
Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada
Meeting name: Special session of the GAC-MAC annual meeting
Meeting location: Waterloo, ON, CAN, Canada
Meeting date: 199?199?
References: 37
Accession Number: 1999-060101
Categories: General geochemistry
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199920
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