Signature spectrale de Fe2+ tétracoordonné dans les sphalérites; implications géochimiques  [Spectral signature of tetrahedrally co-ordinated Fe2+ in sphalerites; geochemical implications]

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Alternate Title:Spectral signature of tetrahedrally co-ordinated Fe2+ in sphalerites; geochemical implications
Authors:Cervelle, B.; Cesbron, F.; Drin, N.
Author Affiliations:Primary:
Univ. Pierre et Marie Curie, Lab. Minéral.-Cristallogr., Paris 75252, France
Volume Title:Comptes Rendus de l'Académie des Sciences, Série 2, Mécanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre
Source:Comptes Rendus de l'Académie des Sciences, Série 2, Mécanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre, 307(12), p.1449-1454. Publisher: Gauthier-Villars, Montrouge, France. ISSN: 0764-4450
Publication Date:1988
Note:In French with English summary. 12 refs.; illus. incl. 1 table
Summary:Diffuse reflectance (Rd) spectra recorded in the visible range under a microscope on powdered iron-rich sphalerites (> 0.1 wt.%) show that the diffuse reflectance value, measured for instance at 650 nm (R650d), is inversely proportional to the concentration of substitutional Fe2+ in sphalerite. This method, easier and faster than with an electron microprobe, is of some interest for the geochemistry of ore deposits, since the iron content in this sulphide is used as an indicator of the genetic conditions of an ore deposit. The study shows that R650d varies between 30 and 80% for sphalerites from stratabound deposits, and between 10 and 50% for those set in the basement. [M.L.]
Subjects:Ferrous iron; Iron; Iron sulfides; Metals; Mineralogy; Minerals; Spectra; Sphalerite; Substitution; Sulfides; Central Massif; Europe; France; Western Europe
Abstract Numbers:89M/3567
Record ID:1991074946
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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