Le contexte minéralogique des gisements d'opale de la région de Sao Geraldo do Araguaia, état de Para (Brésil)  [The mineralogical framework of opal deposits in the Sao Geraldo do Araguia region, Para, Brazil]

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Alternate Title:The mineralogical framework of opal deposits in the Sao Geraldo do Araguia region, Para, Brazil
Authors:Gauthier, J. P.; Bittencourt Rosa, D.; Rantsordas, S.; Sarnama, J. C.
Author Affiliations:Primary:
Université de Lyon I, Laboratoire Dynamique de la Lithosphère, Villeurbanne, France
Other:
Universidade Federal de Mato Grosso, Brazil
ENS Géologie de Nancy, France
Volume Title:Revue de Gemmologie A.F.G.
Source:Revue de Gemmologie A.F.G., Vol.149, p.11-14. Publisher: Association Française de Gemmologie, Paris, France. ISSN: 0398-9011
Publication Date:2004
Note:In French. 6 refs.
Sections:Gemstones
Subjects:Framework silicates; Gems; Metaigneous rocks; Metamorphic rocks; Metavolcanic rocks; Opal; Silica minerals; Silicates; Thin sections; Brazil; Para Brazil; South America; Sao Geraldo do Araguia Brazil
Coordinates:S095000 N024000 W0460000 W0592000
Abstract Numbers:04M/3849
Record ID:2004056610
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique, Vandoeuvre-les-Nancy, France
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