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GEOREF RECORD

Inclusions of ruthenian rutile and titanian RuO (sub 2) in isoferroplatinum nuggets from Finnish Lapland

Pekka Tuisku
Inclusions of ruthenian rutile and titanian RuO (sub 2) in isoferroplatinum nuggets from Finnish Lapland (in Sulfosalts and much more; a tribute to Emil Makovicky, Yves Moelo (editor), Tonci Balic-Zunic (editor) and Robert F. Martin (editor))
The Canadian Mineralogist (April 2012) 50 (2): 511-521

Abstract

Rutile, ruthenian rutile and titanian ruthenium dioxide inclusions were found in isoferroplatinum nuggets obtained as by-products of gold sluicing in the historical gold-rush area of Finnish Lapland. Analytical data suggest that an extensive solid-solution exists between the end-member compositions TiO (sub 2) and RuO (sub 2) . Ruthenian phases occur almost exclusively with laurite inclusions in the nuggets, in some cases as inclusions and intergrowths in laurite, suggesting the primary nature of the ruthenian phases. The TiO (sub 2) phase is considered to be rutile rather than anatase or brookite, because there seems to be an extensive solid-solution between the TiO (sub 2) and RuO (sub 2) phases, and RuO (sub 2) is known to be isostructural with rutile. The abundant mafic and ultramafic metamorphosed intrusive and extrusive rocks occurring southwest of sluicing sites could represent source rocks of the isoferroplatinum nuggets. After the Cenozoic weathering event, the nuggets drifted in the Holocene ice sheets to their present position in till overlying the migmatitic to enderbitic bedrock of the Lapland granulite belt.


ISSN: 0008-4476
EISSN: 1499-1276
Coden: CAMIA6
Serial Title: The Canadian Mineralogist
Serial Volume: 50
Serial Issue: 2
Title: Inclusions of ruthenian rutile and titanian RuO (sub 2) in isoferroplatinum nuggets from Finnish Lapland
Title: Sulfosalts and much more; a tribute to Emil Makovicky
Author(s): Tuisku, Pekka
Author(s): Moelo, Yveseditor
Author(s): Balic-Zunic, Toncieditor
Author(s): Martin, Robert F.editor
Affiliation: University of Oulu, Department of Geosciences, Oulu, Finland
Affiliation: Universite de Nantes, Institut des Materiaux Jean Rouxel, Nantes, France
Pages: 511-521
Published: 201204
Text Language: English
Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada
References: 34
Accession Number: 2012-073407
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
N65°15'00" - N70°04'60", E20°15'00" - E30°04'60"
Secondary Affiliation: University of Copenhagen, DNK, Denmark
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Association of Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201238
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