Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites
The origin of large platinum-group mineral (PGM) nuggets inside chromitite schlieren in some Ural-Alaskan type ultramafic complexes has been assigned to orthomagmatic processes. A promising phenomenon which may provide new insights into the processes responsible for PGE mineralization formation, or...
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ftunivtasecite:oai:ecite.utas.edu.au:143715 2023-05-15T17:05:20+02:00 Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites Kutyrev, AV Kamenetsky, VS Sidorov, EG Abersteiner, A Chubarov, VM 2020 https://doi.org/10.1016/j.oregeorev.2020.103367 http://ecite.utas.edu.au/143715 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.oregeorev.2020.103367 Kutyrev, AV and Kamenetsky, VS and Sidorov, EG and Abersteiner, A and Chubarov, VM, Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites, Ore Geology Reviews, 119 Article 103367. ISSN 0169-1368 (2020) [Refereed Article] http://ecite.utas.edu.au/143715 Earth Sciences Geology Mineralogy and crystallography Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1016/j.oregeorev.2020.103367 2021-09-27T22:16:46Z The origin of large platinum-group mineral (PGM) nuggets inside chromitite schlieren in some Ural-Alaskan type ultramafic complexes has been assigned to orthomagmatic processes. A promising phenomenon which may provide new insights into the processes responsible for PGE mineralization formation, or at least place constraints on existing models, are the multiphase inclusions hosted in PGM which have been previously found in platinum nuggets from alluvial deposits. For the first time, this study examines multiphase inclusions hosted in isoferroplatinum nuggets from lode chromitite schlieren in almost unaltered dunite from the Matysken Ural-Alaskan type complex (Koryak Highlands, Far East Russia). These multiphase inclusions are comprised of diopside, hydrous silicates, apatite, plagioclase, K-feldspar, silica and other minerals that are distinctly different from the host dunite mineralogy. Taken together with similar mineral assemblages in Cr-spinel-hosted inclusions, these inclusions cannot be crystallization products of a mafic/ultramafic melt, but instead require an alternative explanation. We critically evaluate different genetic models and conclude that a range of fluid-assisted metamorphic processes should be involved in producing massive PGM within chromitite schlieren in dunites. Article in Journal/Newspaper Koryak eCite UTAS (University of Tasmania) Matysken ENVELOPE(172.015,172.015,61.688,61.688) Ore Geology Reviews 119 103367 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Mineralogy and crystallography |
spellingShingle |
Earth Sciences Geology Mineralogy and crystallography Kutyrev, AV Kamenetsky, VS Sidorov, EG Abersteiner, A Chubarov, VM Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites |
topic_facet |
Earth Sciences Geology Mineralogy and crystallography |
description |
The origin of large platinum-group mineral (PGM) nuggets inside chromitite schlieren in some Ural-Alaskan type ultramafic complexes has been assigned to orthomagmatic processes. A promising phenomenon which may provide new insights into the processes responsible for PGE mineralization formation, or at least place constraints on existing models, are the multiphase inclusions hosted in PGM which have been previously found in platinum nuggets from alluvial deposits. For the first time, this study examines multiphase inclusions hosted in isoferroplatinum nuggets from lode chromitite schlieren in almost unaltered dunite from the Matysken Ural-Alaskan type complex (Koryak Highlands, Far East Russia). These multiphase inclusions are comprised of diopside, hydrous silicates, apatite, plagioclase, K-feldspar, silica and other minerals that are distinctly different from the host dunite mineralogy. Taken together with similar mineral assemblages in Cr-spinel-hosted inclusions, these inclusions cannot be crystallization products of a mafic/ultramafic melt, but instead require an alternative explanation. We critically evaluate different genetic models and conclude that a range of fluid-assisted metamorphic processes should be involved in producing massive PGM within chromitite schlieren in dunites. |
format |
Article in Journal/Newspaper |
author |
Kutyrev, AV Kamenetsky, VS Sidorov, EG Abersteiner, A Chubarov, VM |
author_facet |
Kutyrev, AV Kamenetsky, VS Sidorov, EG Abersteiner, A Chubarov, VM |
author_sort |
Kutyrev, AV |
title |
Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites |
title_short |
Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites |
title_full |
Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites |
title_fullStr |
Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites |
title_full_unstemmed |
Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites |
title_sort |
silicate inclusions in isoferroplatinum: constraints on the origin of platinum mineralization in podiform chromitites |
publisher |
Elsevier Science Bv |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.oregeorev.2020.103367 http://ecite.utas.edu.au/143715 |
long_lat |
ENVELOPE(172.015,172.015,61.688,61.688) |
geographic |
Matysken |
geographic_facet |
Matysken |
genre |
Koryak |
genre_facet |
Koryak |
op_relation |
http://dx.doi.org/10.1016/j.oregeorev.2020.103367 Kutyrev, AV and Kamenetsky, VS and Sidorov, EG and Abersteiner, A and Chubarov, VM, Silicate inclusions in isoferroplatinum: Constraints on the origin of platinum mineralization in podiform chromitites, Ore Geology Reviews, 119 Article 103367. ISSN 0169-1368 (2020) [Refereed Article] http://ecite.utas.edu.au/143715 |
op_doi |
https://doi.org/10.1016/j.oregeorev.2020.103367 |
container_title |
Ore Geology Reviews |
container_volume |
119 |
container_start_page |
103367 |
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1766059844775706624 |