Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization
Natural Fe-Ni alloys are common in meteorites and, presumably, the Earth's core, where they host significant platinum-group elements (PGE). However, little is known on PGE concentrations in hydrothermal or metamorphic Fe-Ni alloys (i.e., awaruite Ni3Fe) from terrestrial rocks. In this work, we...
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GEOSCIENCEWORLD
2023
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Online Access: | http://ir.qdio.ac.cn/handle/337002/183825 http://ir.qdio.ac.cn/handle/337002/183826 https://doi.org/10.2113/2023/lithosphere_2023_126 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/183826 2024-04-28T08:26:56+00:00 Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization Kutyrev, Anton Kamenetsky, Vadim S. Kontonikas-Charos, Alkiviadis Savelyev, Dmitry P. Yakich, Tamara Yu. Belousov, Ivan A. Sandimirova, Elena I. Moskaleva, Svetlana, V 2023 http://ir.qdio.ac.cn/handle/337002/183825 http://ir.qdio.ac.cn/handle/337002/183826 https://doi.org/10.2113/2023/lithosphere_2023_126 英语 eng GEOSCIENCEWORLD LITHOSPHERE http://ir.qdio.ac.cn/handle/337002/183825 http://ir.qdio.ac.cn/handle/337002/183826 doi:10.2113/2023/lithosphere_2023_126 Geochemistry & Geophysics Geology KAMCHATSKY MYS PENINSULA EASTERN KAMCHATKA GROUP MINERALS PGE MINERALIZATION OPHIOLITE COMPLEX SULFIDE MINERALS PLACER DEPOSITS CR-SPINEL ICP-MS LASER 期刊论文 2023 ftchinacasciocas https://doi.org/10.2113/2023/lithosphere_2023_126 2024-04-08T00:16:49Z Natural Fe-Ni alloys are common in meteorites and, presumably, the Earth's core, where they host significant platinum-group elements (PGE). However, little is known on PGE concentrations in hydrothermal or metamorphic Fe-Ni alloys (i.e., awaruite Ni3Fe) from terrestrial rocks. In this work, we examine the geochemistry of awaruite and related minerals from several placer deposits sourced from the suprasubduction ophiolitic (Kamchatsky Mys, Karaginsky Island, and Mamet) and Ural-Alaskan (Galmoenan) complexes of Kamchatka and the Koryak Highlands (Far East Russia) in order to assess the abundance of PGE in awaruite and constrain their mobility under metamorphic and hydrothermal conditions. Studied awaruite from ophiolitic and Ural-Alaskan type complexes formed via desulfurization of pentlandite during serpentinization. Three groups of platinum-group minerals (PGMs) are associated with awaruite from Kamchatsky Mys: (1) Pt-Fe alloys such as ferronickelplatinum (Pt2FeNi) or unnamed Ni2FePt alloys; (2) Os-Ir-Ru alloys of various composition; (3) Pd-Sb minerals which form together with serpentine during hydrothermal alteration. Despite the abundance of PGM inclusions, no significant PGE concentrations were measured in awaruite from the Kamchatsky Mys, Karaginsky Island, or Mamet ophiolites. In contrast, pentlandite relicts in awaruite from placers related to the Galmoenan Ural-Alaskan type complex contain exceptionally high, previously unreported, Os (up to 540 ppm). Awaruite that forms on behalf of this pentlandite does not show any significant Os enrichment. Rare Galmoenan awaruite analyses yield up to 3 ppm Pd. The new data are not in complete accordance with previous studies that reported relatively high (up to first 10 ppm) PGE content in awaruite. We attribute this to low PGE concentration in precursor sulfides and preferential partitioning of PGE into discrete secondary PGM within awaruite. Nevertheless, abundant inclusions of secondary PGM in awaruite provide evidence of PGE mobility during metamorphic and ... Report Kamchatka Koryak Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Lithosphere 2023 1 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Geochemistry & Geophysics Geology KAMCHATSKY MYS PENINSULA EASTERN KAMCHATKA GROUP MINERALS PGE MINERALIZATION OPHIOLITE COMPLEX SULFIDE MINERALS PLACER DEPOSITS CR-SPINEL ICP-MS LASER |
spellingShingle |
Geochemistry & Geophysics Geology KAMCHATSKY MYS PENINSULA EASTERN KAMCHATKA GROUP MINERALS PGE MINERALIZATION OPHIOLITE COMPLEX SULFIDE MINERALS PLACER DEPOSITS CR-SPINEL ICP-MS LASER Kutyrev, Anton Kamenetsky, Vadim S. Kontonikas-Charos, Alkiviadis Savelyev, Dmitry P. Yakich, Tamara Yu. Belousov, Ivan A. Sandimirova, Elena I. Moskaleva, Svetlana, V Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization |
topic_facet |
Geochemistry & Geophysics Geology KAMCHATSKY MYS PENINSULA EASTERN KAMCHATKA GROUP MINERALS PGE MINERALIZATION OPHIOLITE COMPLEX SULFIDE MINERALS PLACER DEPOSITS CR-SPINEL ICP-MS LASER |
description |
Natural Fe-Ni alloys are common in meteorites and, presumably, the Earth's core, where they host significant platinum-group elements (PGE). However, little is known on PGE concentrations in hydrothermal or metamorphic Fe-Ni alloys (i.e., awaruite Ni3Fe) from terrestrial rocks. In this work, we examine the geochemistry of awaruite and related minerals from several placer deposits sourced from the suprasubduction ophiolitic (Kamchatsky Mys, Karaginsky Island, and Mamet) and Ural-Alaskan (Galmoenan) complexes of Kamchatka and the Koryak Highlands (Far East Russia) in order to assess the abundance of PGE in awaruite and constrain their mobility under metamorphic and hydrothermal conditions. Studied awaruite from ophiolitic and Ural-Alaskan type complexes formed via desulfurization of pentlandite during serpentinization. Three groups of platinum-group minerals (PGMs) are associated with awaruite from Kamchatsky Mys: (1) Pt-Fe alloys such as ferronickelplatinum (Pt2FeNi) or unnamed Ni2FePt alloys; (2) Os-Ir-Ru alloys of various composition; (3) Pd-Sb minerals which form together with serpentine during hydrothermal alteration. Despite the abundance of PGM inclusions, no significant PGE concentrations were measured in awaruite from the Kamchatsky Mys, Karaginsky Island, or Mamet ophiolites. In contrast, pentlandite relicts in awaruite from placers related to the Galmoenan Ural-Alaskan type complex contain exceptionally high, previously unreported, Os (up to 540 ppm). Awaruite that forms on behalf of this pentlandite does not show any significant Os enrichment. Rare Galmoenan awaruite analyses yield up to 3 ppm Pd. The new data are not in complete accordance with previous studies that reported relatively high (up to first 10 ppm) PGE content in awaruite. We attribute this to low PGE concentration in precursor sulfides and preferential partitioning of PGE into discrete secondary PGM within awaruite. Nevertheless, abundant inclusions of secondary PGM in awaruite provide evidence of PGE mobility during metamorphic and ... |
format |
Report |
author |
Kutyrev, Anton Kamenetsky, Vadim S. Kontonikas-Charos, Alkiviadis Savelyev, Dmitry P. Yakich, Tamara Yu. Belousov, Ivan A. Sandimirova, Elena I. Moskaleva, Svetlana, V |
author_facet |
Kutyrev, Anton Kamenetsky, Vadim S. Kontonikas-Charos, Alkiviadis Savelyev, Dmitry P. Yakich, Tamara Yu. Belousov, Ivan A. Sandimirova, Elena I. Moskaleva, Svetlana, V |
author_sort |
Kutyrev, Anton |
title |
Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization |
title_short |
Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization |
title_full |
Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization |
title_fullStr |
Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization |
title_full_unstemmed |
Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization |
title_sort |
behavior of platinum-group elements during hydrous metamorphism: constraints from awaruite (ni3fe) mineralization |
publisher |
GEOSCIENCEWORLD |
publishDate |
2023 |
url |
http://ir.qdio.ac.cn/handle/337002/183825 http://ir.qdio.ac.cn/handle/337002/183826 https://doi.org/10.2113/2023/lithosphere_2023_126 |
genre |
Kamchatka Koryak |
genre_facet |
Kamchatka Koryak |
op_relation |
LITHOSPHERE http://ir.qdio.ac.cn/handle/337002/183825 http://ir.qdio.ac.cn/handle/337002/183826 doi:10.2113/2023/lithosphere_2023_126 |
op_doi |
https://doi.org/10.2113/2023/lithosphere_2023_126 |
container_title |
Lithosphere |
container_volume |
2023 |
container_issue |
1 |
_version_ |
1797586111155929088 |