Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization

doi:10.2113/2023/lithosphere_2023_126

	Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization
	Kutyrev, Anton 1; Kamenetsky, Vadim S.2,3; Kontonikas-Charos, Alkiviadis 4; Savelyev, Dmitry P.5; Yakich, Tamara Yu.6; Belousov, Ivan A.7; Sandimirova, Elena I.8; Moskaleva, Svetlana, V 9
	2023
发表期刊	LITHOSPHERE
ISSN	1941-8264
卷号	2023 期号:1 页码:16
通讯作者	Kutyrev, Anton(anton.v.kutyrev@gmail.com)
摘要	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 hydrothermal alteration of ultramafic rocks.
DOI	10.2113/2023/lithosphere_2023_126
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Higher Education of the Russian Federation[FSWW-2023-0010] ; Visiting Scientist Award by the Chinese Academy of Sciences
WOS研究方向	Geochemistry & Geophysics ; Geology
WOS类目	Geochemistry & Geophysics ; Geology
WOS记录号	WOS:001094957400001
出版者	GEOSCIENCEWORLD
WOS关键词	KAMCHATSKY MYS PENINSULA ; EASTERN KAMCHATKA ; GROUP MINERALS ; PGE MINERALIZATION ; OPHIOLITE COMPLEX ; SULFIDE MINERALS ; PLACER DEPOSITS ; CR-SPINEL ; ICP-MS ; LASER
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183826
专题	深海极端环境与生命过程研究中心
通讯作者	Kutyrev, Anton
作者单位	1.Univ Oregon, Dept Earth Sci, Eugene, OR 97403 USA 2.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 3.Inst Volcanol & Seismol FEB RAS, Lab Mineral, Petropavlovsk Kamchatski 683006, Russia 4.Queensland Univ Technol, Sch Earth & Atmospher Sci, Brisbane, Qld 4001, Australia 5.Inst Volcanol & Seismol FEB RAS, Lab Petrol & Geochem, Petropavlovsk Kamchatski 683006, Russia 6.Tomsk Polytech Univ, Tomsk, Russia 7.Univ Tasmania, Ctr Ore Deposit & Earth Sci CODES, Sch Nat Sci, Hobart, Tas 7001, Australia 8.Inst Volcanol & Seismol, Geothermal Lab, Petropavlovsk Kamchatksy 683006, Russia 9.Inst Volcanol & Seismol, Lab Volcanogen Ore Genesis, Petropavlovsk Kamchatski 683006, Russia
推荐引用方式 GB/T 7714	Kutyrev, Anton,Kamenetsky, Vadim S.,Kontonikas-Charos, Alkiviadis,et al. Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization[J]. LITHOSPHERE,2023,2023(1):16.
APA	Kutyrev, Anton.,Kamenetsky, Vadim S..,Kontonikas-Charos, Alkiviadis.,Savelyev, Dmitry P..,Yakich, Tamara Yu..,...&Moskaleva, Svetlana, V.(2023).Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization.LITHOSPHERE,2023(1),16.
MLA	Kutyrev, Anton,et al."Behavior of Platinum-Group Elements during Hydrous Metamorphism: Constraints from Awaruite (Ni3Fe) Mineralization".LITHOSPHERE 2023.1(2023):16.