Experimentally determined nickel partitioning between mantle minerals and hydrous mafic melts at 1050–1250 °C: Evaluation of pyroxenite contribution to arc magma generation.
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| Title: | Experimentally determined nickel partitioning between mantle minerals and hydrous mafic melts at 1050–1250 °C: Evaluation of pyroxenite contribution to arc magma generation. |
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| Authors: | Sun, Zhongxing1,2 (AUTHOR), Ruan, Mengfei3 (AUTHOR), Xiong, Xiaolin1,2 (AUTHOR), Wang, Yu2 (AUTHOR), Gao, Mingdi1,2 (AUTHOR) gaomingdi@gig.ac.cn |
| Source: | Geochimica et Cosmochimica Acta. Jun2026, Vol. 423, p129-150. 22p. |
| Subjects: | Pyroxenite, Partition coefficient (Chemistry), Petrology, Magmas, Rock-forming minerals, Olivine |
| Abstract: | High-Ni olivine phenocrysts in arc magmas are commonly used to infer the contribution of pyroxenite components during sub-arc mantle melting. However, accurate mantle mineral-melt Ni partition coefficients (D Ni) under conditions relevant to sub-arc mantle melting and early differentiation of arc magmas remain poorly constrained, casting doubt on this interpretation. One principal challenge for determining reliable mineral-melt D Ni by experiments is mitigating the severe Ni loss to experimental capsules. Using the Ni-bearing capsule technique, we here determined D Ni between mantle minerals (olivine, orthopyroxene, clinopyroxene and spinel) and hydrous mafic melt (∼5–12 wt% MgO, ∼1–9 wt% H 2 O) at 1–1.5 GPa and 1050–1250 ℃, corresponding to conditions of arc magma generation and early differentiation. The experimental results show that D Ni values for olivine, orthopyroxene and clinopyroxene increase from 11.4 to 37.6, 3.5 to 11.5 and 3.5 to 6.4, respectively, with decreasing melt MgO content and temperature. These data, combined with screened literature data with limited Ni loss, are used to establish empirical expressions of mineral-melt D Ni as functions of melt MgO content and temperature. These expressions were applied to model Ni contents in melts derived from peridotite and pyroxenite sources, as well as Ni contents in olivine crystallized from these melts. The modeling results show that olivine crystallized from hydrous arc peridotite-derived melts exhibits lower Ni contents than the high-Ni olivine phenocrysts observed in some arc magmas. In contrast, olivine crystallized from pyroxenite-derived melts can reproduce the elevated Ni signatures in these olivine phenocrysts. Our results demonstrate that the pyroxenite contribution to generation of arc magmas might be more widespread than previous expected. [ABSTRACT FROM AUTHOR] |
| Copyright of Geochimica et Cosmochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 194552848 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Experimentally determined nickel partitioning between mantle minerals and hydrous mafic melts at 1050–1250 °C: Evaluation of pyroxenite contribution to arc magma generation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sun%2C+Zhongxing%22">Sun, Zhongxing</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ruan%2C+Mengfei%22">Ruan, Mengfei</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiong%2C+Xiaolin%22">Xiong, Xiaolin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yu%22">Wang, Yu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gao%2C+Mingdi%22">Gao, Mingdi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> gaomingdi@gig.ac.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geochimica+et+Cosmochimica+Acta%22">Geochimica et Cosmochimica Acta</searchLink>. Jun2026, Vol. 423, p129-150. 22p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Pyroxenite%22">Pyroxenite</searchLink><br /><searchLink fieldCode="DE" term="%22Partition+coefficient+%28Chemistry%29%22">Partition coefficient (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Petrology%22">Petrology</searchLink><br /><searchLink fieldCode="DE" term="%22Magmas%22">Magmas</searchLink><br /><searchLink fieldCode="DE" term="%22Rock-forming+minerals%22">Rock-forming minerals</searchLink><br /><searchLink fieldCode="DE" term="%22Olivine%22">Olivine</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: High-Ni olivine phenocrysts in arc magmas are commonly used to infer the contribution of pyroxenite components during sub-arc mantle melting. However, accurate mantle mineral-melt Ni partition coefficients (D Ni) under conditions relevant to sub-arc mantle melting and early differentiation of arc magmas remain poorly constrained, casting doubt on this interpretation. One principal challenge for determining reliable mineral-melt D Ni by experiments is mitigating the severe Ni loss to experimental capsules. Using the Ni-bearing capsule technique, we here determined D Ni between mantle minerals (olivine, orthopyroxene, clinopyroxene and spinel) and hydrous mafic melt (∼5–12 wt% MgO, ∼1–9 wt% H 2 O) at 1–1.5 GPa and 1050–1250 ℃, corresponding to conditions of arc magma generation and early differentiation. The experimental results show that D Ni values for olivine, orthopyroxene and clinopyroxene increase from 11.4 to 37.6, 3.5 to 11.5 and 3.5 to 6.4, respectively, with decreasing melt MgO content and temperature. These data, combined with screened literature data with limited Ni loss, are used to establish empirical expressions of mineral-melt D Ni as functions of melt MgO content and temperature. These expressions were applied to model Ni contents in melts derived from peridotite and pyroxenite sources, as well as Ni contents in olivine crystallized from these melts. The modeling results show that olivine crystallized from hydrous arc peridotite-derived melts exhibits lower Ni contents than the high-Ni olivine phenocrysts observed in some arc magmas. In contrast, olivine crystallized from pyroxenite-derived melts can reproduce the elevated Ni signatures in these olivine phenocrysts. Our results demonstrate that the pyroxenite contribution to generation of arc magmas might be more widespread than previous expected. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Geochimica et Cosmochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.gca.2026.05.004 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 22 StartPage: 129 Subjects: – SubjectFull: Pyroxenite Type: general – SubjectFull: Partition coefficient (Chemistry) Type: general – SubjectFull: Petrology Type: general – SubjectFull: Magmas Type: general – SubjectFull: Rock-forming minerals Type: general – SubjectFull: Olivine Type: general Titles: – TitleFull: Experimentally determined nickel partitioning between mantle minerals and hydrous mafic melts at 1050–1250 °C: Evaluation of pyroxenite contribution to arc magma generation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sun, Zhongxing – PersonEntity: Name: NameFull: Ruan, Mengfei – PersonEntity: Name: NameFull: Xiong, Xiaolin – PersonEntity: Name: NameFull: Wang, Yu – PersonEntity: Name: NameFull: Gao, Mingdi IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00167037 Numbering: – Type: volume Value: 423 Titles: – TitleFull: Geochimica et Cosmochimica Acta Type: main |
| ResultId | 1 |
