Zircon Trace‐Element Compositions in Cenozoic Granitoids in Japan: Revised Discrimination Diagrams for Zircons in I‐Type, S‐Type, and A‐Type Granites.
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| Title: | Zircon Trace‐Element Compositions in Cenozoic Granitoids in Japan: Revised Discrimination Diagrams for Zircons in I‐Type, S‐Type, and A‐Type Granites. |
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| Authors: | Sawaki, Yusuke1 (AUTHOR) y‐sawaki@g.ecc.u‐tokyo.ac.jp, Asanuma, Hisashi2 (AUTHOR), Sakata, Shuhei3 (AUTHOR), Abe, Mariko4 (AUTHOR), Ueda, Hisahiro5 (AUTHOR), Fujisaki, Wataru6,7 (AUTHOR), Ohno, Takeshi5 (AUTHOR) |
| Source: | Island Arc. Jan2024, Vol. 33 Issue 1, p1-19. 19p. |
| Subject Terms: | Zircon, Databases, Hadean, Research personnel, Ilmenite |
| Abstract: | Owing to high resistance to alteration, detrital zircons retain information about their formation ages and parental magmas for a long period of time. Many geochemical researchers have proposed various indicators for zircon to constrain tectonic settings and to identify source rock. Because most detrital zircons analyzed by geochronologic studies are derived primarily from granitoids, we focus on the classification of zircon within granitoids. In the style of alphabetical classification scheme (Igneous, I; Sedimentary, S; and Alkaline, A types), some discrimination diagrams have been proposed. To improve the database and enhance discriminating studies, we examined trace‐element compositions of zircons extracted from some Cenozoic granitoids exposed in the Japan Islands. The zircons showed systematic differences in Nb, Ta, Ce, and P contents. Zircons in Oceanic Arc I‐type granite are poor in Nb and Ta, and these signatures clearly reflect those elements in their parental bodies. Despite their low abundance at the whole‐rock level, zircons in Oceanic Arc I‐type granite are characterized by high Ce content. This is attributable to the relatively oxidizing conditions of Oceanic Arc I‐type magma. Zircons in S‐type granite are characterized by high P and low Ce contents. The former can be explained by high apatite solubility in Al‐rich magma, whereas the reducing environment of S‐type magma is accountable for the latter. The zircon crystallized at the later stage during S‐type granite solidification is slightly depleted in Nb and Ta. This is attributable to the depletion of these elements in the magma by Ti‐bearing minerals such as ilmenite prior to zircon crystallization. In analogy with whole‐rock composition, zircons in transitional I‐A‐type granite have intermediate composition between I‐type and A‐type zircons. On the basis of the updated database, we demonstrated that the Nb/P–Ce/P or Ta/P–Ce/P crossplots are the most useful for discriminating zircons in Oceanic Arc I‐type, I‐type, S‐type, and A‐type granites. [ABSTRACT FROM AUTHOR] |
| Copyright of Island Arc is the property of Wiley-Blackwell 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.) | |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 181662884 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Zircon Trace‐Element Compositions in Cenozoic Granitoids in Japan: Revised Discrimination Diagrams for Zircons in I‐Type, S‐Type, and A‐Type Granites. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sawaki%2C+Yusuke%22">Sawaki, Yusuke</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> y‐sawaki@g.ecc.u‐tokyo.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Asanuma%2C+Hisashi%22">Asanuma, Hisashi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sakata%2C+Shuhei%22">Sakata, Shuhei</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abe%2C+Mariko%22">Abe, Mariko</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ueda%2C+Hisahiro%22">Ueda, Hisahiro</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fujisaki%2C+Wataru%22">Fujisaki, Wataru</searchLink><relatesTo>6,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ohno%2C+Takeshi%22">Ohno, Takeshi</searchLink><relatesTo>5</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Island+Arc%22">Island Arc</searchLink>. Jan2024, Vol. 33 Issue 1, p1-19. 19p. – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Zircon%22">Zircon</searchLink><br /><searchLink fieldCode="DE" term="%22Databases%22">Databases</searchLink><br /><searchLink fieldCode="DE" term="%22Hadean%22">Hadean</searchLink><br /><searchLink fieldCode="DE" term="%22Research+personnel%22">Research personnel</searchLink><br /><searchLink fieldCode="DE" term="%22Ilmenite%22">Ilmenite</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Owing to high resistance to alteration, detrital zircons retain information about their formation ages and parental magmas for a long period of time. Many geochemical researchers have proposed various indicators for zircon to constrain tectonic settings and to identify source rock. Because most detrital zircons analyzed by geochronologic studies are derived primarily from granitoids, we focus on the classification of zircon within granitoids. In the style of alphabetical classification scheme (Igneous, I; Sedimentary, S; and Alkaline, A types), some discrimination diagrams have been proposed. To improve the database and enhance discriminating studies, we examined trace‐element compositions of zircons extracted from some Cenozoic granitoids exposed in the Japan Islands. The zircons showed systematic differences in Nb, Ta, Ce, and P contents. Zircons in Oceanic Arc I‐type granite are poor in Nb and Ta, and these signatures clearly reflect those elements in their parental bodies. Despite their low abundance at the whole‐rock level, zircons in Oceanic Arc I‐type granite are characterized by high Ce content. This is attributable to the relatively oxidizing conditions of Oceanic Arc I‐type magma. Zircons in S‐type granite are characterized by high P and low Ce contents. The former can be explained by high apatite solubility in Al‐rich magma, whereas the reducing environment of S‐type magma is accountable for the latter. The zircon crystallized at the later stage during S‐type granite solidification is slightly depleted in Nb and Ta. This is attributable to the depletion of these elements in the magma by Ti‐bearing minerals such as ilmenite prior to zircon crystallization. In analogy with whole‐rock composition, zircons in transitional I‐A‐type granite have intermediate composition between I‐type and A‐type zircons. On the basis of the updated database, we demonstrated that the Nb/P–Ce/P or Ta/P–Ce/P crossplots are the most useful for discriminating zircons in Oceanic Arc I‐type, I‐type, S‐type, and A‐type granites. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Island Arc is the property of Wiley-Blackwell 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: 10.1111/iar.12539 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 1 Subjects: – SubjectFull: Zircon Type: general – SubjectFull: Databases Type: general – SubjectFull: Hadean Type: general – SubjectFull: Research personnel Type: general – SubjectFull: Ilmenite Type: general Titles: – TitleFull: Zircon Trace‐Element Compositions in Cenozoic Granitoids in Japan: Revised Discrimination Diagrams for Zircons in I‐Type, S‐Type, and A‐Type Granites. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sawaki, Yusuke – PersonEntity: Name: NameFull: Asanuma, Hisashi – PersonEntity: Name: NameFull: Sakata, Shuhei – PersonEntity: Name: NameFull: Abe, Mariko – PersonEntity: Name: NameFull: Ueda, Hisahiro – PersonEntity: Name: NameFull: Fujisaki, Wataru – PersonEntity: Name: NameFull: Ohno, Takeshi IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 10384871 Numbering: – Type: volume Value: 33 – Type: issue Value: 1 Titles: – TitleFull: Island Arc Type: main |
| ResultId | 1 |
