Role of Pyroxenite Mantle in the Formation of the Mesozoic Karoo Plume Melts: Evidence from the Western Queen Maud Land, East Antarctica.
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| Title: | Role of Pyroxenite Mantle in the Formation of the Mesozoic Karoo Plume Melts: Evidence from the Western Queen Maud Land, East Antarctica. |
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| Authors: | Sushchevskaya, N. M.1 (AUTHOR) nadyas@geokhi.ru, Sobolev, A. V.1,2 (AUTHOR), Leitchenkov, G. L.3,4 (AUTHOR) german_l@mail.ru, Batanova, V. G.1,2 (AUTHOR), Belyatsky, B. V.5 (AUTHOR) bbelyatsky@mail.ru, Zhilkina, A. V.1 (AUTHOR) |
| Source: | Geochemistry International. Apr2021, Vol. 59 Issue 4, p357-376. 20p. |
| Subjects: | Pyroxenite, Mesozoic Era, Igneous provinces, Magmas, Melting, Rare earth metals, Ytterbium |
| Geographic Terms: | Antarctica |
| Abstract: | Petrological and geochemical study of basalts and dolerites in East Antarctica, the formation of which is explained by the Karoo plume impact on the Queen Maud Land, revealed the presence of high-magnesium magmas, Fe-rich and depleted in incompatible elements, among the geochemically diverse magmas. Such high-Mg ferropicrites are scarce in other plume-related igneous provinces and their genesis is related to melting of a peculiar pyroxenite mantle source. These rocks were found only in the Ahlmannryggen and Vestfjella massifs in Antarctica and in the Letabo province in South Africa, correspond to the central part of the plume and likely the earliest eruptions. The studied dolerites are close to the parental melts. They have a relatively smoothed lithophile element pattern (from Th to Er), the lowered content of most compatible elements (Y, Yb, Lu), as well as the low 206Pb/204Pb = 17.33–17.37 and moderately radiogenic neodymium composition with 143Nd/144Nd from 0.51249 to 0.51259, which indicate a relatively old age of the pyroxenite component. All high-Ti basalts related to the Karoo–Maud plume point to the presence of this component in their compositions, but its proportion could significantly vary. [ABSTRACT FROM AUTHOR] |
| Copyright of Geochemistry International is the property of Springer Nature 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 |
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| Header | DbId: egs DbLabel: Engineering Source An: 149848093 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Role of Pyroxenite Mantle in the Formation of the Mesozoic Karoo Plume Melts: Evidence from the Western Queen Maud Land, East Antarctica. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sushchevskaya%2C+N%2E+M%2E%22">Sushchevskaya, N. M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nadyas@geokhi.ru</i><br /><searchLink fieldCode="AR" term="%22Sobolev%2C+A%2E+V%2E%22">Sobolev, A. V.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Leitchenkov%2C+G%2E+L%2E%22">Leitchenkov, G. L.</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<i> german_l@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Batanova%2C+V%2E+G%2E%22">Batanova, V. G.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Belyatsky%2C+B%2E+V%2E%22">Belyatsky, B. V.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> bbelyatsky@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Zhilkina%2C+A%2E+V%2E%22">Zhilkina, A. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geochemistry+International%22">Geochemistry International</searchLink>. Apr2021, Vol. 59 Issue 4, p357-376. 20p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Pyroxenite%22">Pyroxenite</searchLink><br /><searchLink fieldCode="DE" term="%22Mesozoic+Era%22">Mesozoic Era</searchLink><br /><searchLink fieldCode="DE" term="%22Igneous+provinces%22">Igneous provinces</searchLink><br /><searchLink fieldCode="DE" term="%22Magmas%22">Magmas</searchLink><br /><searchLink fieldCode="DE" term="%22Melting%22">Melting</searchLink><br /><searchLink fieldCode="DE" term="%22Rare+earth+metals%22">Rare earth metals</searchLink><br /><searchLink fieldCode="DE" term="%22Ytterbium%22">Ytterbium</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Antarctica%22">Antarctica</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Petrological and geochemical study of basalts and dolerites in East Antarctica, the formation of which is explained by the Karoo plume impact on the Queen Maud Land, revealed the presence of high-magnesium magmas, Fe-rich and depleted in incompatible elements, among the geochemically diverse magmas. Such high-Mg ferropicrites are scarce in other plume-related igneous provinces and their genesis is related to melting of a peculiar pyroxenite mantle source. These rocks were found only in the Ahlmannryggen and Vestfjella massifs in Antarctica and in the Letabo province in South Africa, correspond to the central part of the plume and likely the earliest eruptions. The studied dolerites are close to the parental melts. They have a relatively smoothed lithophile element pattern (from Th to Er), the lowered content of most compatible elements (Y, Yb, Lu), as well as the low 206Pb/204Pb = 17.33–17.37 and moderately radiogenic neodymium composition with 143Nd/144Nd from 0.51249 to 0.51259, which indicate a relatively old age of the pyroxenite component. All high-Ti basalts related to the Karoo–Maud plume point to the presence of this component in their compositions, but its proportion could significantly vary. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Geochemistry International is the property of Springer Nature 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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=149848093 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S001670292104008X Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 357 Subjects: – SubjectFull: Pyroxenite Type: general – SubjectFull: Mesozoic Era Type: general – SubjectFull: Igneous provinces Type: general – SubjectFull: Magmas Type: general – SubjectFull: Melting Type: general – SubjectFull: Rare earth metals Type: general – SubjectFull: Ytterbium Type: general – SubjectFull: Antarctica Type: general Titles: – TitleFull: Role of Pyroxenite Mantle in the Formation of the Mesozoic Karoo Plume Melts: Evidence from the Western Queen Maud Land, East Antarctica. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sushchevskaya, N. M. – PersonEntity: Name: NameFull: Sobolev, A. V. – PersonEntity: Name: NameFull: Leitchenkov, G. L. – PersonEntity: Name: NameFull: Batanova, V. G. – PersonEntity: Name: NameFull: Belyatsky, B. V. – PersonEntity: Name: NameFull: Zhilkina, A. V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2021 Type: published Y: 2021 Identifiers: – Type: issn-print Value: 00167029 Numbering: – Type: volume Value: 59 – Type: issue Value: 4 Titles: – TitleFull: Geochemistry International Type: main |
| ResultId | 1 |
