Geochemistry of rocks in the Anuy metamorphic dome, Sikhote-Alin: Composition of the protoliths and the possible nature of metamorphism.
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| Title: | Geochemistry of rocks in the Anuy metamorphic dome, Sikhote-Alin: Composition of the protoliths and the possible nature of metamorphism. |
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| Authors: | Kruk, N.1 kruk@igm.nsc.ru, Simanenko, V.1, Golozubov, V.2 golozubov@fegi.ru, Kovach, V.3 v.kovach@mail.ru, Vladimirov, V.1, Kasatkin, S.2 |
| Source: | Geochemistry International. Mar2014, Vol. 52 Issue 3, p229-246. 18p. |
| Subjects: | Geochemistry, Metamorphic rocks, Domes (Geology), Metamorphism (Geology), Sedimentary rocks |
| Abstract: | The paper presents geological, geochemical, and isotopic data on metamorphic rocks in the Anuy block (dome) in the Northern Sikhote-Alin and the surrounding sedimentary rocks of the Samarka accretionary prism. The geochemistry and isotopic composition of the amphibolite-facies metamorphic rocks (variably migmatized gneisses and crystalline schists) in the Anuy block and unmetamorphosed Jurassic-Cretaceous sediments surrounding the block are proved to be similar. All of them corresponded to the erosion products of the transitional-type crust (mature island arcs and active continental margins), have similar major- and trace-element compositions, and Nd model ages of 1.25-1.4 Ga. The geochemistry and isotopic parameters of metapelites in the Anuy block are principally different from those of analogous rocks in the Khanka Massif (the latter rocks are erosion products of the mature crust and have a Nd model age of 1.7-1.9 Ga). The metabasites, which are found as beds and lenses in gneisses and crystalline schists in the Anuy block and among sedimentary rocks surrounding the block, have a composition corresponding to oceanic basalts of the N- and E-MORB types. Based on the synthesis of geological, geochemical and isotopic data it was suggested that the Anuy block could be not a fragment of the basement of an ancient continent (as was believed previously) but rather a complex of the Early Cretaceous granite-metamorphic core of the Cordilleran type. [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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| Items | – Name: Title Label: Title Group: Ti Data: Geochemistry of rocks in the Anuy metamorphic dome, Sikhote-Alin: Composition of the protoliths and the possible nature of metamorphism. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kruk%2C+N%2E%22">Kruk, N.</searchLink><relatesTo>1</relatesTo><i> kruk@igm.nsc.ru</i><br /><searchLink fieldCode="AR" term="%22Simanenko%2C+V%2E%22">Simanenko, V.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Golozubov%2C+V%2E%22">Golozubov, V.</searchLink><relatesTo>2</relatesTo><i> golozubov@fegi.ru</i><br /><searchLink fieldCode="AR" term="%22Kovach%2C+V%2E%22">Kovach, V.</searchLink><relatesTo>3</relatesTo><i> v.kovach@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Vladimirov%2C+V%2E%22">Vladimirov, V.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kasatkin%2C+S%2E%22">Kasatkin, S.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geochemistry+International%22">Geochemistry International</searchLink>. Mar2014, Vol. 52 Issue 3, p229-246. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Geochemistry%22">Geochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Metamorphic+rocks%22">Metamorphic rocks</searchLink><br /><searchLink fieldCode="DE" term="%22Domes+%28Geology%29%22">Domes (Geology)</searchLink><br /><searchLink fieldCode="DE" term="%22Metamorphism+%28Geology%29%22">Metamorphism (Geology)</searchLink><br /><searchLink fieldCode="DE" term="%22Sedimentary+rocks%22">Sedimentary rocks</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The paper presents geological, geochemical, and isotopic data on metamorphic rocks in the Anuy block (dome) in the Northern Sikhote-Alin and the surrounding sedimentary rocks of the Samarka accretionary prism. The geochemistry and isotopic composition of the amphibolite-facies metamorphic rocks (variably migmatized gneisses and crystalline schists) in the Anuy block and unmetamorphosed Jurassic-Cretaceous sediments surrounding the block are proved to be similar. All of them corresponded to the erosion products of the transitional-type crust (mature island arcs and active continental margins), have similar major- and trace-element compositions, and Nd model ages of 1.25-1.4 Ga. The geochemistry and isotopic parameters of metapelites in the Anuy block are principally different from those of analogous rocks in the Khanka Massif (the latter rocks are erosion products of the mature crust and have a Nd model age of 1.7-1.9 Ga). The metabasites, which are found as beds and lenses in gneisses and crystalline schists in the Anuy block and among sedimentary rocks surrounding the block, have a composition corresponding to oceanic basalts of the N- and E-MORB types. Based on the synthesis of geological, geochemical and isotopic data it was suggested that the Anuy block could be not a fragment of the basement of an ancient continent (as was believed previously) but rather a complex of the Early Cretaceous granite-metamorphic core of the Cordilleran type. [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.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S0016702914010030 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 229 Subjects: – SubjectFull: Geochemistry Type: general – SubjectFull: Metamorphic rocks Type: general – SubjectFull: Domes (Geology) Type: general – SubjectFull: Metamorphism (Geology) Type: general – SubjectFull: Sedimentary rocks Type: general Titles: – TitleFull: Geochemistry of rocks in the Anuy metamorphic dome, Sikhote-Alin: Composition of the protoliths and the possible nature of metamorphism. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kruk, N. – PersonEntity: Name: NameFull: Simanenko, V. – PersonEntity: Name: NameFull: Golozubov, V. – PersonEntity: Name: NameFull: Kovach, V. – PersonEntity: Name: NameFull: Vladimirov, V. – PersonEntity: Name: NameFull: Kasatkin, S. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 00167029 Numbering: – Type: volume Value: 52 – Type: issue Value: 3 Titles: – TitleFull: Geochemistry International Type: main |
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