LATE ARCHEAN GRANITOIDS OF THE DAMBUKINSKIǐ BLOCK OF THE DZHUGDZHUR-STANOVOY FOLD BELT: FORMATION AND TRANSFORMATION OF THE CONTINENTAL CRUST IN THE EARLY PRECAMBRIAN
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dc.contributor.author | Larin A.M. | |
dc.contributor.author | Sal'nikova E.B. | |
dc.contributor.author | Kotov A.B. | |
dc.contributor.author | Glebovitsky V.A. | |
dc.contributor.author | Kovach V.P. | |
dc.contributor.author | Berezhnaya N.G. | |
dc.contributor.author | Yakovleva S.Z. | |
dc.contributor.author | Tolkachev M.D. | |
dc.date.accessioned | 2022-11-04T07:50:34Z | |
dc.date.available | 2022-11-04T07:50:34Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=13468582 | |
dc.identifier.citation | Petrology, 2004, 12, 3, 211-226 | |
dc.identifier.issn | 0869-5911 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/39403 | |
dc.description.abstract | This paper presents new data on the age and composition of granitoids from the Charnokitovyǐ and Drevnestanovoy complexes of the Dambukinskiǐ block in the eastern Dzhugdzhur-Stanovoy fold belt. Based on the results of U-Pb zircon geochronology, including single grain dating, it was shown that these granitoids are 2833±15 and 2828±34 Ma old, respectively, and experienced structural and metamorphic transformations corresponding to at least two events of high-temperature regional metamorphism of Late Archean (2647 ± 3 Ma) and Early Proterozoic (1884 ± 9 Ma) ages. The former was probably related to the accretion of the small terranes that now build up the ancient granulite basement of the Dzhugdzhur-Stanovoy fold belt and their attachment to the Olekma-Aldan continental microplate. The second metamorphic event was probably caused by the collision of the Dzhugdzhur-Stanovoy microplate and the Siberian craton, when the Early Proterozoic ocean basin between them closed. Our geochronological, isotopic (Sm-Nd and Pb-Pb), and geochemical results suggest that the generation of the parental melts of the Charnokitovyǐ and Drevnestanovoy granitoids reflected the occurrence of crust-forming processes 2.9-2.8 Ga ago. They were younger than the Late Archean crust-forming events that have been recognized up to now in the Aldan shield. | |
dc.subject | Dambukinski Block | |
dc.subject | Dzhugdzhur Stanovoy Fold Belt | |
dc.subject | granitoids | |
dc.subject | Aldan shield | |
dc.title | LATE ARCHEAN GRANITOIDS OF THE DAMBUKINSKIǐ BLOCK OF THE DZHUGDZHUR-STANOVOY FOLD BELT: FORMATION AND TRANSFORMATION OF THE CONTINENTAL CRUST IN THE EARLY PRECAMBRIAN | |
dc.type | Статья | |
dc.subject.age | Precambrian::Archean | |
dc.subject.age | Докембрий::Архей | ru |
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