Ulban Terrane (Zone) as Part of the Jurassic Accretionary Complex of the Sikhote-Alin Orogenic Belt.
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| Title: | Ulban Terrane (Zone) as Part of the Jurassic Accretionary Complex of the Sikhote-Alin Orogenic Belt. |
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| Authors: | Khanchuk, A. I.1,2 (AUTHOR) axanchuk@mail.ru, Kemkin, I. V.1 (AUTHOR), Kirillov, V. E.3 (AUTHOR) kirillov@itig.as.khb.ru, Ivanov, V. V.1 (AUTHOR), Kiryanov, M. F.4 (AUTHOR) falentich@inbox.ru, Trushin, S. I.5 (AUTHOR) Trushin@polymetal.ru |
| Source: | Russian Journal of Pacific Geology. Jun2024, Vol. 18 Issue 3, p233-247. 15p. |
| Subject Terms: | *Subduction, *Orogenic belts, *Mudstone, *Chert, *Subduction zones, *Basalt |
| Abstract: | The paper presents new data on the age of Triassic–Jurassic cherts replaced up section by siliceous mudstones, then by mudstones, which together with basalts form thin (up to hundreds of meters) plates and lenses that wedge out along strike at different levels of the multikilometer terrigenous section of the Ulban terrane (zone). These deposits in the Nimelen subzone (Albazino gold deposit area) formed in the Norian–Early Toarcian; host terrigenous deposits formed in the Pliensbachian–Bathonian. The age of cherts and siliceous–clayey rocks in the Mewachan subzone is Middle Triassic–Callovian, and that of host terrigenous rocks is Middle–Late Jurassic (including the Tithonian). Comparison of deposits of the Ulban terrane with well-studied deposits of the Samarka terrane similar in age and composition allows us to consider the Ulban terrane (zone) as part of the Jurassic accretionary complex of the Sikhote-Alin orogenic belt. There are also sufficient signs to consider that its structural features are consistent with the subduction model. This idea is based on the fact that Triassic–Jurassic cherts and siliceous–clayey rocks, which accumulated over about 45 Ma at a rate of about 1.8 m/Ma, are considered the sedimentary cover of the oceanic plate. At the same time, a gradual transition from cherts to mudstones is evidence of movement of the oceanic plate into the subduction zone. The occurrence of its fragments in the terrigenous section is the result of their detachment in the trench and under the overhanging slab. Tectonostratigraphic columns of the subzones of the Ulban terrane and a zonal scheme of the Jurassic accretionary wedge, including four structural-age levels, have been compiled. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 177648117 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Ulban Terrane (Zone) as Part of the Jurassic Accretionary Complex of the Sikhote-Alin Orogenic Belt. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Khanchuk%2C+A%2E+I%2E%22">Khanchuk, A. I.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> axanchuk@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Kemkin%2C+I%2E+V%2E%22">Kemkin, I. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kirillov%2C+V%2E+E%2E%22">Kirillov, V. E.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> kirillov@itig.as.khb.ru</i><br /><searchLink fieldCode="AR" term="%22Ivanov%2C+V%2E+V%2E%22">Ivanov, V. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kiryanov%2C+M%2E+F%2E%22">Kiryanov, M. F.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> falentich@inbox.ru</i><br /><searchLink fieldCode="AR" term="%22Trushin%2C+S%2E+I%2E%22">Trushin, S. I.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> Trushin@polymetal.ru</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Russian+Journal+of+Pacific+Geology%22">Russian Journal of Pacific Geology</searchLink>. Jun2024, Vol. 18 Issue 3, p233-247. 15p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Subduction%22">Subduction</searchLink><br />*<searchLink fieldCode="DE" term="%22Orogenic+belts%22">Orogenic belts</searchLink><br />*<searchLink fieldCode="DE" term="%22Mudstone%22">Mudstone</searchLink><br />*<searchLink fieldCode="DE" term="%22Chert%22">Chert</searchLink><br />*<searchLink fieldCode="DE" term="%22Subduction+zones%22">Subduction zones</searchLink><br />*<searchLink fieldCode="DE" term="%22Basalt%22">Basalt</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The paper presents new data on the age of Triassic–Jurassic cherts replaced up section by siliceous mudstones, then by mudstones, which together with basalts form thin (up to hundreds of meters) plates and lenses that wedge out along strike at different levels of the multikilometer terrigenous section of the Ulban terrane (zone). These deposits in the Nimelen subzone (Albazino gold deposit area) formed in the Norian–Early Toarcian; host terrigenous deposits formed in the Pliensbachian–Bathonian. The age of cherts and siliceous–clayey rocks in the Mewachan subzone is Middle Triassic–Callovian, and that of host terrigenous rocks is Middle–Late Jurassic (including the Tithonian). Comparison of deposits of the Ulban terrane with well-studied deposits of the Samarka terrane similar in age and composition allows us to consider the Ulban terrane (zone) as part of the Jurassic accretionary complex of the Sikhote-Alin orogenic belt. There are also sufficient signs to consider that its structural features are consistent with the subduction model. This idea is based on the fact that Triassic–Jurassic cherts and siliceous–clayey rocks, which accumulated over about 45 Ma at a rate of about 1.8 m/Ma, are considered the sedimentary cover of the oceanic plate. At the same time, a gradual transition from cherts to mudstones is evidence of movement of the oceanic plate into the subduction zone. The occurrence of its fragments in the terrigenous section is the result of their detachment in the trench and under the overhanging slab. Tectonostratigraphic columns of the subzones of the Ulban terrane and a zonal scheme of the Jurassic accretionary wedge, including four structural-age levels, have been compiled. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S1819714024700015 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 233 Subjects: – SubjectFull: Subduction Type: general – SubjectFull: Orogenic belts Type: general – SubjectFull: Mudstone Type: general – SubjectFull: Chert Type: general – SubjectFull: Subduction zones Type: general – SubjectFull: Basalt Type: general Titles: – TitleFull: Ulban Terrane (Zone) as Part of the Jurassic Accretionary Complex of the Sikhote-Alin Orogenic Belt. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Khanchuk, A. I. – PersonEntity: Name: NameFull: Kemkin, I. V. – PersonEntity: Name: NameFull: Kirillov, V. E. – PersonEntity: Name: NameFull: Ivanov, V. V. – PersonEntity: Name: NameFull: Kiryanov, M. F. – PersonEntity: Name: NameFull: Trushin, S. I. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 18197140 Numbering: – Type: volume Value: 18 – Type: issue Value: 3 Titles: – TitleFull: Russian Journal of Pacific Geology Type: main |
| ResultId | 1 |
