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Tajik Basin and Southwestern Tian Shan, Northwestern India-Asia Collision Zone: 3. Preorogenic to Synorogenic Retro-foreland Basin Evolution in the Eastern Tajik Depression and Linkage to the Pamir Hinterland

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dc.contributor.author Dedow R.
dc.contributor.author Franz M.
dc.contributor.author Szulc A.
dc.contributor.author Schneider J.W.
dc.contributor.author Brückner J.
dc.contributor.author Ratschbacher L.
dc.contributor.author Gągała Ł.
dc.contributor.author Ringenbach J.C.
dc.contributor.author Rajabov N.
dc.contributor.author Gadoev M.
dc.contributor.author Oimahmadov I.
dc.date.accessioned 2021-02-25T20:34:51Z
dc.date.available 2021-02-25T20:34:51Z
dc.date.issued 2020
dc.identifier.issn 0278-7407
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/161832
dc.description.abstract ©2020. American Geophysical Union. All Rights Reserved. The Tajik basin archives the orogenic evolution of the Pamir hinterland. Stratigraphic-sedimentologic observations from Cretaceous-Pliocene strata along its eastern margin describe the depositional environment and basin-formation stages in reaction to hinterland exhumation and basin inversion. During the Late Cretaceous-Eocene (preorogenic stage: ~100–34 Ma), a shallow-marine to terrestrial basin extended throughout Central Asia. An alluvial plain with influx of conglomerate bodies (Baljuvon Formation) indicates a first pulse of hinterland erosion and foreland-basin formation in the late Oligocene-early Miocene (synorogenic stage Ia: ~34–23 Ma). Further hinterland exhumation deposited massive alluvial conglomerates (Khingou Formation) in the early-middle Miocene (synorogenic stage Ib: ~23–15 Ma). Westward thickening growth strata suggest transformation of the Tajik basin into the Tajik fold-thrust belt in the middle-late Miocene (synorogenic stage IIa: ~15–5 Ma). Increased water supply led to the formation of fluvial mega-fans (Tavildara Formation). Latest Miocene-Pliocene shortening constructed basin morphology that blocked sediment bypass into the central basin from the east (Karanak Formation), triggering drainage-system reorganization from transverse to longitudinal sediment transport (synorogenic stage IIb: < ~5 Ma). Accelerated shortening (~27–20 Ma) and foreland-directed collapse (~23–12 Ma) of Pamir-plateau crust loaded the foreland and induced synorogenic stages Ia and Ib. Coupling of Indian and Asian cratonic lithospheres and onset of northward and westward delamination/rollback of Asian lithosphere (i.e., lithosphere of the Tajik basin) beneath the Pamir at ~12–11 Ma transformed the Tajik basin into the Tajik fold-thrust belt (synorogenic stage IIa). The timing of the sedimentologically derived basin reconfiguration matches the thermochronologically derived onset of Tajik-basin inversion at ~12 Ma.
dc.relation.ispartofseries Tectonics
dc.subject deep-lithosphere trigger
dc.subject growth strata
dc.subject Pamir-Tibet formation
dc.subject provenance
dc.subject Tajik retro-foreland basin
dc.title Tajik Basin and Southwestern Tian Shan, Northwestern India-Asia Collision Zone: 3. Preorogenic to Synorogenic Retro-foreland Basin Evolution in the Eastern Tajik Depression and Linkage to the Pamir Hinterland
dc.type Article
dc.relation.ispartofseries-issue 5
dc.relation.ispartofseries-volume 39
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS02787407-2020-39-5-SID85085350894


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  • Публикации сотрудников КФУ Scopus [22633]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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