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Tectonic Evolution of Taimyr in the Late Paleozoic to Mesozoic from Provenance and Thermochronological Evidence
Stockholm University, Faculty of Science, Department of Geological Sciences.ORCID iD: 0000-0003-1009-2255
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The Taimyr Peninsula is a key element in the circum-Arctic region and represents thenorthern margin of the Siberian Craton. The Taimyr Peninsula is a late Paleozoic fold andthrust belt and preserves late Paleozoic through Mesozoic siliciclastic sedimentarysuccessions and providing an ideal location to investigate the Paleozoic to Mesozoictectonic evolution associated with the Uralian orogeny, the Siberian Trap magmatism andopening of Amerasia Basin within a circum-Arctic framework. Multiple methods areadopted, including petrography, heavy mineral analysis and detrital zircon U-Pbgeochronology for provenance investigation, apatite fission track dating for revealingthermal history and balanced cross section for understanding the deformation style ofTaimyr.The results of this thesis indicate that the Late Carboniferous to Permian sediments ofsouthern Taimyr were deposited in a pro-foreland basin of the Uralian orogen during theUralian orogeny. In the Triassic, the siliciclastic deposits still show a strong Uraliansignature but the initiation of Siberian Trap-related input begins to be significant. Erosionof the Uralian orogen has reached a deep metamorphic level. By Late Jurassic andCretaceous time, the deposition setting of southern Taimyr is an intracratonic basin.Erosion and input from Uralian sources waned while greater input from SiberianTrap-related rocks of the Taimyr region dominated. The Taimyr Peninsula underwent atleast three cooling and uplifting episodes: 280 Ma, 250 Ma and 220 Ma, corresponding tothe Uralian orogeny, the Siberian Traps and the late Triassic transpression.

Place, publisher, year, edition, pages
Stockholm: Department of Geological Sciences , 2015. , 28 p.
Series
Meddelanden från Stockholms universitets institution för geologiska vetenskaper, 359
Keyword [en]
Taimyr, sandstones, provenance, heavy mineral analysis, detrital zircon, apatite fission track, tectonic setting, uplift
National Category
Geology
Research subject
Geology
Identifiers
URN: urn:nbn:se:su:diva-119046ISBN: 978-91-7649-212-3 (print)OAI: oai:DiVA.org:su-119046DiVA: diva2:843143
Public defence
2015-09-16, De Geersalen, Geovetenskapens hus, Svante Arrhenius väg 14, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 1: Manuscript. Paper 2: In press. Paper 3: Manuscript. Paper 4: Manuscript.

Available from: 2015-08-25 Created: 2015-07-27 Last updated: 2015-09-01Bibliographically approved
List of papers
1. Provenance of Late Paleozoic-Mesozoic sandstones, Taimyr Peninsula, Arctic
Open this publication in new window or tab >>Provenance of Late Paleozoic-Mesozoic sandstones, Taimyr Peninsula, Arctic
(English)Manuscript (preprint) (Other academic)
Abstract [en]

The sedimentary and provenance characteristics of seven Permo-Carboniferous and two early Cretaceous samples from the Taimyr Peninsula provide information about the latest evolution of Uralian Orogeny. The Permo-Carboniferous samples have a mixed provenance of recycled and first cycle sediment, sourced from metamorphic and igneous terranes. U-Pb detrital zircon ages represent a mixture of Precambrian-Paleozoic grains with euhedral, penecontemporaneous late Carboniferous and Permian grains consistent with derivation from the Uralian and Timanian orogens, plus additional Caledonian material presumably derived from Baltica. There are distinct differences between the late Permian sample and the other Carboniferous and early Permian samples, interpreted to reflect the final collisional stage of Uralian Orogeny. Early Cretaceous sediments deposited when the Amerasian Basin opened preserve a mixed provenance of metamorphic and igneous source material of mainly first cycle detritus, as well as an unstable heavy mineral assemblage dominated by staurolite, suggesting local derivation. Detrital zircon ages fall almost exclusively into one late Permian-early Triassic cluster, indicating no relationship with the Cretaceous Verkhoyansk fold belt.

Keyword
provenance, heavy minerals, detrital zircons, Uralian orogen
National Category
Geology
Research subject
Geology
Identifiers
urn:nbn:se:su:diva-89450 (URN)
Funder
Swedish Research Council
Available from: 2013-04-25 Created: 2013-04-25 Last updated: 2015-07-27
2. Reconstruction of tectonic events on the northern Eurasia margin of the Arctic, from U-Pb detrital zircon provenance investigations of late Paleozoic to Mesozoic sandstones in southern Taimyr Peninsula
Open this publication in new window or tab >>Reconstruction of tectonic events on the northern Eurasia margin of the Arctic, from U-Pb detrital zircon provenance investigations of late Paleozoic to Mesozoic sandstones in southern Taimyr Peninsula
2016 (English)In: Geological Society of America Bulletin, ISSN 0016-7606, E-ISSN 1943-2674, Vol. 128, no 1-2, 29-46 p.Article in journal (Refereed) Published
Abstract [en]

The Taimyr fold-and-thrust belt records late Paleozoic compression, presumably related to Uralian orogenesis, overprinted by Mesozoic dextral strike-slip faulting. U-Pb detrital zircon analyses of 38 sandstones from southern Taimyr were conducted using laser ablation-inductively coupled plasma-mass spectrometry to investigate late Paleo-zoic to Mesozoic sediment provenance and the tectonic evolution of Taimyr within a regional framework. The Pennsylvanian to Permian sandstones contain detrital zircon populations of 370-260 Ma, which are consistent with derivation from the late Paleozoic Uralian orogen in northern Taimyr and/or the polar Urals. Late Neoproterozoic through Silurian ages (688-420 Ma), most consistent with derivation from Timanian and Caledonian age sources, suggest an ultimate Baltica source. Southern Taimyr represents the proforeland basin of the bivergent Uralian orogen in the late Paleozoic. Triassic sedimentary rocks contain detrital zircon populations of Carboniferous-Permian (355-260 Ma), late Neoproterozoic to Early Devonian (650-410 Ma), and minor Neoproterozoic (1000-700 Ma) ages, which suggest a similar provenance as the Carboniferous to Permian strata. The addition of a Permian-Triassic (260-220 Ma) zircon population indicates derivation of detritus from Siberian Trap-related magmatism. Jurassic samples have a dominant age peak at 255 Ma and a distinct reduction in Carboniferous-Permian and late Neoproterozoic to Early Devonian input, suggesting that erosion and contributions from Uralian sources ceased while greater input from Siberian Trap-related rocks of Taimyr dominated. Comparison of these results to the published literature demonstrates that detritus from the Uralian orogen was deposited in Taimyr, Novaya Zemlya, and the New Siberian Islands in the Permian, but not in the Lisburne Hills or Wrangel Island. In the Triassic, Taimyr, Chukotka, Wrangel Island, the Kular-Dome in the northern Verkhoyansk of Siberia, Lisburne Hills, Franz Josef Land, and Svalbard shared sources from Taimyr, the Siberian Traps, and the polar Urals, indicating that there were no geographic barriers among these locations prior to opening of the Amerasia Basin. Detritus from the Uralian orogen in Taimyr was shed northward into the retroforeland basin and was then transported farther 20-30 m. y. after Uralian orogenesis. The widespread distribution of material eroded from Taimyr and the polar Urals during the Triassic is likely due to the arrival of, and sublithospheric spreading associated with, the Siberian mantle plume head at ca. 250 Ma. The subsequent motion of the lithosphere relative to the plume-swell likely caused a northwestward migration of the uplifted regions. Taimyr and the polar Urals were probably affected. In the Jurassic, detrital-zircon spectra from Taimyr, Chukotka, the Kular Dome, and Svalbard show great differences, suggesting that these locations no longer shared the same provenance from Taimyr and the Urals. The restricted distribution of detritus from Taimyr and the Urals indicates that erosion of the Uralian orogen was reduced. In the Late Jurassic, the depositional setting of southern Taimyr probably changed from a foreland to an intracratonic basin.

Keyword
PERMIAN-TRIASSIC BOUNDARY, LARGE IGNEOUS PROVINCE, FRANZ JOSEF LAND, SIBERIAN TRAPS, ICP-MS, GEOCHRONOLOGICAL DATA, CONTINENT COLLISION, SEVERNAYA ZEMLYA, FORELAND BASINS, RAPID ERUPTION
National Category
Geology
Research subject
Geology
Identifiers
urn:nbn:se:su:diva-119041 (URN)10.1130/b31241.1 (DOI)000370073300003 ()
Available from: 2015-07-27 Created: 2015-07-27 Last updated: 2017-12-04Bibliographically approved
3. Provenance of Late Carboniferous to Jurassic sandstones for southern Taimyr, Arctic Russia: A comparison of heavy mineral analysis by optical and QEMSCAN methods
Open this publication in new window or tab >>Provenance of Late Carboniferous to Jurassic sandstones for southern Taimyr, Arctic Russia: A comparison of heavy mineral analysis by optical and QEMSCAN methods
(English)Manuscript (preprint) (Other academic)
Keyword
sandstone, provenance, heavy minerals, Uralian orogen, QEMSCAN
National Category
Geology
Research subject
Geology
Identifiers
urn:nbn:se:su:diva-119043 (URN)
Available from: 2015-07-27 Created: 2015-07-27 Last updated: 2016-01-29Bibliographically approved
4. Thermotectonic history of the Taimyr fold and thrust belt, Russia, from apatite fission track analysis and balanced cross section restoration
Open this publication in new window or tab >>Thermotectonic history of the Taimyr fold and thrust belt, Russia, from apatite fission track analysis and balanced cross section restoration
(English)Manuscript (preprint) (Other academic)
National Category
Geology
Research subject
Geology
Identifiers
urn:nbn:se:su:diva-119044 (URN)
Available from: 2015-07-27 Created: 2015-07-27 Last updated: 2016-01-29Bibliographically approved

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