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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Arctic Ocean
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Amerasia Basin (1)
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Barents Sea (1)
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Arctic region
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Russian Arctic
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Novaya Zemlya (2)
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Asia
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Chukotka Russian Federation
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Chukchi Peninsula (1)
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Kolyma Uplift (1)
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Taymyr Peninsula (3)
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Yakutia Russian Federation
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Verkhoyansk Range (1)
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Commonwealth of Independent States
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Russian Federation
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Arkhangelsk Russian Federation
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Novaya Zemlya (2)
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Chukotka Russian Federation
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Chukchi Peninsula (1)
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Kolyma Uplift (1)
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Taymyr Peninsula (3)
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Russian Arctic
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Novaya Zemlya (2)
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Yakutia Russian Federation
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Verkhoyansk Range (1)
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Urals
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Novaya Zemlya (2)
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Europe
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Arkhangelsk Russian Federation
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Novaya Zemlya (2)
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Fennoscandian Shield (1)
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United States
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Alaska
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geochronology methods
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fission-track dating (2)
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thermochronology (2)
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geologic age
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Mesozoic
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Paleozoic
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upper Paleozoic (2)
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upper Precambrian
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igneous rocks
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igneous rocks
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plutonic rocks
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granites (1)
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metamorphic rocks
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metamorphic rocks
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metasedimentary rocks (1)
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minerals
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phosphates
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apatite (1)
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silicates
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orthosilicates
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nesosilicates
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zircon group
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zircon (2)
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Primary terms
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absolute age (2)
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Arctic Ocean
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Amerasia Basin (1)
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Barents Sea (1)
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Arctic region
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Russian Arctic
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Novaya Zemlya (2)
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Asia
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Chukotka Russian Federation
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Chukchi Peninsula (1)
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Kolyma Uplift (1)
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Krasnoyarsk Russian Federation
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Taymyr Dolgan-Nenets Russian Federation
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Taymyr Peninsula (3)
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Yakutia Russian Federation
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Verkhoyansk Range (1)
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deformation (3)
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Europe
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Arkhangelsk Russian Federation
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Novaya Zemlya (2)
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Fennoscandian Shield (1)
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faults (1)
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geochronology (2)
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igneous rocks
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plutonic rocks
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granites (1)
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Mesozoic
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Triassic
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Lower Triassic (1)
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Upper Triassic (2)
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metamorphic rocks
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metasedimentary rocks (1)
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orogeny (1)
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paleogeography (1)
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Permian
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upper Paleozoic (2)
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Precambrian
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upper Precambrian
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sedimentary rocks
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clastic rocks
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sandstone (2)
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sedimentation (1)
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sediments (1)
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stratigraphy (1)
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structural analysis (1)
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tectonics (4)
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United States
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Alaska
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Brooks Range (1)
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rock formations
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Siberian Traps (1)
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sedimentary rocks
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sedimentary rocks
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sandstone (2)
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sediments
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sediments (1)
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Abstract The exhumation and shortening history associated with the Taimyr fold–thrust belt is determined using apatite fission track and balanced cross-section analysis. Eighteen samples from across northern, central and southern Taimyr are used for apatite fission track analysis. These include granite, meta-arenite and sandstone samples with stratigraphic ages ranging from the late Proterozoic to Early Cretaceous. Fission track lengths and central ages are used to model the thermal history of the region and indicate three episodes of cooling in the Early Permian, earliest Triassic and Late Triassic. The thermochronological data are integrated with two balanced regional cross-sections. The regional structural style of deformation reflects a thick-skinned thrust system with 15% shortening (minimum estimate). This is consistent with thickening during early Permian Uralian orogenesis, followed by later heating, uplift and cooling associated with Siberian Trap magmatism and/or Mesozoic transpression.
Abstract To better understand the sediment provenance and exhumation history of Novaya Zemlya’s Mesozoic fold–thrust belt, we apply detrital zircon U–Pb geochronology combined with zircon and apatite fission track analyses to samples from the Precambrian to late Permian siliciclastic successions of the southern and northern islands. The Silurian to early Devonian samples are dominated by zircons (1.14–0.9 Ga) characteristic of the Sveconorwegian Orogen. Zircon fission track ages for individual units are older than their stratigraphic ages and consistent with single-age population distributions. The zircon fission track results document no annealing after deposition and therefore preserve provenance information, which indicates that the source rock(s) of each sample most likely experienced the same thermal event. The results support the erosion and recycling of Sveconorwegian-aged zircon from the Fennoscandian shield during Caledonian orogenesis to the Barents Sea Shelf and Novaya Zemlya. Apatite fission track ages and thermal modelling identify a rapid cooling event at 220–210 Ma, consistent with late Triassic deformation on Novaya Zemlya. Supplemental material: Detrital zircon U–Pb LA-ICP-MS data of samples from Novaya Zemlya, is available at https://doi.org/10.6084/m9.figshare.c.3787364