Late Palaeozoic magmatism of Northern Taimyr: new insights into the tectonic evolution of the Russian High Arctic

Kurapov, Mikhail; Ershova, Victoria; Khudoley, A. K.; Luchitskaya, M. V.; Makariev, Alexander; Makarieva, Elena; Vishnevskaya, I.A.

doi:10.1080/00206814.2020.1818300

Cited by 14 publications

(29 citation statements)

References 68 publications

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“…Another proposed sediment source area of the Greater Barents Sea Basin is the Taimyr orogen (e.g., Fleming et al, 2016;Harstad et al, in revision). The Taimyr Orogen resulted from the collision of the Kara terrane and Siberian craton in the Carboniferous to Early Permian (Vernikovsky et al, 2003;Kurapov et al, 2020). Magmatic rocks dated to ca.…”

Section: Maximum Catchment Relief (R)mentioning

confidence: 99%

Linking sediment supply variations and tectonic evolution in deep time, source-to-sink systems—The Triassic Greater Barents Sea Basin

Gilmullina

Klausen²,

Doré

et al. 2021

GSA Bulletin

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Triassic strata in the Greater Barents Sea Basin are important records of geodynamic activity in the surrounding catchments and sediment transport in the Arctic basins. This study is the first attempt to investigate the evolution of these source areas through time. Our analysis of sediment budgets from subsurface data in the Greater Barents Sea Basin and application of the BQART approach to estimate catchment properties shows that (1) during the Lower Triassic, sediment supply was at its peak in the basin and comparable to that of the biggest modern-day river systems, which are supplied by tectonically active orogens; (2) the Middle Triassic sediment load was significantly lower but still comparable to that of the top 10 largest modern rivers; (3) during the Upper Triassic, sediment load increased again in the Carnian; and (4) there is a large mismatch (70%) between the modeled and estimated sediment load of the Carnian. These results are consistent with the Triassic Greater Barents Sea Basin succession being deposited under the influence of the largest volcanic event ever at the Permian-Triassic boundary (Siberian Traps) and concurrent with the climatic changes of the Carnian Pluvial Event and the final stages of the Northern Ural orogeny. They also provide a better understanding of geodynamic impacts on sedimentary systems and improve our knowledge of continental-scale sediment transport. Finally, the study demonstrates bypass of sediment from the Ural Mountains and West Siberia into the adjacent Arctic Sverdrup, Chukotka, and Alaska Basins in Late Carnian and Late Norian time.

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Section: Maximum Catchment Relief (R)mentioning

confidence: 99%

Linking sediment supply variations and tectonic evolution in deep time, source-to-sink systems—The Triassic Greater Barents Sea Basin

Gilmullina

Klausen²,

Doré

et al. 2021

GSA Bulletin

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“…The Taimyr-Severnaya Zemlya fold-and-thrust belt is considered a northward continuation of the late Paleozoic Uralian Orogen that formed in response to collision of the Kara Terrane with Siberia in the Late Carboniferous-Early Permian (Kurapov et al, 2020;Pease et al, 2015;Vernikovsky, 1996;Zonenshain et al, 1990). Compressional forces and tectonic activity ceased within the Taimyr-Severnaya Zemlya fold-and-thrust belt during the Early Permian, and it has subsequently formed the northern margin of the Siberian Craton (Kurapov et al, 2020;Vernikovsky, 1996). Various researchers (Khain et al, 1991;Saunders et al, 2005;Dobretsov et al, 2013a;Afanasenkov et al, 2016;Krivolutskaya et al, 2019) propose an extensional environment close to Siberian margins and within the West Siberian basin in the Late Permian-Early Triassic.…”

Section: ■ Geological Settingmentioning

confidence: 99%

“…Granite intrusions of different ages are known from the Taimyr-Severnaya Zemlya fold-and-thrust belt (Fig. 1B) and can be used to decipher the tectonic evolution of the region (Augland et al, 2019;Khudoley et al, 2018;Kurapov et al, 2018Kurapov et al, , 2020Lorenz et al, 2007;Pease et al, 2015;Vernikovsky, 1996;Vernikovsky et al, 1995Vernikovsky et al, , 1998aVernikovsky et al, , 1998bVernikovsky et al, , 2003Vernikovsky et al, , 2020. Latest Permian-Triassic intrusions are less prevalent and are mainly found across the northwestern part of the Taimyr Peninsula (Augland et al, 2019;Proskurnina et al, 2019;Vernikovsky et al, 2003).…”

Section: ■ Introductionmentioning

confidence: 99%

Latest Permian–Triassic magmatism of the Taimyr Peninsula: New evidence for a connection to the Siberian Traps large igneous province

et al. 2021

Self Cite

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This study presents new whole rock major and trace element, Sr-Nd isotopic, petrographic, and geochronologic data for seven latest Permian (Changhsingian)–Late Triassic (Carnian) granitoid intrusions of the northwestern and northeastern Taimyr Peninsula in the Russian High Arctic. U-Pb zircon ages, obtained using secondary ion mass spectrometry (SIMS), sensitive high-resolution ion microprobe (SHRIMP), and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), define the crystallization age of the Taimyr intrusions studied as ranging from ca. 253 Ma to 228 Ma, which suggests two magmatic pulses of latest Permian–Early Triassic and Middle–Late Triassic age. Ar-Ar dating of biotite and amphibole indicate rapid cooling of the intrusions studied, but Ar-Ar ages of several samples were reset by secondary heating and hydrothermal activity induced by the Middle–Late Triassic magmatic pulse. Petrographic data distinguish two groups of granites: syenite–monzonites and granites–granodiorites. Sr-Nd isotopic data, obtained from the same intrusions, show a variation of initial (87Sr/86Sr)i ratios between 0.70377 and 0.70607, and εNd(t) values range between –6.9 and 1.2. We propose that the geochemical and isotopic compositions of the Late Permian–Triassic Taimyr granites record the existence of a magma mush zone that was generated by the two pulses of Siberian Traps large igneous province (LIP) magmatism.

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“…After Ediacaran accretionary orogenesis the Taimyr margin was re-rifted in the late Ediacaran to early Cambrian with a rift-drift transition at ~525 Ma (105). A late Paleozoic orogeny was dated by Late Pennsylvanian to Early Permian thrusts and Permian granitic plutonism and metamorphism in the central Taimyr zone (106,107). This orogeny is considered a continuation of the Uralian suture.…”

Section: Taimyrmentioning

confidence: 99%

“…This orogeny is considered a continuation of the Uralian suture. We date the onset of collision at 288 Ma with the age of the youngest suprasubduction granites (107). Ar-Ar ages of ~272 Ma represent termination of Late Paleozoic collisional tectonic activity within Northern Taimyr (107).…”

Section: Taimyrmentioning

confidence: 99%

Hemispheric geochemical dichotomy of the mantle is a legacy of austral supercontinent assembly and deep subduction of continental crust

Jackson¹,

Macdonald²

2021

Preprint

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Oceanic hotspots with extreme enriched mantle radiogenic isotopic signatures—including high 87Sr/86Sr and low 143Nd/144Nd indicative of ancient subduction of continental crust—are restricted to the southern hemispheric mantle. However, the mechanisms responsible for concentrating subducted continental crust in the austral mantle are unknown. We show subduction of sediments and subduction eroded material, and lower continental crust delamination, cannot generate this spatially coherent austral domain. However, late Neoproterozoic to Paleozoic continental collisions—associated with the assembly of Gondwana and Pangea—were positioned predominantly in the southern hemisphere during the late Neoproterozoic appearance of widespread continental ultra-high-pressure (UHP, >2.7 gigapascals) metamorphic terranes, which marked the onset of deep subduction of upper continental crust. We propose that deep subduction of upper continental crust at ancient rifted-passive margins during austral supercontinent assembly, from 650-300 Ma, resulted in enhanced upper continental crust delivery into the southern hemisphere mantle. In contrast, EM domains are absent in boreal hotspots, for two reasons. First, continental crust subducted after 300—when the continents drifted into the northern hemisphere—has had insufficient time to return to the surface in plumes feeding northern hemisphere hotspots. Second, before the appearance of continental UHP rocks at 650 Ma, upper continental crust was not subducted to great depths, thus precluding its subduction into the northern hemisphere mantle during the Precambrian when continents may have been located in the northern hemisphere. Our model implies a recent formation of the austral EM domain, explains the geochemical dichotomy between austral and boreal hotspots, and may explain why austral hotspots outnumber boreal hotspots.

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Late Palaeozoic magmatism of Northern Taimyr: new insights into the tectonic evolution of the Russian High Arctic

Cited by 14 publications

References 68 publications

Linking sediment supply variations and tectonic evolution in deep time, source-to-sink systems—The Triassic Greater Barents Sea Basin

Linking sediment supply variations and tectonic evolution in deep time, source-to-sink systems—The Triassic Greater Barents Sea Basin

Latest Permian–Triassic magmatism of the Taimyr Peninsula: New evidence for a connection to the Siberian Traps large igneous province

Hemispheric geochemical dichotomy of the mantle is a legacy of austral supercontinent assembly and deep subduction of continental crust

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