Paleozoic history of the Kara microcontinent and its relation to Siberia and Baltica: Paleomagnetism, paleogeography and tectonics

Метелкин, Д. В.; Vernikovsky, V. A.; Kazansky, A. Yu.; Bogolepova, Olga K.; Gubanov, Alexander P.

doi:10.1016/j.tecto.2005.02.008

Cited by 86 publications

(57 citation statements)

References 22 publications

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“…This is a very active area of research underpinned by recent U-Pb age dating of various detrital zircon populations [29-31, 72, 82, 98, 101, 120, 179], and by very limited paleomagnetic results [95,168]. Two main concepts are being discussed: (1) Neoproterozoic Baltica affinity many of these terranes; (2) their origin from a dismembered Precambrian continent (based on an earlier Arctida concept of [181]; e.g., [169]).…”

Section: Discussionmentioning

confidence: 99%

“…To the north, it can be traced in the magnetic field under the Pechora Sea up to the southern slope of the East Barents Megatrough (see below). The Timanian basement is inferred to underlie Southern Island of the Novaya Zemlya Archipelago [17,116], and the North Kara Province, which is also referred to as a North Kara Terrane or microcontinent [29,[88][89][90]95].…”

Section: Neoproterozoic Timanian Fold Belt (Tfb)mentioning

confidence: 99%

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Fold belts and sedimentary basins of the Eurasian Arctic

Drachev¹

2016

Arktos

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The vast Eurasian Arctic epicontinental shelf and adjoining mainland has a very complex structure and tectonic history as a result of a series of continent-continent collisions, accretion of terranes and crustal extension phases during Neoproterozoic and Phanerozoic times. Significant parts of major Eurasian fold belts extend far north into the Arctic below thick infill of post-orogenic sedimentary basins, where their architecture remains highly disputed. Large Eurasian Arctic sedimentary basins formed as a result of orogenic collapse, back-arc extension, or intracontinental extension associated with the breakup of the Laurussia, Laurasia, Pangea and Eurasia supercontinents. There are over 40 sedimentary basins of variable age and genesis which are thought to bear significant undiscovered hydrocarbon resources in the region. This article reviews the current state-of-knowledge of Eurasian Arctic tectonics and highlights questions that remain to be addressed. The overall focus is on the Russian sector of the Arctic being less known to a broad geoscience community.

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Section: Discussionmentioning

confidence: 99%

Section: Neoproterozoic Timanian Fold Belt (Tfb)mentioning

confidence: 99%

Fold belts and sedimentary basins of the Eurasian Arctic

Drachev¹

2016

Arktos

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“…North Taimyr is characterized by Precambrian basement with strongly deformed Precambrian to Early Palaeozoic flysch deposits that are intruded by Late Palaeozoic Uralian collisional granites. North Taimyr has been interpreted to be an independent crustal block (i.e., the North Kara Terrain or North Kara Massif; Metelkin et al, 2005), and detrital zircon ages indicate that it was probably part of Baltica in Early Palaeozoic time (Pease and Scott, 2009). The Central Taimyr zone, separated from North Taimyr by the Main Taimyr Thrust, contains a weakly to unmetamorphosed Late Neoproterozoic (Vendian) to Early Palaeozoic continental margin succession which unconformably overlies various Precambrian crystalline units.…”

Section: Geological Settingmentioning

confidence: 99%

Petrogenesis and timing of mafic magmatism, South Taimyr, Arctic Siberia: A northerly continuation of the Siberian Traps?

Reichow

Saunders

Scott

et al. 2016

Lithos

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The Siberian large igneous province (LIP) forms the world's most extensive continental exposure of basalt and has several sub-provinces surrounding it, which may be genetically related. The Taimyr peninsula of north Siberia is one of these sub-provinces and is frequently assumed to be the northerly continuation of the basalts exposed at Noril'sk, the best-studied area of the Siberian LIP. However, the correlation is uncertain. The major and trace element data for both groups are consistent with a process of fractional crystallisation coupled with small degrees of assimilation of incompatibleelement-enriched lower crust involving different contaminants. Trace element model calculations indicate a process of magma formation at large degrees of partial melting and at pressures of less than 3 GPa, probably within the garnet-spinel transition zone or the spinel stability field of the asthenospheric mantle. We obtained an argon plateau age of ~252 (252.7 ± 1.5) Ma and a ~239 Ma total fusion age from a Taimyr lava and intrusive sample, respectively, confirming that volcanism is only partly contemporaneous with the activity of the Siberian LIP. Although this is in agreement with previous interpretations, we argue that the age difference between both events is only ~13 myrs and probably less (~5 myrs) although further investigation of the relationship is required. Our data allow correlation with distinct Noril'sk members and most importantly to the ore-bearing (Ni-Cu) intrusions implying that whole rock chemistry could have value as a prospecting tool in Taimyr.

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“…Lorenz et al 2008) or as an independent terrane (e.g. Metelkin et al 2000Metelkin et al , 2005Torsvik & Andersen 2002;Cocks & Torsvik 2005) between Baltica and Siberia in the Ordovician Period. During the Cambrian and Ordovician, Baltica rotated through more than 120 degrees and drifted northwards from high to low palaeolatitudes.…”

Section: Geological Settingmentioning

confidence: 99%