Riphean basins of the central and western Siberian Platform

Фролов, С. В.; Ахманов, Г.Г.; Kozlova, Elena; Крылов, О. В.; Sitar, K.; Galushkin, Yuriy I.

doi:10.1016/j.marpetgeo.2010.01.023

Cited by 32 publications

(33 citation statements)

References 11 publications

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“…Isostasy in the Tunguska basin is achieved by thick sediments and the large depth of the intraecrustal discontinuity compensating the 0.5e1.0 kmthick lavas. This feature is consistent with the available geological evidence of the Tunguska basin formation followed by the trap magmatism (Czamanske et al, 1998;Ivanov, 2007;Foulger, 2010;Frolov et al, 2011). Note also that the velocity in the lower crust beneath Tunguska does not differ from that in Yakutia, which rules out plumeerelated thermal velocity effects (Foulger, 2010;Korenaga et al, 2002;Ridley and Richards, 2010).…”

Section: Discussionsupporting

confidence: 86%

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Seismic and density heterogeneities of lithosphere beneath Siberia: Evidence from the Craton long-range seismic profile

et al. 2015

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The estimate of seismic lithosphere thickness in Siberia remains controversial in spite of long-range controlledesource data available from peaceful nuclear explosions (PNE). Published models of layered upper mantle based on this evidence fail to unambiguously constrain the asthenospheric depth. The observed velocity changes may be due either to vertical layering or to lateral heterogeneity, which are difficult to discriminate because of large (1000 km) PNE spacing. Among the upper mantle models, obtained with reference to Moho velocities derived from higher-resolution chemical explosion data, we focus especially on lateral density heterogeneity. The model reveals three velocity layers, with velocities 8.0e8.5 km/s in Layer 1, 8.6e8.7 km/s in Layer 2, and~8.5 km/s in Layer 3. Layers 2, which varies strongly in thickness, may consist of dense eclogite, judging by the high velocities. Its base may correspond to the base of the lithosphere underlain by the lower-velocity asthenospheric material of Layer 3.The lateral variations in velocity within Layer 1 and in thickness of Layer 2 correlate with major tectonic units: the West Siberian basin, the Tunguska basin with the PermianeTriassic continental flood basalts (the large igneous province of Siberian Traps), as well as the Vilyui basin and the Yakutian kimberlite province. Isostasy in the West Siberian and Vilyui basins results in thick sediments and thin crust, while the large depths of the basement and the intraecrustal discontinuity in the Tunguska basin isostatically compensate the elevated surface topography due to voluminous lavas. The magmatism left its imprint in the mantle as an attenuated "eclogitic layer" beneath the Tunguska basin. However, the available data are still insufficient to understand the exact causes of this attenuation, because mantle conditions may have changed during the elapsed 250 m.y. since then.

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Section: Discussionsupporting

confidence: 86%

“…1). The major tectonic units and igneous provinces show up as changes in the thickness of sediments of different ages and in the respective basement topography (Egorkin et al, 1987;Frolov et al, 2011;Nikishin et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Seismic and density heterogeneities of lithosphere beneath Siberia: Evidence from the Craton long-range seismic profile

et al. 2015

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“…The Oktyabrsk complex is one of several hundred pipe structures formed via high temperature interactions between Tunguska Basin sediments and magma driven by the emplacement of Siberian Trap sill intrusions (Von der Flaass, 1997). Mature hydrocarbons from Cambrian source rocks also existed in the Tunguska Basin by the end-Permian (Frolov et al, 2011;Polyansky et al, 2003) and basin modeling suggested that the sill emplacement was associated with a major pulse of gas generation (Frolov et al, 2011). The high temperatures that would have been required to deposit the metal ores in the diatreme, would have resulted in transformation and boiling of any hydrocarbons or organic matter in the basin, producing a suite of carbon gases, including CO 2 , CO, and CH 4 , enriched in 12 C. Given the opportunity for magmatic CO 2 and heating of organic matter around sills, it is reasonable to expect that carbon gases were emitted to the atmosphere through structures in the upper crust as occurs in present-day hydrothermal systems (Giggenbach et al, 1991;Pirrung et al, 2003).…”

Section: Carbon Isotope Record Interpretationmentioning

confidence: 99%

“…The first is thermogenic carbon, produced by contact metamorphic heating of Tunguska Basin petroleum and organic matter in the aureoles around Siberian Trap sills (Svensen et al, 2009). Ample reactive carbon existed in the form of mature hydrocarbon deposits in Neoproterozoic and Cambrian horizons by the end-Permian and immature organic matter throughout the basin in carbonates and marls of Cambrian to Silurian age (Frolov et al, 2011;Petrychenko et al, 2005;Zharkov, 1984). Although suggested in recent literature (Ogden and Sleep, 2012;Retallack and Jahren, 2008), coals of Devonian to Permian age were sparse and shallow in the southern portion of the Tunguska Basin and were unlikely to be major contributors of contact metamorphic carbon through the diatremes (Frolov et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

An integrated carbon isotope record of an end-Permian crater lake above a phreatomagmatic pipe of the Siberian Traps

Fristad

Pedentchouk

Roscher

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The lack of reliable palaeomagnetic data from cratonic basement has led to a number of different reconstructions for the two continents (Pisarevsky & Natapov 2003). Frost et al (1998) and Rainbird et al (1998) point out that stable platform sedimentation from 1.8 Ga combined with the lack of Grenville age deformation (1.25 -0.98 Ga) implies that the Siberian continent was on the northeastern periphery of Rodinia. It is believed that during Neoproterozoic time Siberia was located at equatorial/subtropical latitudes, south of the palaeoequator (Pavlov et al 2002;Cocks & Torsvik 2007).…”

Section: Tectonic Evolution Of East Siberiamentioning

confidence: 99%

The petroleum potential of the Riphean-Vendian succession of southern East Siberia

Howard¹,

Bogolepova²,

Gubanov³

et al. 2012

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The Siberian Platform covers an area of c. 4.5 million km 2 in the East Siberia region of Russia, up to 3.5 million km 2 of which is prospective for hydrocarbons. We review the Archaean to Neoproterozoic evolution of the Siberian Platform and the potential oil and gas resources of Riphean, Vendian and Infracambrian sediments. The Riphean was dominated by passive margin sedimentation and was intensely deformed during the Baikalian orogeny. Vendian strata record a clastic transgressive sequence and the eventual re-establishment of carbonate platform sedimentation. The late Vendian-early Cambrian is characterized by carbonate deposition including thick salt horizons, which form a regional seal. Hydrocarbon maturation and migration from Riphean and Vendian source rocks occurred during the late Neoproterozoic and Early Palaeozoic, indicating that hydrocarbon reservoirs on the Siberian Platform may have hosted their reserves over a remarkable period of geological time. Despite many years of hydrocarbon exploration in East Siberia, many regions remain under-explored, and aspects of the proven hydrocarbon systems are poorly understood. There are undoubtedly more major discoveries to be made in the region, and the Infracambrian succession of the southern Siberian Platform therefore represents an irresistible target for further hydrocarbon exploration.

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Riphean basins of the central and western Siberian Platform

Cited by 32 publications

References 11 publications

Seismic and density heterogeneities of lithosphere beneath Siberia: Evidence from the Craton long-range seismic profile

Seismic and density heterogeneities of lithosphere beneath Siberia: Evidence from the Craton long-range seismic profile

An integrated carbon isotope record of an end-Permian crater lake above a phreatomagmatic pipe of the Siberian Traps

The petroleum potential of the Riphean-Vendian succession of southern East Siberia

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