Oblique rift geometry of the West Siberian Basin; tectonic setting for the Siberian flood basalts

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doi: 10.1144/0016-76492006-096
Authors:Allen, Mark B.; Anderson, Lester; Searle, Roger C.; Buslov, Misha
Author Affiliations:Primary:
Durham University, Department of Earth Sciences, Durham, United Kingdom
Other:
University of Cambridge, United Kingdom
Russian Academy of Sciences, Russian Federation
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, 163(6), p.901-904. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:2006
Note:In English. 32 refs.; geol. sketch maps
Summary:We use magnetic intensity data to determine the geometries of basalt-filled rifts of the West Siberian Basin. En echelon graben arrays suggest a component of right-lateral, north-south shear during east-west extension (present co-ordinates). Several major exposed faults at the basin margins, mainly within the Altaid orogenic belt, underwent right-lateral strike-slip in the Late Permian-Early Triassic interval. The combined datasets show that the Siberian flood basalts were erupted during right-lateral oblique extension between the Urals and the Siberian craton, centred on a triple junction in the NE of the West Siberian Basin.
Sections:Petrology
Subsections:General; Igneous rocks
Subjects:Basalts; Crustal thinning; Extension; Faults; Flood basalts; Geometry; Grabens; Igneous rocks; Kinematics; Lateral faults; Lower Triassic; Magnetic anomalies; Mantle plumes; Mesozoic; Models; Oblique orientation; Orogenic belts; Paleozoic; Permian; Rift zones; Right-lateral faults; Shear; Strike-slip faults; Tectonics; Triassic; Triple junctions; Upper Permian; Volcanic rocks; Asia; Commonwealth of Independent States; Russian Federation; Russian Platform; Siberian Lowland; Siberian Platform; Urals; West Siberia; Altaids
Coordinates:N400000 N750000 E0900000 E0600000
Abstract Numbers:06M/4294
Record ID:2006085591
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States, Reference includes data from The Geological Society, London
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