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A synthesis of the stratigraphic and tectonic setting of the Uralian ophiolites

G. N. Savelieva and R. W. Nesbitt
A synthesis of the stratigraphic and tectonic setting of the Uralian ophiolites
Journal of the Geological Society of London (July 1996) 153, Part 4: 525-537

Abstract

The history of the Urals began in late Cambrian-early Ordovician times with the opening of a major extensional zone > or = 2500 km long. This extension created an ocean basin, which by the upper Ordovician, contained island arc volcanic rocks whose age gives a minimum estimate for the age of subduction (closure). The timing of the first obduction events is given by Upper Silurian-Lower Devonian ages for emplacement-related metamorphic zones at the base of the earlier ophiolitic nappes and the presence of ophiolite debris in formations of Upper Silurian age in the Tagil zone. At the same time as these earliest collisions, events were taking place on the W margin of the ocean basin, new crust was being generated to the E. This material was progressively moved (relatively) westwards until it too was obducted onto the European palte. Subsequent orogeny, which lasted until the Permo-Triassic, resulted in further disruption of the ophiolitic sequences and the development of serpentinite-bearing melanges unrelated to the initial collision event.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 153, Part 4
Title: A synthesis of the stratigraphic and tectonic setting of the Uralian ophiolites
Affiliation: Russian Academy of Sciences, Institute of Geology, Moscow, Russian Federation
Pages: 525-537
Published: 199607
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 57
Accession Number: 1996-072978
Categories: Solid-earth geophysicsStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., strat. cols., 1 plate, geol. sketch maps
N49°00'00" - N69°00'00", E58°00'00" - E65°00'00"
Secondary Affiliation: University of Southampton, GBR, United Kingdom
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Update Code: 199622
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