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Tectonic models for accretion of the Central Asian orogenic belt

Brian F. Windley, Dmitriy Alexeiev, Xiao Wenjiao, Alfred Kroener and Gombosuren Badarch
Tectonic models for accretion of the Central Asian orogenic belt
Journal of the Geological Society of London (January 2007) 164 (1): 31-47

Abstract

The Central Asian Orogenic Belt (c. 1000-250 Ma) formed by accretion of island arcs, ophiolites, oceanic islands, seamounts, accretionary wedges, oceanic plateaux and microcontinents in a manner comparable with that of circum-Pacific Mesozoic-Cenozoic accretionary orogens. Palaeomagnetic and palaeofloral data indicate that early accretion (Vendian-Ordovician) took place when Baltica and Siberia were separated by a wide ocean. Island arcs and Precambrian microcontinents accreted to the active margins of the two continents or amalgamated in an oceanic setting (as in Kazakhstan) by roll-back and collision, forming a huge accretionary collage. The Palaeo-Asian Ocean closed in the Permian with formation of the Solonker suture. We evaluate contrasting tectonic models for the evolution of the orogenic belt. Current information provides little support for the main tenets of the one- or three-arc Kipchak model; current data suggest that an archipelago-type (Indonesian) model is more viable. Some diagnostic features of ridge-trench interaction are present in the Central Asian orogen (e.g. granites, adakites, boninites, near-trench magmatism, Alaskan-type mafic-ultramafic complexes, high-temperature metamorphic belts that prograde rapidly from low-grade belts, rhyolitic ash-fall tuffs). They offer a promising perspective for future investigations.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 164
Serial Issue: 1
Title: Tectonic models for accretion of the Central Asian orogenic belt
Affiliation: University of Leicester, Department of Geology, Leicester, United Kingdom
Pages: 31-47
Published: 200701
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 122
Accession Number: 2007-008429
Categories: Structural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch maps, sects.
N48°45'00" - N52°30'00", E84°00'00" - E90°00'00"
N41°00'00" - N55°00'00", E47°00'00" - E86°00'00"
N50°00'00" - N80°00'00", W170°00'00" - E60°00'00"
N36°00'00" - N40°19'60", E76°00'00" - E92°19'60"
Secondary Affiliation: Russian Academy of Sciences, RUS, Russian FederationChinese Academy of Sciences, CHN, ChinaUniversitaet Mainz, DEU, Federal Republic of GermanyMongolian Academy of Sciences, MNG, Mongolia
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200704
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