The Tectonics of the Altaids: Crustal Growth During the Construction of the Continental Lithosphere of Central Asia Between ∼750 and ∼130 Ma Ago

The largest mountain belt in Central Asia (∼9 million km 2 ) is called the Altaids. It was assembled between ∼750 and ∼130 Ma ago around the western and southern margins of the Siberian Craton, partly on an older collisional system (the "Urbaykalides"). Geological, geophysical, and geochem...

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Published inAnnual review of earth and planetary sciences Vol. 46; no. 1; pp. 439 - 494
Main Authors engör, A.M. Celâl, Natal'in, Boris A, Sunal, Gürsel, van der Voo, Rob
Format Journal Article
LanguageEnglish
Published Palo Alto Annual Reviews 30.05.2018
Annual Reviews, Inc
Subjects
Altaids
Central Asia
Construction
Continental crust
continental lithosphere
Cratons
crustal growth
disruption of orogens
Geophysics
Growth
Growth rate
Lithosphere
magmatic arcs
Orogeny
Phanerozoic
Plate tectonics
Studies
Tectonics
Central Asia
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Summary:The largest mountain belt in Central Asia (∼9 million km 2 ) is called the Altaids. It was assembled between ∼750 and ∼130 Ma ago around the western and southern margins of the Siberian Craton, partly on an older collisional system (the "Urbaykalides"). Geological, geophysical, and geochemical data-mostly high-resolution U-Pb ages-document the growth of only three arc systems in Central and Northwest Asia during this time period, an interval throughout which there were no major arc or continental collisions in the area. While the Altaids were being constructed as a Turkic-type orogen, continental crust grew in them by 1 3 of the global total. The Altaids thus added some 3 million km 2 to the continental crust over a period of 0.6 billion years, typical of Phanerozoic crustal growth rates.
ISSN:0084-6597
1545-4495
DOI:10.1146/annurev-earth-060313-054826