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A discussion of "hidden subduction" in orogenic belts

A. M. C. Sengor and John F. Dewey
A discussion of "hidden subduction" in orogenic belts
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (March 2020) 57 (3): 418-425

Abstract

The McKenzie et al. (2019) model concerning the cause of the deep earthquakes in the Hindu Kush region in Asia greatly resembles the hidden subduction model proposed earlier. However, in the case of the Hindu Kush, the age of the disappearance of the Tethyan waters was early Jurassic and the sutures were overlain by early Cretaceous sedimentary cover. The question then becomes how long a "subcutaneous" oceanic lithosphere can survive within a continent. It seems that the "oceanic" basement of the North Caspian Depression has been there since the late Palaeozoic, which is encouraging for the McKenzie et al. model. Whether an already subducted slab can also survive for more than 100 million years attached to its continental continuation remains an unanswered question. In the examples with which we are familiar (eastern Turkey, Apennines, Magrebides, Betic and Rif cordilleras), subducted lithosphere became detached at most 25 million years after collision.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 57
Serial Issue: 3
Title: A discussion of "hidden subduction" in orogenic belts
Affiliation: Istanbul Teknik Universitesi, Maden Fakultesi, Istanbul, Turkey
Pages: 418-425
Published: 202003
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 45
Accession Number: 2020-028746
Categories: Solid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Annotation: For reference to original see McKenzie, D., Jackson, J., and Priestly, K., Canadian Journal of Earth Sciences, Vol. 56, No. 11, p. 1101-1118, DOI: 10.1139/cjes-2018-0289, 2019
Illustration Description: illus. incl. geol. sketch maps
Secondary Affiliation: University of Oxford, GBR, United Kingdom
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Reference includes data from Canadian Science Publishing, NRC Research Press, Ottawa, ON, Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202009
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