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Crustal volumes of the continents and of oceanic and continental submarine plateausUsing global topographic data and the assumption of Airy isostasy, it is estimated that the crustal volume of the continents is 7182 X 10 to the 6th cu km. The crustal volumes of the oceanic and continental submarine plateaus are calculated at 369 X 10 to the 6th cu km and 242 X 10 to the 6th cu km, respectively. The total continental crustal volume is found to be 7581 X 10 to the 6th cu km, 3.2 percent of which is comprised of continental submarine plateaus on the seafloor. An upper bound on the contintental crust addition rate by the accretion of oceanic plateaus is set at 3.7 cu km/yr. Subduction of continental submarine plateaus with the oceanic lithosphere on a 100 Myr time scale yields an upper bound to the continental crustal subtraction rate of 2.4 cu km/yr.
Document ID
19890051635
Document Type
Reprint (Version printed in journal)
Authors
Schubert, G. (California, University Los Angeles, United States)
Sandwell, D. (Texas, University Austin, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1989
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 92
Issue: 2 Ma
ISSN: 0012-821X
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSG-7315
CONTRACT_GRANT: NAG5-787
CONTRACT_GRANT: NSF OCE-86-09141
Distribution Limits
Public
Copyright
Other