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Seismic evidence for the fault origin of oceanic deeps

Benioff, Hugo (1949) Seismic evidence for the fault origin of oceanic deeps. Geological Society of America Bulletin, 60 (12). pp. 1837-1856. ISSN 0016-7606. https://resolver.caltech.edu/CaltechAUTHORS:20140731-162317858

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Abstract

A method is described for determining the elastic-rebound strain increments associated with earthquakes occurring on a particular fault. For a given sequence of earthquakes, a graph of the accumulated increments so determined plotted against time represents the actual fault movement during the interval covered by the sequence. The method also provides a means for determining whether or not a chosen sequence of earthquakes represents movements of a single fault structure. In this way it becomes possible to discover faults which otherwise may escape detection. Evidence of this kind is offered which indicates that the Tonga-Kermadec and South American sequences of earthquakes originate on great faults which dip under the continental masses. The faults are approximately 2500 km. and 4500 km. in length respectively. Their transverse dimensions are approximately 900 km. each. They both extend to a depth of approximately 650 km.—more than one tenth of the radius of the earth. The oceanic deeps associated with these faults are surface expressions of the downwarping of their oceanic blocks. The upwarping of their continental blocks have produced islands in the Tonga-Kermadec region and the Andes Mountains in South America.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1130/0016-7606(1949)60[1837:SEFTFO]2.0.CO;2DOIArticle
http://bulletin.geoscienceworld.org/content/60/12/1837PublisherArticle
Additional Information:Copyright © 1949, The Geological Society of America, Inc. Received July 8, 1949.
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological Sciences505
Issue or Number:12
Record Number:CaltechAUTHORS:20140731-162317858
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140731-162317858
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47750
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:01 Aug 2014 14:43
Last Modified:03 Oct 2019 06:56

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