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Superplumes or supercontinents?: Comment and Reply (Sheridan)

Anderson, Don L. (1994) Superplumes or supercontinents?: Comment and Reply (Sheridan). Geology, 22 (8). pp. 764-765. ISSN 0091-7613. https://resolver.caltech.edu/CaltechAUTHORS:20140509-135349745

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Abstract

Anderson (1994) addressed a fundamental tectonic question: What is the role of "superplumes" in the pulses of Earth? Larson (1991a) attributed the mid-Cretaceous pulse to a superplume rising directly from the core-mantle boundary to create the Pacific large igneous provinces (LIPs). Anderson (1994) questioned this superplume explanation for magmatism, increased spreading rates, and other phenomena of the Cretaceous pulse; he interpreted these phenomena as being the result of episodic plate reorganizations. He pointed out that nonplume explanations are required for many LIPs. For example, preexisting lithospheric sutures localize mantle upwellings along rifted continental edges (Sheridan et al., 1993). Anderson (1994) stated that plate reorganizations allow magmas to passively intrude newly extended lithosphere from two long-lived upper-mantle hot domains, one under the Pacific and one under Pangea. He interpreted the mid-Cretaceous pulse of rapid expansion of the Pacific plate as genetically related to the breakup of Pangea.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1130/0091-7613(1994)022<0763:SOSCAR>2.3.CO;2DOIArticle
http://geology.gsapubs.org/content/22/8/763PublisherArticle
http://geology.gsapubs.org/content/22/8/763PublisherArticle
http://geology.geoscienceworld.org/content/22/1/39Related ItemOriginal Article
Additional Information:© 1994 Geological Society of America.
Issue or Number:8
Record Number:CaltechAUTHORS:20140509-135349745
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140509-135349745
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45649
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 May 2014 20:37
Last Modified:03 Oct 2019 06:34

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