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Titolo:
The relationship of the Cocos and Carnegie ridges: age constraints from paleogeographic reconstructions
Autore:
Meschede, M; Barckhausen, U;
Indirizzi:
Univ Tubingen, Inst Geol & Palaontol, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 aontol, D-72076 Tubingen, Germany Bundesanstalt Geowissensch & Rohstoffe, D-30655 Hannover, Germany Bundesanstalt Geowissensch & Rohstoffe Hannover Germany D-30655 Germany
Titolo Testata:
INTERNATIONAL JOURNAL OF EARTH SCIENCES
fascicolo: 2, volume: 90, anno: 2001,
pagine: 386 - 392
SICI:
1437-3254(200106)90:2<386:TROTCA>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
COSTA-RICA; PLATE MOTION; MARGIN;
Keywords:
Eastern Pacific; Galapagos hotspot; oceanic crust; plate tectonic evolution; Cocos ridge; Carnegie ridge; Malpelo ridge; Coiba ridge; hotspot trace;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Meschede, M Univ Tubingen, Inst Geol & Palaontol, Sigwartstr 10, D-72076 Tubingen, Germany Univ Tubingen Sigwartstr 10 Tubingen Germany D-72076 Germany
Citazione:
M. Meschede e U. Barckhausen, "The relationship of the Cocos and Carnegie ridges: age constraints from paleogeographic reconstructions", INT J E SCI, 90(2), 2001, pp. 386-392

Abstract

Paleogeographic restorations for the oceanic crust formed by the Cocos-Nacza spreading center and its precursors were performed to reconstruct the history and ages of the submarine aseismic ridges in the Eastern Pacific Basin, the Carnegie, Coiba, Cocos, and Malpelo ridges. The bipartition of the Carnegie ridge reflects the shift from a precursor to the presently active Cocos-Nazca spreading center. The Cocos ridge is partly composed of productsfrom the Galapagos hotspot but may also contain material from a second center of volcanic activity which is located approximately 600 km NE of Galapagos. The Malpelo ridge is a product of this second hotspot center, whereas the Coiba ridge probably formed at the Galapagos hotspot. The geometric relationship of the Cocos and Carnegie ridges indicates symmetric spreading and a constant northward shift of the presently active Cocos-Nazca spreading center.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 09:10:37