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20 p, 4.4 MB Geochemistry and Geochronology of the Guajira Eclogites, northern Colombia : evidence of a metamorphosed primitive Cretaceous Caribbean Island-arc / Weber, M. (Universidad Nacional de Colombia) ; Cardona, A. (Smithsonian Tropical Research Institute) ; Valencia, V. (The University of Arizona. Department of Geosciences) ; Altenberger, U. (Potsdam Universität) ; López-Martínez, M. (Centro de Investigación Científica y de Educación Superior de Ensenada (Mèxic). Departamento de Geología) ; Tobón, M. (Universidad Nacional de Colombia) ; Zapata, S. (Universidad Nacional de Colombia) ; Zapata, G. (Universidad Nacional de Colombia) ; Concha, A. E. (Universidad Nacional de Colombia)
The chemical composition of eclogites, found as boulders in a Tertiary conglomerate from the Guajira Peninsula, Colombia suggests that these rocks are mainly metamorphosed basaltic andesites. They are depleted in LILE elements compared to MORB, have a negative Nb-anomaly and flat to enriched REE patterns, suggesting that their protoliths evolved in a subduction related tectonic setting. [...]
2011 - 10.1344/105.000001740
Geologica acta, Vol. 9, Núm. 3-4 (setembre-desembre 2011) , p. 425-443  

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