Trummer, Irmgard and Flueh, Ernst R. and Paganini Working Group (2002) Seismic constraints on the crustal structure of Cocos Ridge off the coast of Costa Rica. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 225 (1). pp. 25-37.

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Abstract

In late 1999, seismic and seismological investigations were carried out
on the Continental margin of Costa Rica. Besides conventional wide angle refraction
profiles, airgun shots were fired on a sub circular profile around Osa Peninsula
into Golfo Dulce and were recorded by 20 ocean bottom hydrophones deployed
along the crest of Cocos Ridge and by 13 Seismometers across the ridge. The
resulting uneven distribution of shots and receivers does not allow for a full 3Dtomographic
inversion. However, for selected parts detailed velocity information
can be obtained providing constraints on the structure of the subsurface. Preliminary
results indicate that Cocos Ridge has a bowl-shaped crustal root with a thickness
of nearly 20 km in its center and only small changes along strike within the
first 50 km seaward of the Middle America trench.

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