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  • 1
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    The Costa Rican Pacific margin: from accretion to erosion (2000)
    Schweizerbart
    In:  Zentralblatt für Geologie und Paläontologie / Teil 1, 1999 (7-8). pp. 669-678.
    Details
    Publication Date: 2019-01-21
    Description: The understanding of the tectonic processes shaping the Pacific margin off Costa Rica has undergone a dramatic evolution during the past 25 years. The margin, initially interpreted to be built by accretion of sediment from the ocean plate, is now interpreted as made of ophiolitic rocks that are exposed onshore, with no net accretion currently active. New seismic images indicate that upper plate tectonic erosion might be the dominant process. Erosion is accomplished in some cases through transport of large bodies from upper to lower plate by plate boundary readjustment. Subduction of seamounts locally accelerates tectonic erosion.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Ocean bottom seismics (2011)
    Springer
    In:  In: Encyclopedia of Solid Earth Geophysics, Vol. 1-2. , ed. by Gupta, H. K. Encyclopedia of Earth Sciences Series . Springer, Heidelberg, Germany, pp. 901-918. 1. ed. ISBN 978-90-481-8701-0
    Details
    Publication Date: 2020-08-03
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
  • 3
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    The seismogenic zone in the Central Costa Rican Pacific margin: high-quality hypocenters from an amphibious network (2014)
    Springer
    In:  International Journal of Earth Sciences, 103 (7). pp. 1747-1764.
    Details
    Publication Date: 2017-05-23
    Description: Transition from subduction of normal to thickened oceanic crust occurs in the central portion of the Costa Rican margin, where large interplate earthquakes (M * 7) and abundant interseismic seismicity have been associated with subduction of bathymetric highs. We relocated *1,300 earthquakes recorded for 6 months by a combined on- and offshore seismological network using probabilistic earthquake relocation in a 3D P-wave velocity model. Most of the seismicity originated at the seismogenic zone of the plate boundary, appearing as an 18° dipping, planar cluster from 15 to 25–30 km depth, beneath the continental shelf. Several reverse focal mechanisms were resolved within the cluster. The upper limit of this interseismic interplate seismicity seems to be controlled primarily by the overlying-plate thickness and coherency, which in turn is governed by the erosional processes and fluid release and escape at temperatures lower than *100 to 120° C along the plate boundary. The downdip limit of the stick–slip behaviour collocates with relative low temperatures of *150 to 200° C, suggesting that it is controlled by serpentinization of the mantle wedge. The distribution of the interseismic interplate seismicity is locally modified by the presence of subducted seamounts at different depths. Unlike in northern Costa Rica, rupture of large earthquakes in the last two decades seems to coincide with the area defined by the interseismic interplate seismicity.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00531-013-0955-8
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Seismic constraints on the crustal structure of Cocos Ridge off the coast of Costa Rica (2002)
    Schweizerbart
    In:  Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 225 (1). pp. 25-37.
    Details
    Publication Date: 2020-08-07
    Description: 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.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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