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  Deep electrical resistivity structure of northwestern Costa Rica

Brasse, H., Kapinos, G., Mütschard, L., Alvarado, G. E., Worzewski, T., Jegen, M. (2009): Deep electrical resistivity structure of northwestern Costa Rica. - Geophysical Research Letters, 36, L02310.
https://doi.org/10.1029/2008GL036397

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Item Permalink: https://gfzpublic.gfz.de/pubman/item/item_43082 Version Permalink: https://gfzpublic.gfz.de/pubman/item/item_43082_4
Genre: Journal Article

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Brasse, H.1, Author
Kapinos, G., Author
Mütschard, L.1, Author
Alvarado, Gonzalez E.1, Author
Worzewski, T.1, Author
Jegen, M.1, Author
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1Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum, Potsdam, ou_44021              

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 Abstract: First long-period magnetotelluric investigations were conducted in early 2008 in northwestern Costa Rica, along a profile that extends from the coast of the Pacific Ocean, traverses the volcanic arc and ends currently at the Nicaraguan border. The aim of this study is to gain insight into the electrical resistivity structure and thus fluid distribution at the continental margin where the Cocos plate subducts beneath the Caribbean plate. Preliminary two-dimensional models map the only moderately resistive mafic/ultramafic complexes of the Nicoya Peninsula (resistivity of a few hundred Ωm), the conductive forearc and the backarc basins (several Ωm). Beneath the backarc basin the data image a poor conductor in the basement with a clear termination in the south, which may tentatively be interpreted as the Santa Elena Suture. The volcanic arc shows no pronounced anomaly at depth, but a moderate conductor underlies the backarc with a possible connection to the upper mantle. A conductor at deep-crustal levels in the forearc may reflect fluid release from the downgoing slab.

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Language(s): eng - English
 Dates: 2009
 Publication Status: Finally published
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2008GL036397
 Degree: -

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Title: Geophysical Research Letters
Source Genre: Journal, SCI, Scopus, ab 2023 oa
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Pages: - Volume / Issue: 36 Sequence Number: L02310 Start / End Page: - Identifier: CoNE: https://gfzpublic.gfz.de/cone/journals/resource/journals182