A new limit for the NW Río de la Plata Craton Border at about 24ºS (Argentina) detected by Magnetotellurics
Old South American structures constitute a puzzle where the Río de la Plata craton is the most important clue in the assembly of SW Gondwana. The present study was performed to improve the knowledge resulting from all the previous magnetotelluric (MT) studies focused particularly on characterizing t...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:138612 |
| Acceso en línea: | https://ddd.uab.cat/record/138612 https://dx.doi.org/urn:doi:10.1344/GeologicaActa2015.13.3.6 |
| Access Level: | acceso abierto |
| Palabra clave: | Magnetotelluric Río de plata craton North argentina Formosa |
| Sumario: | Old South American structures constitute a puzzle where the Río de la Plata craton is the most important clue in the assembly of SW Gondwana. The present study was performed to improve the knowledge resulting from all the previous magnetotelluric (MT) studies focused particularly on characterizing the western border of the Rio de la Plata Craton. MT data were acquired along an approximately NW-SE 750 km profile at about 24ºS, from the Sub Andean Ranges in the province of Salta (NW) to the boundary Formosa Province frontier (SE) next to Paraguay River. Distortion and structure dimensionality analysis indicates that MT responses are two-dimensional with a NS strike orientation, consistent with the regional geological strike. A 2D inversion of the data provided a model showing a sharp lateral discontinuity, possibly associated with cratonic structures. The high resistivity (. |
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