Distinguishing the effect of diapir growth on magnetic fabrics of syn-diapiric overburden rocks: Basque-Cantabrian basin, Northern Spain
| Autor: | Elisabet Beamud, Eduard Roca, Eloi Carola, Ruth Soto, Ylenia Almar |
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| Přispěvatelé: | Ministerio de Economía, Industria y Competitividad (España), Ministerio de Economía y Competitividad (España), Universitat de Barcelona |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
anisotropía magnética
Paleomagnetism sedimento 010504 meteorology & atmospheric sciences Geochemistry Geology Structural basin Diapir 010502 geochemistry & geophysics Serralada Cantàbrica 01 natural sciences Cantabria diapiro País Vacso Paleomagnetisme Overburden análisis cuenca Cantabrian Mountains Geomorphology 0105 earth and related environmental sciences |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Digital.CSIC. Repositorio Institucional del CSIC Dipòsit Digital de la UB Universidad de Barcelona |
| Popis: | An analysis of Anisotropy of Magnetic Susceptibility was done on Aptian–Albian sediments from the Basque–Cantabrian basin. Samples were collected from 39 sites in the halokinetic sequences of the Bakio, Bermeo, Guernica and Mungia diapirs; 28 sites were sampled close to diapirs, and 11 sites were far from the diapir edges. The magnetic foliation is parallel to bedding, suggesting it reflects depositional and compaction processes, whereas the orientation of magnetic lineation varies. Far from the diapir edges, the magnetic lineation is interpreted as being related to the regional Pyrenean compression. Close to diapir edges, the observed behaviour shows that diapirs, predominantly formed by rigid ophites, have acted as buttresses, with shadow areas at their northern faces being protected from the Pyrenean compression. The high sensitivity of AMS makes it a very useful tool to distinguish deformation in halokinetic sequences related to diapir growth from that related to subsequent compression. Unidad de Zaragoza, Instituto Geológico y Minero de España, España Laboratori de Paleomagnetisme, Institut de Ciències de la Terra Jaume Almera, España GEOMODELS Institut de Recerca, Universitat de Barcelona, España |
| Databáze: | OpenAIRE |
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