Evaluation of pinnacle reef distribution at shallow subsurface using integrated geophysical methods: a case study from the Upper Kimmerdigian (Spain)

Pueyo Anchuela, Óscar (Universidad de Zaragoza) ; San Miguel, Galo ; Bádenas, Beatriz (Universidad de Zaragoza) ; Aurell, Marcos (Universidad de Zaragoza)

Resumen: The well exposed outcrops of the upper Kimmeridgian shallow-marine carbonates at Jabaloyas (Iberian Chain, NE Spain) permit the evaluation of geophysical methods for the identification of sedimentary facies. Direct measurement of magnetic susceptibility in facies and detailed grids of magnetometry, electromagnetic multifrequency and ground-penetrating radar (50e500 MHz antennas) have been performed in two study areas where the upper Kimmeridgian rocks are nearly horizontal. Magnetometry indicates negative anomalies in residual magnetic field and vertical magnetic gradient related to reef pinnacles and faults. Electromagnetic data reveal that positive anomalies of apparent conductivity correlate with non-reefal facies. The areal distribution of magnetometry and EM data does not permit the unequivocal identification of pinnacles and faults at the studied area. By contrast, ground penetrating radar profiles and maps of relative reflectivity in two way travel time slices are useful for the identifi- cation of faults (hyperbolic anomalies) and reefal and non-reefal facies (radar facies A and B, respec- tively). The integration of geophysical data, mainly ground penetrating radar, has permitted the 3D reconstruction of reef pinnacles and its tectonic framework.

Idioma: Inglés

DOI: 10.1016/j.marpetgeo.2016.05.027

Año: 2016

Publicado en: MARINE AND PETROLEUM GEOLOGY 76 (2016), 329-343
ISSN: 0264-8172

Factor impacto JCR: 2.888 (2016)

Categ. JCR: GEOSCIENCES, MULTIDISCIPLINARY rank: 43 / 188 = 0.229 (2016) - Q1 - T1

Factor impacto SCIMAGO: 1.597 - Economic Geology (Q1) - Geology (Q1) - Stratigraphy (Q1) - Oceanography (Q1) - Geophysics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/CGL2014-53548
Financiación: info:eu-repo/grantAgreement/ES/UZ/E27
Financiación: info:eu-repo/grantAgreement/ES/UZ/IUCA-H54

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Geodinámica Interna (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Estratigrafía (Dpto. Ciencias de la Tierra)