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Aportaciones de la prospección geofísica al estudio del subsuelo del Bergueda y Solsones (pre-pirineo catalán, N. E. De la Península Ibérica)

1992; University of Barcelona; Volume: 27; Issue: 1 Linguagem: Inglês

2173-6537

Lluís Rivero Marginedas, A. Casas,

Archaeological and Geological Studies

A combined gravity and seismic study of a sector located in the limit of the Pre-Pyrenees and Catalonian Central Depresion structural units is presented. Two sets of geophysical data are used: gravity and seismic reflection, which are complementary since one detects subhorizontal limits while the other serves to locate heterogeneous density masses. To emphasize the local gravity anomalies, a residual map was obtained by removing the regional field, which is best represented by a second order trend surface. The most prominent features of this map are the gravity lows aligned over anticline structures. Gravity modelling constrained by seismic reflexion data reveals the existence of a low density plastic marls tectonically acumulated on the nucleus of the anticlines.