El díapirismo salino y la discordancia de Minateda (Prebético, SE de España)

• W. Martínez del Olmo ^[1] ; J. Suárez Alba ^[1]
  1. [1] RepsolYpf
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 6, 2, 2004 (Ejemplar dedicado a: IV Congreso Geológico de España), págs. 91-94
• Idioma: español
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• Resumen

  • The intra-miocene angular unconformity at Minateda railway station has been interpreted for a long time as caused by a compressive tectonicaI phase of regional scale, separating two Miocene units, the oldest synorogenic and the latest postorogenic. A review of the lithostratigraphy and structure of the marine Miocene of a large area of the Prebetic Zone allows us to separate, at least, four depositional sequences spanning from Aquitanian to upper Tortonian in age. The analysis of their internal relationships, as well as with the Mesozoic substratum, indicates to the following: a) The four depositional sequences are arranged in a transgressive megacycle, synsedimentary (coeval) with both, a continuous and long compressive tectonic phase, and a diapiric deformation phase of a Triassic mother salt, introducing numerous structural and sedimentary pattern anomalies of local extent, b) The angular unconformity at Minateda is thus a local and singular anomaly, induced by diapiric processes rather than compressive tectonics.