La Falla del Norte de Tabarca: el límite geológico entre las bahías de Alicante y Santa Pola (SE España)
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Abstract
La Falla del Norte de Tabarca, de traza E-O, es el límite norte de la cresta
anticlinal de Tabarca, separándola del sinclinal de Alicante. Es interpretada como
de salto en dirección. Hunde el bloque norte y levanta el sur permitiendo aflorar
el basamento, formado por la Zona Interna bética. No parece activa en la actualidad por estar fosilizada por una unidad litosísmica de edad comprendida entre
el Younger Dryas y la actualidad. En los perfiles sísmicos estudiados se observan
dos unidades litosísmicas interpretadas como Messiniense inferior y Messiniense
superior separadas por la discontinuidad intramessiniense. El reflector doble
que separa las unidades litosísmicas plegadas de las horizontales se ha interpretado como un cambio en la litificación
The North Tabarca Fault, W-E striking, is the northern limit of the Tabarca anticline crest, separating it from the Alicante syncline. It is interpreted as a strike-slip fault that downthrown the northern block and, to the south, upthrown the basement formed by the Betic Internal Zone. It does not seem active at present because is fossilized by a lithoseismic unit dated between the Younger Dryas and Today. Two lithoseismic units interpreted as lower Messinian and upper Messinian separated by the intramessinian discontinuity are observed in the studied seismic profiles. The double reflector that separates the folded lithoseismic units from the horizontal ones has been interpreted as a lithification change
The North Tabarca Fault, W-E striking, is the northern limit of the Tabarca anticline crest, separating it from the Alicante syncline. It is interpreted as a strike-slip fault that downthrown the northern block and, to the south, upthrown the basement formed by the Betic Internal Zone. It does not seem active at present because is fossilized by a lithoseismic unit dated between the Younger Dryas and Today. Two lithoseismic units interpreted as lower Messinian and upper Messinian separated by the intramessinian discontinuity are observed in the studied seismic profiles. The double reflector that separates the folded lithoseismic units from the horizontal ones has been interpreted as a lithification change







