SUBSIDENZA TETTONICA SUL MARGINE TIRRENICO OCCIDENTALE

Abstract

The stratigraphy of the ODP wells drilled in the Tyr­rhenain basin, and on its western margin in particular, has been backstripped to derive tectonic subsidence curves. Be­sides the rift related subsidence (upper Miocene - mid-lower Pliocene) on the margin, a recent episode of subsidence (about 2 Ma) has been documented basinwide. Such a recent epi­sode does not fit easily into subsidence models applied to "classic" passive margins. Given the backarc setting of the Tyrrhenian basin, it is likely that processes related to sub­duction contribute to shape the observed tectonic subsidence.