Fast Episodes of West-Mediterranean-Tyrrhenian Oceanic Opening and Revisited Relations with Tectonic Setting.

ABSTRACT: Extension and calc-alkaline volcanism of the submerged orogen of alpine age (OAA) initiated in Early Oligocene (~33/32 Ma) and reached the stage of oceanic opening in Early-Miocene (Burdigalian), Late-Miocene and Late-Pliocene. In the Burdigalian (~20-16 Ma) period of widespread volcanism of calcalkaline type on the margins of oceanic domain, seafloor spreading originated the deep basins of north Algeria (western part of OAA) and Sardinia/Provence (European margin). Conversely, when conjugate margins' volcanism has been absent or scarce seafloor spreading formed the plains Vavilov (7.5-6.3 Ma) and Marsili (1.87-1.67 Ma) within OAA eastern part (Tyrrhenian Sea). The contrast between occurrence and lack of margin's igneous activity probably implies the diversity of the geotectonic setting at

SUBMITTER: Savelli C 

PROVIDER: S-EPMC4585736 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature