RT Journal Article
T1 Origin of the Permian-Triassic Iberian Basin, central-eastern Spain
A1 Arche, Alfredo
A1 López Gómez, José
AB The Iberian Basin was an intracratonic rift basin in central-eastern Spain developed since Early Permian times. Thebasin boundary faults were normal, listric faults controlling an asymmetric extension propagating northeast with time.Hercynian or older lineaments controlled the orientation of the Iberian Basin and extension was accommodatedbasically in the hanging wall block by the formation of secondary grabens and a central high. The basin was related withthe coeval Ebro, Catalan and Cuenca-Mancha Basins and their connections are discussed.Subsidence curves show that the Early Permian-Early Jurassic period of extension can be subdivided into three riftingepisodes and a flexural one. Extension factor increases from 1.17 in the northwest to 1.29 near the Mediterranean coast.The increasing extension rate was accommodated by transfer faults trending NNE-SSW, more important in the Levantearea. The rift evolution is intermittent and seems to reflect distinct stress fields.The collapse of the late Hercynian orogen and related increased heat flux, extension and rifting is the most probableorigin of the Iberian Basin and related basins. The origin of the Catalan and the Valencia-Prebetic Basins is related to thesouthwards migration of the Hesse-Burgundy Rift along the eastern margin of the Iberian Microplate.
PB Elsevier Science B.V
SN 0040-1951
YR 1996
FD 1996
LK https://hdl.handle.net/20.500.14352/57799
UL https://hdl.handle.net/20.500.14352/57799
LA eng
DS Docta Complutense
RD 6 may 2024