Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4723
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dc.contributor.authorallBilli, A.; Dipartimento di Scienze Geologiche, Università “Roma Tre”, Rome, Italy-
dc.contributor.authorallTiberti, M. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia-
dc.date.accessioned2008-12-15T07:44:34Z-
dc.date.available2008-12-15T07:44:34Z-
dc.date.issued2008-
dc.identifier.urihttp://hdl.handle.net/2122/4723-
dc.description.abstractIn central Italy, geometry, kinematics, and tectonic evolution of the late Neogene Umbrian Arc, which is one of the main thrusts of the northern Apennines, have long been studied. Documented evidence for orogenic curvature includes vertical-axis rotations along both limbs of the arc and a positive orocline test along the entire arc. The curvature’s cause is, however, still unexplained. In this work, we focused our attention on the southern portion of the Umbrian Arc, the so-called Olevano-Antrodoco thrust. We analyze, in particular, gravity and seismic reflection data and consider available paleomagnetic, stratigraphic, structural, and topographic evidence from the central Apennines to infer spatial extent, attitude, and surface effects of a mid-crustal anticlinorium imaged in the CROP-11 deep seismic profile. The anticlinorium has horizontal dimensions of about 50 by 30 km and is located right beneath the Olevano-Antrodoco thrust. Stratigraphic, structural, and topographic evidence suggests that the anticlinorium produced a surface uplift during its growth in early Pliocene times. We propose an evolutionary model in which, during late Neogene time, the Olevano-Antrodoco thrust developed in an out-of-sequence fashion and underwent about 16° of clockwise rotation when the thrust ran into and was then raised and folded by the growing anticlinorium (late Messinian-early Pliocene time). This new model suggests a causal link between mid-crustal folding and surficial orogenic curvature that is consistent with several available data sets from the northern-central Apennines; more evidence is, however, needed to fully test hypothesis. Additionally, due to the occurrence of mid-crustal basement-involved thrusts in other orogens, this model may be a viable mechanism for arc formation elsewhere.en
dc.language.isoengen
dc.relation.ispartofGeological Society of America Bulletinen
dc.subjectoroclinesen
dc.subjectAppeninesen
dc.subjectfold and thrust beltsen
dc.subjectgravity anomaliesen
dc.subjectseismic reflection profilesen
dc.titlePossible causes of arc development in the Apennines, central Italyen
dc.title.alternativeArc development in the Apenninesen
dc.typemanuscript-
dc.description.statusSubmitteden
dc.type.QualityControlPeer-revieweden
dc.subject.INGV04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processesen
dc.subject.INGV04. Solid Earth::04.03. Geodesy::04.03.04. Gravity anomaliesen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.09. Structural geologyen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonicsen
dc.description.obiettivoSpecifico3.3. Geodinamica e struttura dell'interno della Terraen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorBilli, A.-
dc.contributor.authorTiberti, M. M.-
dc.contributor.departmentDipartimento di Scienze Geologiche, Università “Roma Tre”, Rome, Italy-
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia-
item.grantfulltextopen-
item.fulltextWith Fulltext-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.author.deptDipartimento di Scienze Geologiche, Università “Roma Tre”, Largo S.L. Murialdo 1, 00146, Roma, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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