Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/3937| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Speranza, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.authorall | Maniscalco, R.; Dipartimento di Scienze Geologiche, Università di Catania, Corso Italia 55, 95129 Catania, Italy | en |
| dc.contributor.authorall | Grasso, M.; Dipartimento di Scienze Geologiche, Università di Catania, Corso Italia 55, 95129 Catania, Italy | en |
| dc.date.accessioned | 2008-07-08T06:46:40Z | en |
| dc.date.available | 2008-07-08T06:46:40Z | en |
| dc.date.issued | 2003 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/3937 | en |
| dc.description.abstract | New palaeomagnetic data from upper Triassic to Pliocene sediments reveal that in eastern Sicily a major 70° clockwise (CW) rotation took place between Oligocene and late Tortonian time, followed by a further 30° CW rotation. Results from central Sicily are less coherent. They show 44–83° post-Oligocene CW rotation, local 14° post-late Tortonian counterclockwise (CCW) rotation, and 25° post-mid-Pliocene CW rotation. We interpret the larger CW rotation observed in eastern Sicily as related to a more internal palaeogeographical position with respect to central Sicily. Our results complement pre-existing data from the northwestern Sicily carbonates, and indicate that all the internal carbonate nappes coherently rotated by c. 100° CW during tectonic emplacement, implying a west-to-east increase of shortening in the Sicilian Maghrebian belt. In Sicily, compressive deformation started during the Langhian, i.e. just after the deposition of the upper Oligocene–upper Burdigalian Numidian Flysch turbidites. Therefore the age of the older 70° palaeomagnetic rotation (synchronous to the thrusting) is constrained to occur between the Langhian and late Tortonian. Furthermore, by considering a maximum possible rotation rate of 20° Ma 1, we infer that CW rotation started in Sicily in Langhian–Serravallian times, between 15–16 and 11–12 Ma ago. The 100° CW rotation observed in pre-orogenic strata from the whole of Sicily is mirrored by 80° orogen-scale CCW rotations characterizing the internal southern Apennines. Palaeomagnetism therefore shows that during orogenesis, the southern Apennines and the Sicilian Maghrebides rotated in a 'saloon-door' fashion, synchronous to back-arc spreading of the southern Tyrrhenian Sea. Consequently, our palaeomagnetic data suggest that the southern Tyrrhenian back-arc basin started to spread during Langhian–Serravallian times (from 15–16 to 11–12 Ma), significantly earlier than the late Tortonian age (8 Ma) suggested so far by oceanic drilling data. | en |
| dc.language.iso | English | en |
| dc.publisher.name | Geological Society of London | en |
| dc.relation.ispartof | Journal of the Geological Society, London | en |
| dc.relation.ispartofseries | 2 / 160 (2003) | en |
| dc.subject | Sicily | en |
| dc.subject | Tyrrhenian Sea | en |
| dc.subject | Maghrebides | en |
| dc.subject | paleomagnetism | en |
| dc.subject | plate rotation | en |
| dc.title | Pattern of orogenic rotations in central–eastern Sicily: implications for the timing of spreading in the Tyrrhenian Sea | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 183-195 | en |
| dc.subject.INGV | 04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism | en |
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| dc.description.obiettivoSpecifico | 2.2. Laboratorio di paleomagnetismo | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | reserved | en |
| dc.contributor.author | Speranza, F. | en |
| dc.contributor.author | Maniscalco, R. | en |
| dc.contributor.author | Grasso, M. | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.department | Dipartimento di Scienze Geologiche, Università di Catania, Corso Italia 55, 95129 Catania, Italy | en |
| dc.contributor.department | Dipartimento di Scienze Geologiche, Università di Catania, Corso Italia 55, 95129 Catania, Italy | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | restricted | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.dept | Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Sezione Scienze della Terra – Università di Catania, Corso Italia 57, 95129, Catania, Italy | - |
| crisitem.author.dept | Dipartimento di Scienze Geologiche, Università di Catania, Corso Italia 55, 95129 Catania, Italy | - |
| crisitem.author.orcid | 0000-0001-5492-8670 | - |
| crisitem.author.orcid | 0000-0003-1026-044X | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
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