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http://hdl.handle.net/2122/14763
DC Field | Value | Language |
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dc.date.accessioned | 2021-06-15T08:41:16Z | - |
dc.date.available | 2021-06-15T08:41:16Z | - |
dc.date.issued | 2021-05 | - |
dc.identifier.uri | http://hdl.handle.net/2122/14763 | - |
dc.description.abstract | The E-vergent Northern Apennines formed by Oligocene-Miocene convergence and westward subduction of Adria beneath Europe. Extension ensued in the Mid-Late Miocene reflecting lower plate roll-back and causing opening of the back-arc Northern Tyrrhenian Sea. Post-orogenic extension is commonly advocated as the main driver of the exhumation of the belt's inner domain highpressure/ low-temperature (HP-LT) rock units. The Acquadolce Subunit of the Eastern Elba nappe stack contains HP-LT rocks recording peak blueschist conditions of 1.5–1.8 GPa at 320°C–370°C loosely dated to the Oligocene-Early Miocene. It is sandwiched by two Late Miocene, out-of-sequence top-to-the E thrusts between Jurassic LP serpentinites on top and HT–LP contact metamorphosed marbles at its base. We document widespread W-verging ductile asymmetries within the Acquadolce Subunit, which correspond to top-to-the W extensional shearing for the nappe stack current orientation. This allowed for early syn-orogenic exhumation from blueschist- to greenschist-facies conditions, wherein coeval W-directed extension at the top of the exhuming units acted synchronously with E-directed thrusting at their base causing exhumation by extrusion in an overall contractional setting. The basal, E-vergent thrusting is, however, challenging to document as the wedge has since been reworked by Late Miocene, E-verging compressive tectonics, contact metamorphism, and later extension, obliterating much of the evidence supporting exhumation by extrusion during the early stages of wedge build-up. Syn-orogenic exhumation by extrusion from deep structural levels within the orogenic wedge is a viable mechanism to account for other exhumed HP-LT units in the inner part of the belt. | en_US |
dc.language.iso | English | en_US |
dc.publisher.name | Wiley Agu | en_US |
dc.relation.ispartof | Tectonics | en_US |
dc.relation.ispartofseries | 5/40 (2021) | en_US |
dc.subject | Syn-orogenic extrusion is proposed as a viable mechanism for the exhumation of HP-LT rock units of the Northern Apennines; • The Acquadolce Subunit of the Eastern Elba nappe stack was exhumed by upward extrusion within an actively shortening orogenic wedge; • Middle Miocene extension shaped the upper Northern Apennines orogenic wedge but did not contribute to the early exhumation of HP rocks. | en_US |
dc.title | Syn‐Orogenic Exhumation of High‐P Units by Upward Extrusion in an Accretionary Wedge: Insights From the Eastern Elba Nappe Stack (Northern Apennines, Italy) | en_US |
dc.type | article | en |
dc.description.status | Published | en_US |
dc.type.QualityControl | Peer-reviewed | en_US |
dc.description.pagenumber | e2020TC006348 | en_US |
dc.subject.INGV | 04. Solid Earth | en_US |
dc.identifier.doi | 10.1029/2020TC006348 | en_US |
dc.description.obiettivoSpecifico | 1T. Struttura della Terra | en_US |
dc.description.journalType | JCR Journal | en_US |
dc.relation.issn | 0278-7407 | en_US |
dc.contributor.author | Ryan, Eric James | - |
dc.contributor.author | Papeschi, Samuele | - |
dc.contributor.author | Viola, Giulio | - |
dc.contributor.author | Musumeci, Giovanni | - |
dc.contributor.author | Mazzarini, Francesco | - |
dc.contributor.author | Torgersen, Espen | - |
dc.contributor.author | Sørensen, Bjørn Eske | - |
dc.contributor.author | Ganerød, Morgan | - |
dc.contributor.department | Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Trondheim, Norway, | en_US |
dc.contributor.department | Kochi Institute for Core Sample Research, Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), JAMSTEC, Kanagawa, Japan | en_US |
dc.contributor.department | Dipartimento di Scienze Biologiche, Geologiche ed Ambientali, Università degli Studi di Bologna, Bologna, Italy | en_US |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | en_US |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | en_US |
dc.contributor.department | Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Trondheim, Norway; Geological Survey of Norway, Trondheim, Norway | en_US |
dc.contributor.department | Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Trondheim, Norway | en_US |
dc.contributor.department | Geological Survey of Norway, Trondheim, Norway | en_US |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Trondheim, Norway | - |
crisitem.author.dept | Dipartimento di Scienze della Terra, Firenze University, Firenze, Italy | - |
crisitem.author.dept | Department of Biological, Geological and Environmental Sciences, Università degli Studi di Bologna, Bologna, Italy | - |
crisitem.author.dept | Università di Pisa | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | - |
crisitem.author.dept | Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Trondheim, Norway; Geological Survey of Norway, Trondheim, Norway | - |
crisitem.author.dept | Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Trondheim, Norway | - |
crisitem.author.dept | Geological Survey of Norway, Trondheim, Norway | - |
crisitem.author.orcid | 0000-0003-3827-4405 | - |
crisitem.author.orcid | 0000-0002-5774-7119 | - |
crisitem.author.orcid | 0000-0002-8383-3328 | - |
crisitem.author.orcid | 0000-0001-5343-4708 | - |
crisitem.author.orcid | 0000-0002-3864-6558 | - |
crisitem.author.orcid | 0000-0001-6076-1432 | - |
crisitem.author.orcid | 0000-0002-9647-1784 | - |
crisitem.author.orcid | 0000-0003-0051-4020 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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Ryan_et_al_Tectonics_2021.pdf | Open Access | 5.04 MB | Adobe PDF | View/Open |
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