Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10228
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dc.contributor.authorallManuella, F. C.en
dc.contributor.authorallScribano, V.; University of Cataniaen
dc.contributor.authorallCarbone, S.; University of Cataniaen
dc.contributor.authorallBrancato, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.date.accessioned2016-02-23T13:05:58Zen
dc.date.available2016-02-23T13:05:58Zen
dc.date.issued2015-07en
dc.identifier.urihttp://hdl.handle.net/2122/10228en
dc.description.abstractThe extensive study of a great number of deep-seated xenoliths from Tortonian tuff-breccia pipes in the Hyblean area (Sicily) revealed the following fundamental evidence: (1) typical continental crust rocks are completely absent in the entire xenolith suite; (2) mantle ultramafics are more abundant than gabbroids; (3) sheared oxide–gabbros, closely resembling those from oceanic fracture zones, are relatively common; (4) secondary mineral assemblages, compatible with alteration processes in serpentinite-hosted hydrothermal systems, occur both in peridotites and gabbros. Among the products of this hydrothermal activity, organic compounds, having abiotic origin via Fischer–Tropsch synthesis, occur in some hydrothermally altered gabbro and ultramafic xenoliths, as well as in hydrothermal clays. Moreover, the U–Pb dating of hydrothermal zircon grains, hosted in a xenolith of metasomatized tectonic breccia, indicated an Early–Middle Triassic age of the fossil hydrothermal system. Another line of evidence for the oceanic nature of the Hyblean–Pelagian basement is the complete absence of continental crust lithologies (granites, felsic metaigneous, and metasedimentary rocks) in outcrops and in boreholes, and the oceanic affinity of the Tertiary volcanic rocks from the Hyblean Plateau and the Sicily Channel (Pantelleria and Linosa Islands), which lack of any geochemical signature for continental crust contamination. A reappraisal of existing geophysical data pointed out that serpentinites form the dominant lithologies in the lithospheric basement of the Hyblean–Pelagian area down to a mean depth of 19 km, which represents the regional Moho considered as the serpentinization front, marking the transition from serpentinites to unaltered peridotites. On these grounds, we confirm that Hyblean xenoliths contain mineralogical, compositional, and textural evidence for tectonic, magmatic, and hydrothermal processes indicating the existence of fossil oceanic core complexes, in the geotectonic framework of the Paleo–Mesozoic, ultra-slow spreading, Ionian–Tethys Ocean forming the present Ionian–Hyblean–Pelagian domain.en
dc.language.isoEnglishen
dc.publisher.nameSpringer Verlag New York Incen
dc.relation.ispartofInternational journal of earth sciencesen
dc.relation.ispartofseries5/104 (2015)en
dc.subjectSerpentinitesen
dc.subjectXenolithsen
dc.subjectPermian Tethysen
dc.subjectHyblean Plateauen
dc.titleThe Hyblean xenolith suite (Sicily): an unexpected legacy of the Ionian–Tethys realmen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber1337-1336en
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.05. Mineralogy and petrologyen
dc.identifier.doi10.1007/s00531-015-1151-9en
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dc.description.obiettivoSpecifico1T. Geodinamica e interno della Terraen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn1437-3254en
dc.relation.eissn1437-3262en
dc.contributor.authorManuella, F. C.en
dc.contributor.authorScribano, V.en
dc.contributor.authorCarbone, S.en
dc.contributor.authorBrancato, A.en
dc.contributor.departmentUniversity of Cataniaen
dc.contributor.departmentUniversity of Cataniaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptDipartimento di Scienze Biologiche, Geologiche e Ambientali - Università di Catania-
crisitem.author.deptUNICT-
crisitem.author.deptDipartimento di Scienze Biologiche, Geologiche e Ambientali - Università di Catania-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.orcid0000-0002-0810-5355-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
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