Trace element and isotopic variations from Mt. Vulture to Campanian volcanoes; constraints for slab detachment and mantle inflow beneath southern Italy

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doi: 10.1007/s00410-006-0062-y
Authors:De Astis, G.; Kempton, P. D.; Peccerillo, A.; Wu, T. W.
Author Affiliations:Primary:
INGV, Osservatorio Vesuviano, Naples, Italy
Other:
Natural Environment Research Council, United Kingdom
Universita di Perugia, Italy
University of Western Ontario, Canada
Volume Title:Contributions to Mineralogy and Petrology
Source:Contributions to Mineralogy and Petrology, 151(3), p.331-351. Publisher: Springer International, Heidelberg - New York, International. ISSN: 0010-7999
Publication Date:2006
Note:In English. Includes appendices. 112 refs.; illus., incl. 1 table, sketch map
Summary:Sr-Nd-Pb isotopic ratios and trace element data for volcanic mafic rocks outcropping along an E-W transect in S Italy, from Mt. Vulture to Neapolitan volcanoes, are reported. The variation of LILE/HFSE, HFSE/HFSE and radiogenic isotopes along this transect indicates that all of these volcanoes contain both intra-plate and subduction-related signatures, with the former decreasing from Mt. Vulture to Campanian volcanoes. Data are also reported for the Palaeocene alkaline rocks from Pietre Nere (Apulia foreland), which show isotopic ratios mostly overlapping the values for Mediterranean intra-plate volcanoes as well as the Eocene-Oligocene alkaline mafic lavas from the N Adria plate. Pietre Nere provides evidence for an OIB mantle composition of FOZO-type, free of subduction influences, that is present beneath the Adria plate (Africa) before its collision with Europe. After this collision, and formation of the S Apennines, westward inflow of mantle from the Adria plate to the Campanian area occurred, as a consequence of slab break off. Interaction of subduction components with inflowing Adria mantle generated hybrid sources beneath the Vulture-Campania area, which can explain the compositional features of both Mt. Vulture and the Campanian mafic rocks. Mafic magmas from these volcanoes represent variable degrees of mixing between different mantle components. [G.L.B.]
Sections:Geochemistry
Subsections:Igneous rocks; Volcanology
Subjects:Adriatic Plate; Alkaline earth metals; Basement; Cenozoic; Chemical composition; Detachment faults; Faults; Geochemistry; Geodynamics; Island arcs; Isotope ratios; Isotopes; Lead; Lithophile elements; Magma contamination; Magmas; Mantle; Metals; Nd-144/Nd-143; Neodymium; Pb-206/Pb-204; Petrography; Plate tectonics; Provenance; Radioactive isotopes; Rare earths; Slabs; Sr-87/Sr-86; Stable isotopes; Strontium; Subduction zones; Tertiary; Trace elements; Volcanism; Volcanoes; Apulia Italy; Campania Italy; Europe; Italy; Phlegraean Fields; Southern Europe; Vesuvius; Vulture Mountain
Coordinates:N400000 N413000 E0154500 E0134500
Abstract Numbers:06M/1377
Record ID:2007043686
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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