Per citar aquest document: http://ddd.uab.cat/record/165468
New constraints on the origin of the ophiolitic rocks within sinorogenic turbiditic sequences at Cilento region (southern Italy)
Mazzeo, F. C. (Università degli Studi di Napoli Federico II. Dipartimento di Science della Terra, dell'Ambiente e delle Risorse)
Aulinas Juncà, Meritxell (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia Aplicada)
Arienzo, I. (Istituto Nazionale di Geofisica e Vulcanologia. Sezione di Napoli Osservatorio Vesuviano)
Cirillo, G. (Università degli Studi di Napoli Federico II. Dipartimento di Science della Terra, dell'Ambiente e delle Risorse)
Iovine, R.S. (Georg-August-Universität. Geowissenschaftliches Zentrum)
Sparice, D. (Università degli Studi di Napoli Federico II. Dipartimento di Science della Terra, dell'Ambiente e delle Risorse)
De Vita, P. (Università degli Studi di Napoli Federico II. Dipartimento di Science della Terra, dell'Ambiente e delle Risorse)

Data: 2016
Resum: Mafic igneous rocks (pillow lavas and gabbros) embedded as olistoliths within Miocene turbiditic sequences crop out in the Cilento area at the Mount Centaurino (Campania region, Southern Italy). The concentration of major oxides, as well as trace element ratios (Nb/Yb, Nb/Ta, Th/Nb) and the chondrite-normalized Rare Earth Elements (REE) patterns suggest a tholeiitic character with Mid Oceanic Ridge Basalts (MORB) affinity. The chemical composition of pillow lavas is consistent with magmas generated by 10% degrees of non-modal fractional partial melting, of a spinel-bearing MORB-type asthenospheric mantle. Regarding gabbros, the calculated composition of parental melts in equilibrium with the clinopyroxenes show a wide compositional range, and there are very different from the pillow basalts of the Mount Centaurino, suggesting that the clinopyroxenes might have derived from more evolved melts compared to those that produced the basalts. The origin of these olistoliths is not yet understood. Here we suggest that these rocks represent fragment of a dismantled accretionary wedge embedded during the deposition of the Cilento group sedimentary successions in a thrust top basin.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria. Creative Commons
Llengua: Anglès.
Document: article ; recerca ; publishedVersion
Matèria: Southern apennine ; Cilento region ; Mount centaurino ; Ophiolitic olistoliths ; Morb-type rocks
Publicat a: Geologica acta, Vol. 14 Núm. 3 (September 2016) , p. 299-314 (Articles) , ISSN 1696-5728

Adreça alternativa: http://www.raco.cat/index.php/GeologicaActa/article/view/312908
DOI: 10.1344/GeologicaActa2016.14.3.6


18 p, 2.6 MB

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 Registre creat el 2016-10-07, darrera modificació el 2016-11-02



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