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| Main Author: | |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universitat de Barcelona
2016
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| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=50547614005 https://www.redalyc.org/journal/505/50547614005/ https://www.redalyc.org/journal/505/50547614005/html/ https://www.redalyc.org/journal/505/50547614005/50547614005.epub https://www.redalyc.org/journal/505/50547614005/movil |
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Table of Contents:
- New constraints on the origin of the ophiolitic rocks within sin-orogenic turbiditic sequences at Cilento region (southern Italy) F.C. Mazzeo P. De Vita M. Aulinas I. Arienzo G. Cirillo R.S. Iovine D. Sparice Ciencias de la Tierra Mor B type rocks Cilento region Mount Centaurino Southern apennine 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. 2016 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50547614005 https://www.redalyc.org/journal/505/50547614005/ https://www.redalyc.org/journal/505/50547614005/html/ https://www.redalyc.org/journal/505/50547614005/50547614005.epub https://www.redalyc.org/journal/505/50547614005/movil en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.3 Vol.14