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Cenozoic volcanism in the Mediterranean Area (2007)

Beccaluva, Luigi ; Geological Society of America

Boulder, Colo : Geological Society of America

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Schlagwort(e): Volcanism ; Geology, Stratigraphic Cenozoic ; Geodynamics ; Subduction zones ; Tyrrhenian Sea ; Aufsatzsammlung ; Mittelmeerraum ; Subduktion ; Vulkanismus ; Geologie ; Känozoikum ; Mittelmeer ; Magmatismus

Materialart: Buch

Seiten: V, 358 S. , Ill., graph. Darst., Kt.

ISBN: 9780813724188

Serie: Special paper 418

URL: http://www.loc.gov/catdir/toc/fy0801/2007298655.html

DDC: 551.2109182/2

RVK:

RO 10256

Sprache: Deutsch

Anmerkung: Transition from subduction-related to intraplate Neogene magmatism in the Western Anotolia and Aegean area /S. Agostini ... [et al.] --Neogene backarc volcanism of the Aegean /G. Pe-Piper and D.J.W. Piper --Petrology and volcanology of Kimolos and Polyegos volcanoes within the context of the South Aegean arc, Greece /L. Francalanci, G.E. Vougioukalakis, and M. Fytikas --Genesis of the Neogene to Quaternary volcanism in the Carpathian-Pannonian region /S. Harangi and L. Lenkey --Paleogene, early Miocene igneous rocks and geodynamics of the Alpine-Carpathian-Pannonian-Dinaric region /I Kovács ... [et al.] --Review of petrogenesis of Mediterranean Tertiary lamproites /D. Prelević, S. F. Foley, and V. Cvetković --Intraplate lithospheric and sublithospheric components in the Adriatic domain /L. Beccaluva ... [et al.] --Slab disruption, mantle circulation, and the opening of the Tyrrhenian basins /C. Faccenna ... [et al.] --Chemical and isotopic composition (Os, Pb, Nd, and Sr) of Neogene to Quaternary calc-alkalic, shoshonitic, and ultrapotassic mafic rocks from the Italian peninsula /S. Conticelli ... [et al.] --Components and processes in the magma genesis of the Phlegrean Volcanic District, southern Italy /M. D'Antonio ... [et al.] --Geochemical features and geodynamic significance of the southern Tyrrhenian backarc basin /T. Trua, G. Serri, and M.P. Marani --West-east geochemical and isotopic traverse along the volcanism of the Aeolian Island arc, southern Tyrrhenian Sea, Italy /L. Francalanci --Mount Etna pyroxene as tracer of petrogenetic processes and dynamics of the feeding system /P Armienti --Geochemical peculiarity of Phio-Quaternary volcanic rocks of Sardinia in the circum-Mediterranean area /M. Lustrino, L. Melluso, and V. Morra --Cenozoic evolution of the Alboran domain /M. Doblas, J. López-Ruiz, and J.-M. Cebriá --Cenozoic alkaline volcanism of the Atakor massif, Hoggar, Algeria /A. Azzouni-Sekkal ... [et al.]

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Magma generation and crustal accretion as evidenced by supra-subduction ophiolites of the Albanide–Hellenide Subpelagonian zone (2005)

Beccaluva, Luigi ; Coltorti, Massimo ; Saccani, Emilio ; [weitere]

Melbourne, Australia : Blackwell Science Pty

The @island arc 14 (2005), S. 0

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ISSN: 1440-1738

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Geologie und Paläontologie

Notizen: Abstract Ophiolites of the Mirdita–Subpelagonian zone form a nearly continuous belt in the Albanide–Hellenide orogen, including mid-ocean ridge basalt (MORB) associations in the western Mirdita sector and supra-subduction zone (SSZ) complexes, with prevalent island arc tholeiitic (IAT) and minor boninitic affinities in the eastern part of the belt (i.e. eastern Mirdita, Pindos, Vourinos). In addition, basalts with geochemical features intermediate between MORB and IAT (MORB/IAT) are found in the central Mirdita and in the Aspropotamos sequence (Pindos). These basalts alternate with pure MORB and are cut by boninitic dykes. The distinctive compositional characteristics of the mafic magmas parental to the different ophiolitic suites can be accounted for by partial melting of mantle sources progressively depleted by melt extractions. Partial melting processes (10–20%) of lherzolitic sources generated pure MORB, leaving clinopyroxene-poor lherzolite as a residuum. Approximately 10% water-assisted partial melting of this latter source, in an SSZ setting, may in turn generate basalts with MORB/IAT intermediate characteristics, whereas IAT basalts and boninites may have been derived from 10–20% and 30% partial melting, respectively, of the same source variably enriched by subduction-derived fluids. In addition, boninites may also have been derived by comparatively lower degrees of hydrated partial melting of more refractory harzburgitic sources. A generalized petrologic model based on mass balance calculations between bulk rock and mineral compositions, indicate that most of the intrusives (from ultramafic cumulates to gabbronorites and plagiogranites), as well as sheeted dykes and volcanics (from basalts to rhyodacites) forming the bulk crustal section of the SSZ ophiolites, may be accounted for by shallow fractional crystallization from low-Ti picritic parental magmas very similar in composition to IAT picrites from Pacific intraoceanic arcs. The most appropriate tectono-magmatic model for the generation of the SSZ Tethyan ophiolites implies low velocity plate-convergence of the intraoceanic subduction and generation of a nascent arc with IAT affinity and progressive slab roll-back, mantle diapirism and extension from the arc axis to the forearc region, with generation of MORB/IAT intermediate basalts and boninitic magmas.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1440-1738.2005.00483.x

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