Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacada? (SE Turkey) (Articolo in rivista)

Type
Label
  • Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacada? (SE Turkey) (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jseaes.2011.11.016 (literal)
Alternative label
  • Lustrino M.(a,b), Keskin M.(c), Mattioli M.(d), Kavak O.(e) (2012)
    Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacada? (SE Turkey)
    in Journal of Asian earth sciences
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lustrino M.(a,b), Keskin M.(c), Mattioli M.(d), Kavak O.(e) (literal)
Pagina inizio
  • 120 (literal)
Pagina fine
  • 139 (literal)
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  • http://dx.doi.org/10.1016/j.jseaes.2011.11.016 (literal)
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  • 46 (literal)
Rivista
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  • 20 (literal)
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  • (a) Dipartimento di Scienze della Terra, Universit√† degli Studi di Roma La Sapienza, P.le A. Moro, 5, 00185 Roma, Italy (b) CNR - Istituto di Geologia Ambientale e Georisorse (IGAG), c/o Dipartimento di Scienze della Terra, Universit√† degli Studi di Roma La Sapienza, P.le A. Moro, 5, 00185 Roma, Italy (c) Department of Geological Engineering, Faculty of Engineering, Istanbul University, 34320 Avc?lar, Istanbul, Turkey (d) Dipartimento di Scienze della Terra, della Vita e dell'Ambiente, Universit√† degli Studi di Urbino 'Carlo Bo', Urbino, Italy (e) Department of Mining Engineering, Faculty of Engineering, Dicle University, Diyarbakir, Turkey (literal)
Titolo
  • Heterogeneous mantle sources feeding the volcanic activity of Mt. Karacada? (SE Turkey) (literal)
Abstract
  • The volcanic activity of Mt. Karacada? (SE Anatolia) is divided into three major stages: Siverek Stage (~11-2.7 Ma), Karacada? Stage (~1.9-1.0 Ma) and Ovaba? Stage (0.4-0.01 Ma). The magmas are mildly alkaline mafic rocks, mostly basanites, hawaiites and alkali basalts. Detailed geochemical investigation indicates a continuous variation of composition with time, with the oldest products (Siverek Stage) being characterized by average lowest HFSE (Ti, Hf, Zr, Nb, Ta), 143Nd/144Nd, Nb/U, Ta/Yb, Nb/Nb* and the highest ?Q, La/Nb, Ti/Nb, Zr/Nb, Ba/Nb, Th/Ta, K/La, and the youngest products (Ovaba? Stage) at the opposite end of the trend. The overall incompatible element content of the Karacada? volcanic rocks resembles closely average HIMU-OIB compositions, with the oldest samples deviating more strongly from typical compositions of \"anorogenic\" magmas. We interpret these geochemical variations with a process of partial melting of a chemically and mineralogically heterogeneous mantle source rather than with process of variable crustal contamination at shallow depths. During the first stages of mantle melting the volumes with lowest solidus temperature (e.g., the amphibole and phlogopite-rich metasomes, particularly abundant in the Arabia mantle xenolith suite) contributed significantly to the partial melts. \"Average\" peridotitic matrix is involved in partial melting processes only when these metasomatic volumes start to be exhausted, producing mantle melts with geochemical composition resembling average \"anorogenic\" mildly alkaline sodic rocks, common in the circum-Mediterranean area. (literal)
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