Crustal contamination and mantle source characteristics in continental intra-plate volcanic rocks Pb, Hf and Os isotopes from central European volcanic province basalts推荐.pdfVIP

Crustal contamination and mantle source characteristics in continental intra-plate volcanic rocks Pb, Hf and Os isotopes from central European volcanic province basalts推荐.pdf

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Crustal contamination and mantle source characteristics in continental intra-plate volcanic rocks Pb, Hf and Os isotopes from central European volcanic province basalts推荐

Available online at Geochimica et Cosmochimica Acta 75 (2011) 2664–2683 /locate/gca Crustal contamination and mantle source characteristics in continental intra-plate volcanic rocks: Pb, Hf and Os isotopes from central European volcanic province basalts a,⇑ b c d S. Jung , J.A. Pfander , M. Brauns , R. Maas ¨ a Universitat Hamburg, Dept. Geowissenschaften, Mineralogisch-Petrographisches Institut, Grindelallee 48, 20146 Hamburg, FRG ¨ b Technische Universitat Bergakademie Freiberg, Geologisches Institut, 09599 Freiberg, FRG ¨ c Curt-Engelhorn-Zentrum Archaometrie gGmbH, 68159 Mannheim, FRG ¨ d University of Melbourne, Dept. of Earth Sciences, Melbourne, Australia Received 2 March 2010; accepted in revised form 4 February 2011; available online 19 February 2011 Abstract We report new Os–Pb–Hf isotope data for a suite of alkaline to basaltic (nephelinites, basanites, olivine tholeiites to quartz-tholeiites) lavas from the Miocene Vogelsberg (Germany), the largest of the rift-related continental volcanic complexes of the Central European Volcanic Province (CEVP). 187Os/188Os in primitive (high-MgO) alkaline lavas show a much wider range than has been observed in alkaline basalts and perid

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