Journal article
Crustal contamination and mantle source characteristics in continental intra-plate volcanic rocks: Pb, Hf and Os isotopes from central European volcanic province basalts
S Jung, JA Pfänder, M Brauns, R Maas
Geochimica Et Cosmochimica Acta | Published : 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 peridotite xenoliths from elsewhere in the CEVP, from ratios similar to those in modern MORB and OIB (0.1260-0.1451; 58.9-168ppt Os) to more radiogenic ratios (0.1908 and 0.2197; 27.6-15.1ppt Os). Radiogenic Os is associated with high εHf and εNd, low 87Sr/86Sr and does not correl..
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Funding Acknowledgements
The Pb isotope measurements were made possible by the Max-Planck-Institut fur Chemie in Mainz while S.J. was on leave from the institute and the senior author appreciates the hospitality and support throughout the years. S.J. thanks Erik Scherer (Munster) for help with the collection of the Hf isotope data. Jorg Pfander acknowledges support from the Zentrallaboratorium fur Geochronologie (Munster) by Klaus Mezger. As usually, Iris Bambach (Mainz) produced high-quality figures and her help is highly appreciated. Thorough and stimulating reviews by J. Day and an unknown reviewer resulted in significant improvements of the original manuscript and are highly appreciated. We also acknowledge the patient editorial handling by S. Shirey.