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High-Mg volcanic rocks from the ca. 250 Ma old Siberian Flood Basalt Province (SFBP) were analyzed for their osmium and neodymium isotopic compositions in order to help to constrain source characteristics as the system evolved. Picrites from the Gudchikhinsky suite, the oldest rocks examined, have γ Os of +5.3 to +6.1 and ϵ Nd of +3.7 to +4.0. The osmium and neodymium isotopic compositions...
New major, trace element and Sr and Nd isotope data are presented for selected lavas from the three uppermost formations in the Siberian Trap, and on over 60 samples of the associated intrusive rocks. The lavas from a 1400 m section are remarkably homogeneous and, apart from four samples of basaltic andesites, SiO 2 =48.4-49.6%, MgO=8.1-6.3%, and Mg * =54-58, TiO 2 =1.05-1...
New major, trace element and Sr and Nd isotope data are presented for selected lavas from the three uppermost formations in the Siberian Trap, and on over 60 samples of the associated intrusive rocks. The lavas from a 1400 m section are remarkably homogeneous and, apart from four samples of basaltic andesites, SiO 2 = 48.4-49.6%, MgO = 8.1-6.3%, and Mg * = 54-58, TiO 2 = 1...
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