Browsing ELibrary by Author "Frei R."
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Browsing ELibrary by Author "Frei R."
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Meibom A.; Anderson D.L.; Sleep N.H.; Frei R.; Chamberlain C.P.; Hren M.T.; Wooden J.L. (2003)The existence of a primordial, undegassed lower mantle reservoir characterized by high concentration of 3He and high 3He/4He ratios is a cornerstone assumption in modern geochemistry. It has become standard practice to ...
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Brenker F.E.; Meibom A.; Frei R. (2003)Osmium-rich Pt group element (PGE) alloys occur worldwide in association with chromite in ultramafic (peridotite) complexes. It has been suggested that these Os-rich alloys formed under extreme P-T conditions in the lowermost ...
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Frei R.; Nagler T.F.; Schonberg R.; Kramers J.D. (1998)A combined Re-Os, Sm-Nd, U-Pb, and stepwise Pb leaching (PbSL) isotope study of hydrothermal (Mo-W)-bearing minerals and base metal sulfides from two adjacent shear zone hosted gold deposits (RAN, Kimberley) in the ...
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Frei R.; Villa I.M.; Nagler T.F.; Kramers J.D.; Przybylowicz W.J.; Prozesky V.M.; Hofmann B.A.; Kamber B.S. (1997)Stepwise Pb-Pb leaching (PbSL) has been successfully used to date rock-forming silicates directly linked to metamorphic reactions defining a PT path. The two features of PbSL are an increase of precision and a control on ...
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Frei R.; Kamber B.S. (1995)A new stepwise leaching procedure applied to Ca-bearing silicates enables the selective recovery of radiogenic and common Pb from a mineral, and thus makes single-phase Pb-Pb dating possible. This permits independent dating ...
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