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Abstract The relatively unknown Aldan Shield in eastern Siberia is made up of Archean granite–greenstone and high-grade gneiss terrains as commonly observed in many Precambrian shield areas. New… (More)
Abstract Basic rocks, interpreted as metabasalts, are widely distributed in the early Precambrian high-grade complexes of the Aldan-Stanovoy Shield, Siberia. Discriminant function analysis assuming… (More)
The lead-lead isochron method, with or without lead-thorium and lead-uranium supplementations, proves to be reasonably satisfactory for determining the absolute age of a variety of genetically… (More)