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Cryptomelane, a K–Mn-bearing oxide, is widespread in the lowermost part of the weathering/supergene alteration zone of the Hagendorf Pegmatite, SE Germany. This supergene Mn mineral has been used in the present study for K/Ar dating of weathering and paleohydraulic processes as young as Plio-Pleistocene. Different cryptomelane age data found in the same weathering and paleohydraulic system resulted...
Uranyl phosphates (torbernite, autunite, uranocircite, saleeite) and hydrated uranyl silicates (normal and beta-uranophane) found in various erosion levels and structures in the Late Variscan granites at the western edge of the Bohemian Massif, Germany, were the target of mineralogical investigations and age dating, using conventional and more advanced techniques such as Laser-Ablation-Inductive-Coupled-Plasma...
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