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    Université de Neuchâtel

    Determining sedimentation ages of high-grade metamorphic gneisses by their palynological record : a case study in the northern Schwarzwald (Variscan Belt, Germany)

    Hanel, Michael ; Montenari, M. ; Kalt, Angelika

    In: Contributions to Mineralogy and Petrology, 1999, vol. 88, no. 1, p. 49-59

    In the northern Schwarzwald (Moldanubian Zone of the Variscan belt), paragneisses drilled from approximately 2500 m depth at the Bühl-1 drilling site have experienced amphibolite-facies metamorphism and were later partly transformed to mylonites under greenschist-facies conditions. Completely graphitised acritarchs and chitinozoans were recovered from these paragneisses and mylonitic gneisses....

    Université de Neuchâtel

    Contrasting P-T conditions recorded in ultramafic high-pressure rocks from the Variscan Schwarzwald (F.R.G.)

    Kalt, Angelika ; Altherr, Rainer ; Hanel, Michael

    In: Contributions to Mineralogy and Petrology, 1995, vol. 121, no. 1, p. 45-60

    This paper presents mineralogical and textural data as well as thermobarometric calculations on ultramafic high-pressure rocks from the Variscan basement of the Schwarzwald (F.R.G.). The rocks form small isolated bodies within low-pressure / high-temperature gneisses and migmatites. The results of this study constrain contrasting P-T evolutions for four garnet-bearing ultramafic...

    Université de Neuchâtel

    Petrology and geochronology of eclogites from the Variscan Schwarzwald (F.R.G.)

    Kalt, Angelika ; Hanel, Michael ; Schleicher, Helmut ; Kramm, Ulrich

    In: Contributions to Mineralogy and Petrology, 1994, vol. 115, no. 3, p. 287-302

    The Moldanubian basement of the Schwarzwald contains basic to ultrabasic rocks of both crustal and mantle origin which display high-pressure mineral assemblages or relics of such. In order to constrain the P-T-t evolution of the crustal high-pressure rocks, petrological and geochronological studies have been carried out on three eclogite samples. Geothermobarometric estimations indicate minimum...