@article{RoetzlerRomerBudzinskietal.2004,
  author    = {R{\"o}tzler, Jochen and Romer, R. L. and Budzinski, Hubertus and Oberh{\"a}nsli, Roland},
  title     = {Ultrahigh-temperature high-pressure granulites from Tirschheim, Saxon Granulite Massif, Germany : P-T-t path and geotectonic implications},
  issn      = {0935-1221},
  year      = {2004},
  abstract  = {The Saxon granulites, the type granulite locality, were deeply buried, extremely heated and then rapidly exhumed during the Variscan Orogeny; thus their evolution differs from many granulites elsewhere. The peak-metamorphic assemblages of layered felsic-mafic granulites from a 500 m deep borehole consist of garnet, kyanite, rutile, ternary feldspar and quartz in felsic granulite, and garnet, omphacite, titanite, ternary feldspar and quartz in mafic granulite. A minimum temperature of 1000-1020degreesC, calculated from reintegrated hypersolvus feldspar in felsic and mafic granulites, is consistent with the highest temperature estimates from garnet-clinopyroxene equilibria. Various equilibria in felsic and mafic granulites record a peak pressure of about 23 kbar. Diffusion zoning and local homogenisation of minerals reflect near-isothermal decompression that preceded cooling and partial hydration at medium- to low-pressure. U-Pb dating of titanite yields an age of peak metamorphism at 340.7+/-0.8 Ma (2sigma). However, chemical inheritance from precursor rutile and post-peak Pb loss are also evident, suggesting a protolith age of 499+/-2 Ma (2sigma) and partial resetting down to an age of 333+/-2 Ma (2sigma). Rb-Sr mica ages of 333.2+/-3.3 Ma (2sigma) are interpreted as dating cooling through about 620degreesC. Hence the Saxon granulites were exhumed to the upper crust during the short period of 6-11 Ma, which corresponds to average exhumation and cooling rates of 10 mm/year and 50degreesC/Ma, respectively. Such rapid exhumation is inconsistent with recent numerical models that assume foreland- directed transport of the Saxon granulites in the lower crust followed by extensional unroofing. Instead, high-pressure rocks of the Saxon Granulite Massif and the nearby Erzgebirge experienced a buoyant rise to the middle crust and subsequent juxtaposition with structurally higher units along a series of medium- to low-pressure detachment faults},
  language  = {en}
}
@article{BudzinskiRoetzlerBudzinski1994,
  author    = {Budzinski, Hubertus and R{\"o}tzler, Jochen and Budzinski, Gertraud},
  title     = {Evidence for early variscan very high temperature (1000o C) - high pressure metamorphism of garnet- clinopyroxene granulites in the Saxon Granulite Massif, Germany},
  year      = {1994},
  language  = {en}
}
@article{BudzinskiRoesler1994,
  author    = {Budzinski, Hubertus and R{\"o}sler, Hans J{\"u}rgen},
  title     = {Das Bauprinzip des Granits von Niederbobritzsch bei Freiberg/Sa. auf Grund seiner geochemischen Analyse},
  year      = {1994},
  language  = {de}
}