caa a22 4500 467890161 CHVBK 20180406152746.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s00710-005-0095-3 doi (NATIONALLICENCE)springer-10.1007/s00710-005-0095-3 The Spačice eclogite: constraints on the P-T-t history of the Gföhl granulite terrane, Moldanubian Zone, Bohemian Massif [Elektronische Daten] [L. G. Medaris Jr., E. D. Ghent, H. F. Wang, J. H. Fournelle, E. Jelínek] Summary: In the Kutná Hora Complex, the Běstvina Formation, which is similar to Gföhl granulite, contains eclogite that has escaped widespread retrograde recrystallization. The eclogite assemblage, garnet + omphacite + quartz + rutile ± plagioclase, yields an estimate for peak metamorphic conditions of 18-20 kbar and 835-935 °C, which is comparable to that determined from felsic granulite, 14-20 kbar and 900-1000 °C. Garnet in eclogite exhibits both prograde and retrograde compositional zoning, from which constraints on thermal history of the Gföhl terrane can be derived by diffusion modelling. At 900 °C, a garnet grain of 800-1000 μm radius would homogenize in 7.5-11.7 million years, but the existence of compositional gradients on a length scale of 100-200 μm suggests that the duration of peak metamorphism may have been limited to ∼500,000 years. Diffusion modelling of retrograde zoning in garnet yields a cooling rate of 150-100 °C/m.y. for a radius of 800-1000 μm and initial temperature of 900 °C. The relatively brief duration of high-pressure/high-temperature metamorphism and rapid cooling and exhumation of the Gföhl terrane may be a consequence of lithospheric delamination during Early Carboniferous collision of Bohemia (Teplá-Barrandia) and Moldanubia (Franke, 2000). Springer-Verlag/Wien, 2005 Medaris Jr. L. G. Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI, USA aut Ghent E. D. Department of Geology and Geophysics, University of Calgary, Calgary, Alberta, Canada aut Wang H. F. Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI, USA aut Fournelle J. H. Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI, USA aut Jelínek E. Institute of Geochemistry, Mineralogy and Mineral Resources, Charles University, Praha, Czech Republic aut Mineralogy and Petrology Springer-Verlag 86/3-4(2006-03-01), 203-220 0930-0708 86:3-4<203 2006 86 710 https://doi.org/10.1007/s00710-005-0095-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00710-005-0095-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Medaris Jr L. G. Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI, USA aut NATIONALLICENCE 700 1- Ghent E. D. Department of Geology and Geophysics, University of Calgary, Calgary, Alberta, Canada aut NATIONALLICENCE 700 1- Wang H. F. Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI, USA aut NATIONALLICENCE 700 1- Fournelle J. H. Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, WI, USA aut NATIONALLICENCE 700 1- Jelínek E. Institute of Geochemistry, Mineralogy and Mineral Resources, Charles University, Praha, Czech Republic aut NATIONALLICENCE 773 0- Mineralogy and Petrology Springer-Verlag 86/3-4(2006-03-01), 203-220 0930-0708 86:3-4<203 2006 86 710 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer