ZPRÁVA O VÝZKUMU TREMOLITOVÝCH MRAMORŮ U KUROSLEP NA ZÁPADNÍ MORAVĚ (OLEŠNICKÁ SKUPINA, MORAVIKUM)

Roč.7,(2000)

Stanislav Houzar Monika Němečková Milan Novák

PDF
Abstrakt
Calcite and dolomite marbles exposed in small quarry near Kuroslepy forms, up to 20 m thick, elongated body in metapelites (biotite- to muscovite-biotite gneiss) of the Olešnice Group (Moravicum). The tremolite marbles with mineral assemblages Cal + Tr + Phl + Gr ± Dol ± Qtz and Dol + Cal + Tr ± Phl form relative thin layers (< 2 m) within the large metacarbonate body. The PTX conditions of metamorphism estimated from stabilities of the assemblages correspond to Tmax.= 580-620oC at XCO2= 0.2-0.7 and Tmin.= 480-530°C at XCO2= 0.2-0.6 at Ptotal= 500 MPa. Although marble body occurs close to Bíteš orthogneiss, no relics of the HT/LP metamorphism or metasomatic infiltration skarns are evident.

Klíčová slova:
tremolite marbles; geological position; mineral assemblages; Olešnice Group; Moravicum
Reference

Bernroider, M. (1989): Zur Petrogenese präkambrischer Metasedimente und cadomischer Magmatite im Moravikum. - Jb. Geol. B.-A., 132:349-373. Wien.

Eggert, R.G. - Kerrick, D.M. (1981): Metamorphic equilibria in the siliceous dolomite system: 6 kbar experimental data and geological implications. - Geochim. Cosmochim. Acta, 45, 1039-1049. Oxford.

Ferry, J. M. - Burt, D. M. (1986): Characterization of metamorphic fluid composition through mineral equilibria. In Ferry, J. M. (ed.): Characterization of metamorphism through mineral equilibria, Reviews in Mineralogy, 207-262.

Houzar, S. - Novák, M. (1991): Dolomite marbles at contact of the Moldanubicum and Moravicum in the area between Jasenice and Oslavany. - Acta Mus. Morav., Sci. nat., 76, 83-94. Brno.

Jaroš, J. (1992): The nappe structure in the Svratka Dome. - Procced. 1st Inter. Conf. on the Bohemian Massif 1988, 137-140. Praha.

Mísař, Z.: (1961): Geologické postavení bítešské ortoruly. - Čas. Mineral. geol., 6, 3, 289-296, Praha.

Sauter P. C. C. (1983): Metamorphism of siliceous dolomites in the high-grade. - Precambrian of Rogaland, SW Norway. - Geologica ultraiect., 32, 1-143, Utrecht.

Suess, F. E. (1898): Der Bau des Gneisgebietes von Gross Bittesch und Namiest in Mhren. - Jb. K.-Kn. geol. Reichsanst., 47, 505-532, Wien.

Metriky

307

Views

189

PDF views

PDF