Počet záznamů: 1
Origin of felsic granulite microstructure by heterogeneous decomposition of alkali feldspar and extreme weakening of orogenic lower crust during the Variscan orogeny
- 1.0357499 - GFÚ 2011 RIV GB eng J - Článek v odborném periodiku
Franěk, J. - Schulmann, K. - Lexa, O. - Ulrich, Stanislav - Štípská, P. - Haloda, J. - Týcová, P.
Origin of felsic granulite microstructure by heterogeneous decomposition of alkali feldspar and extreme weakening of orogenic lower crust during the Variscan orogeny.
Journal of Metamorphic Geology. Roč. 29, č. 1 (2011), s. 103-130. ISSN 0263-4929. E-ISSN 1525-1314
Grant CEP: GA ČR GA205/09/0539
Grant ostatní: GA ČR(CZ) GA205/05/2187
Výzkumný záměr: CEZ:AV0Z30120515
Klíčová slova: felsic granulites * Moldanubian domain * quantitative microstructural analysis * quartz and feldspar rheology * Variscan belt
Kód oboru RIV: DB - Geologie a mineralogie
Impakt faktor: 2.990, rok: 2011
This study answers the question of origin and evolution of a granulitic microstructure typically developed in felsic granulites of the European Variscan belt. It shows that the precursor of the Variscan felsic granulites was a high-pressure alkali feldspar-rich coarse-grained layered orthogneiss. Its S1 subhorizontal layering is defined by the alignment of alkali feldspar porphyroclasts alternating with monomineralic bands of quartz and bands rich in plagioclase and garnet. The alkali feldspar porphyroclasts contain inclusions of quartz, garnet, kyanite, biotite and rutile, reflecting peak P–T conditions of 1.6–1.8 GPa and 850 °C during S1 formation.
Trvalý link: http://hdl.handle.net/11104/0195763
Počet záznamů: 1