Metamorfní původ struktur pyrhotinu, arzenopyritu a löllingitu z Orlíku u Humpolce, Česká republika

Článek v PDF
Acta Mus. Moraviae, Sci. Geol. 98 (2013), vydání 2, stránky 59–67
Článek
Abstrakt:

Metamorphic origin of textures of pyrrhotite, arsenopyrite and löllingite from Orlík near Humpolec, Czech Republic

Sulphidic ores with gold were studied at locality Orlík near Humpolec. Origin of typical arsenopyritelöllingite-pyrrhotite assemblages with invisible gold were previously described as result of LP-HT metamorphosis of older gold-bearing sulphidic ores on various localities worldwide. Results from Orlík show typical features of such assemblages and confirm premetamorphic origin of gold-bearing ores. The conditions of older migmatite metamorphism with temperatures up to 730 °C and pressure decreasing from 6 kbar to 2 kbar were sufficient to decompose premetamorphic arsenopyrite and form löllingite-pyrrhotite assemblages with younger generation of arsenopyrite. Subsequent periplutonic etamorphosis was too weak to significantly affect sulphidic textures.

Kontakt:

Lenka Losertová, Zbyněk Buřival, Zdeněk Losos, Institute of Geological Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic. e-mail: lena.los@seznam.cz, zbynek@burival.com, losos@sci.muni.cz
Jiří Litochleb, National Museum – Natural History Museum, Cirkusová 1740, 193 00 Praha 9 – Horní Počernice, Czech Republic. e-mail: jiri_litochleb@nm.cz

Citace
Losertová, L., Buřival, Z., Litochleb, J., Losos, Z., 2013: Metamorfní původ struktur pyrhotinu, arzenopyritu a löllingitu z Orlíku u Humpolce, Česká republika. – Acta Mus. Morav., Sci. Geol., 98, 2, 59–67 (with English summary)
ISSN: 1211–8796