Publication details
Metamorfní původ struktur pyrhotinu, arzenopyritu a lollingitu z Orlíku u Humpolce, Česká republika
| Title in English | Metamorphic origin of textures of pyrrhotite, arsenopyrite and lollingite from Orlík near Humpolec, Czech Republic |
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| Authors | |
| Year of publication | 2013 |
| Type | Article in Periodical |
| Magazine / Source | Acta Mus. Moraviae, Sci. geol. |
| MU Faculty or unit | |
| Citation | |
| Field | Geology and mineralogy |
| Keywords | pyrrhotite;arsenopyrite;lollingite;gold inclusions;ore textures;Moldanubian Zone |
| Description | Sulphidic ores with gold were studied at locality Orlik near Humpolec. Origin of typical arsenopyrite-löllingite-pyrrhotite assemblages with invisible gold were previously described as result of LP-HT metamorphic processes. Results from Orlik show typical features of such assemblages and confirm premetamorphic origin of gold-bearing ores. Only the conditions of older migmatite metamorphism with temperatures up to 730oC and pressure decreasing from 6 kbar to 2 kbar were sufficient to decompose primary arsenopyrite and form löllingite-pyrrhotite assemblages with younger generation of arsenopyrite. Consequent periplutonic metamorphism was too weak to significantly affect sulphidic textures. |