Publication details
Metamorphic origin of sulfidic textures from Orlík near Humpolec, Czech republic
| Authors | |
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| Year of publication | 2013 |
| Type | Conference abstract |
| Citation | |
| Description | 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-beraing 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. Consequent periplutonic metamorphosis was too weak to significantly affect sulphidic textures. |