Poruba pod Vihorlatom
The Porubsky potok (Poruba pod Vihorlatom) licence area is located approximately 75km ENE of the town of Košice in the east of Slovakia. The most recent exploration over the licences was conducted in 2008 and comprised resistance (SOP), induced polarisation (IP) magnetometry and gravity profiling, together with soil geochemical and lithogeochemical sampling.
Lithogeochemical samples were collected from an old quarry in the central part of the licence area. As might be expected, these had higher gold values than the soil samples with a maximum of 0.147g/t Au, as well as Te, Se, Bi and As values indicating the presence of a high sulphidation system associated with argillic and propylitic alteration.
The two licence areas cover andesite stratavolcanoes with sub-volcanic diorite bodies beneath them. These are related to NW-SE and NE-SW fault zones and their intersections, and are associated with high sulphidation systems. This is the same geological situation as exists at the nearby Morské base metal occurrence, except that at Morské the diorite porphyries and diorites are believed to be larger and they occur at outcrop. At Porubsky potok and Ruská Bystrá, gravity and magnetic anomalies indicate a sub-volcanic body in the centre of the licence areas.
At Porubsky potok, IP and resistance anomalies that surround the sub-volcanic body are supported by coincident, low-value geochemical (Te-Se-Bi-As and Au) anomalies indicating a high sulphidation system. Cu, Pb and Zn anomalies are located in the further parts of the supposed sub-volcanic intrusions. Their values are again low. Lithogeochemical samples were collected from an old quarry in the central part of the licence area. As might be expected, these had higher gold values than the soil samples with a maximum of 0.147g/t Au, as well as Te, Se, Bi and As values indicating the presence of a high sulphidation system associated with argillic and propylitic alteration.
The Porubsky potok and Ruská Bystrá areas are very similar in terms of their geology, geochemical and geophysical characteristics except that at Porubsky potok the subvolcanic bodies are larger and their associated geochemical anomalies and alteration are more intense. This suggests that the mineralisation at Porubsky potok is probably not very deep (about 100m) below the surface, as compared with Ruská Bystrá (probably over 200m
