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Location: 10 km N from Makedonska Kamenica, North Macedonia
28 Rudarska StrMakedonska KamenicaNorth Macedonia2304
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SASA Mine comprises the Svinja Reka, Golema Reka and Kozja Reka lead-zinc-silver deposits, which lie within the Serbo-Macedonian Massif, a belt which extends through Serbia, Macedonia, Bulgaria, and eastern Greece into Turkey and hosts a large number of lead-zinc deposits. The mineral deposits are located on the eastern flank of a Tertiary intermediate intrusive complex and related porphyry Cu-Mo system, within which a northwest striking stockwork alteration zone is developed. Lead-zinc-silver mineralisation occurs as stratiform deposits hosted predominantly by quartz-graphite schist and marbles of Lower Palaeozoic age at Svinja Reka and by gneisses at Golema Reka. The mineralisation is considered to relate to the intrusion of Tertiary volcanics. High-temperature hydrothermal fluids and bedding-parallel faulting are responsible for metasomatism of the host sediments, producing skarn and base metal mineralisation.The well-defined, partially exploited, lenses of lead-zinc-silver mineralisation dip at approximately 35° to the south-west and typically range in true thickness from between 2 and 30 m. The mineralised lenses are present in parallel sheets (typically two or three bodies, namely the hanging wall, central and footwall orebodies), separated by an interburden with thicknesses of 1 to 10 m. The lenses pinch and swell along strike and down-dip. The mineral deposits are considered to be metasomatic skarn-hydrothermal deposits with replacement and bedding-parallel fault controlled mineralisation. The skarns occur in the form of replacement of marble, whereas the hydrothermal lead-zinc-silver mineralisation appears as replacements and as open-space fillings. The hydrothermal association, which is superimposed onto the skarn assemblages, contains argentiferous galena, sphalerite, pyrite and minor chalcopyrite.
