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STOCKWORK GOLD-SULFIDE MINERALIZATION OF THE RAYGORODOK ORE FIELD (NORTH KAZAKHSTAN)
Yu. A. Kalinin, K. R. Kovalev, E. I. Sukhorukova, E. A. Naumov, V. P. Sukhorukov, F. I. Zhimulev
The Raygorodok ore field represents the largest gold-ore objects of stockwork type. The main orehosting structures are sublatitudinal faults healed by dyke-shaped diorite bodies. Mature, thick linear zones of stockwork vein-disseminated gold-bearing mineralization have been formed along zones of maximum fracturing. This specific linear-stockwork type of gold mineralization is characterized by low, but sufficiently stable grade of gold concentration with highly consistent mineralization parameters such as thickness, strike and dip. Ore-hosting rocks are constituted by Lower Ordovician terrigenous deposits (mainly intensively skarn conglomerates) and Devonian intrusive rocks (diorites, granodiorites, porphyritic diorites, granodioriteporphyries, granosyenite-porphyries, gabbros and granites). The presence of free-milling gold-bearing weathering crust significantly increases an economic attractiveness of such objects.
Key words: gold-sulfide mineralization, gold-bearing stockwork, North Kazakhstan.
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