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Location: 54 km SW from Semey, Kazakhstan
122 Frunze streetSemeyKazakhstan071406
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The Suzdal deposit is located on the northwest flank of the Western Kalba gold-bearing belt, Semipalatinsk Irtysh Region (Semey Ertis), Eastern Kazakhstan, in which numerous gold deposits and gold occurrences of different types are hosted in carbonaceous black shales and clastic rocks of Carboniferous age (Kovalev et al., 2009). The Western Kalba belt is considered a terrigenous accretionary complex, located between island arcs of Devonian–Carboniferous age–Rudnyi Altai in the north-east and Zharma-Saur to the south-west, and divided into two metallogenic zones. The Char – Zimunai Belt with Ni-Co and Au mineralization on the southwest and the West Kalba-Koksentau gold zone in the northeast (Kovalev et al., 2012).The Suzdal deposit is located at the juncture of the NW-trending Char-Gornostai-Zimunai and NE- trending Suzdal fault zones, hosted in carbonaceous carbonate-clastic rocks of the Arkalyk Formation of Serpukhovian stage. These rocks are thrust northeastward over the continental deposits of the Maitubinsk Formation, along the NW-trending Gornostai overthrust.The host rocks of the deposit comprise calcareous and carbonaceous siltstone, marl alternating with limestone lenses, and limestones. The mineralization is located within a 4 km long and 300 to 400 m wide, NE-trending Suzdal fault-controlled zone as SW-oriented en-echelon structures with dips of 40° to 90° SE (Kovalev et al., 2009).Gold deposits hosted in carbonate and clastic sedimentary rocks are usually compared with the Carlin-type deposits. While there are several variants of Carlin-type deposits suggested, the Suzdal deposit shows similarities to two subtypes; those hosted in carbonaceous carbonate clastic rock and those hosted in black shale. Although genesis of gold mineralization is still in controversy, a multistage and polygenic character for mineralization in Suzdal deposit is proposed. Most of the gold mineralization is concentrated in silicified and decalcified calcareous polymictic breccias of both sedimentary and tectonic origin, typical of most Carlin-type deposits.
