The Suzdal gold-sulfide deposit in the black shale of Eastern Kazakhstan

Geology and mineralogy of East Kazakhstan gold-bearing jasperoids (by the example of the Baybura ore field)

“…No correlation between the contents of Au and Hg is observed, but there is a clear direct correlation between Au/Hg and Ag/Hg. In composition the Baybura native gold is most similar to the gold of the Suzdal' deposit (fineness 930-980‰, Hg ≤ 0.3 wt.%) (Kovalev et al, 2012).…”

“…2 and 5). According to detailed studies (Kovalev et al, 2012;Narseev et al, 2001), this deposit, formed by polygene and polychronous sediments, is a genetic type of mineralized zones of veinlet-disseminated ores in Lower Carboniferous carbonate-volcanoterrigenous black shale units. The mineralization is controlled by the NE-striking Suzdal' Fault and bounds with the Early Triassic Semeytau volcanoplutonic structure in the north.…”

“…Note that most of gold deposits and occurrences, including those of jasperoid type, are localized within the Zaisan suture zone, which is the axial part of the Altai accretion-collision system (D'yachkov et al, 2005). The auriferous metallogenic profile of the Zaisan suture zone was apparently determined by elevated contents of gold-bearing sulfides in volcanosedimentary sequences of island-arc type (Kovalev et al, 2012;Shcherba et al, 2000). Remobilization of gold and its appearance as finely dispersed nuggets are first of all related to the collision stage of tectogenesis and the intrusion of sodium silicic melts (Kunush plagiogranite complex, C 3 ).…”

“…In recent years, numerous research works have been carried out here, including elaboration of geological and genetic models and criteria for the prediction and search for unconventional gold deposits in volcanosedimentary and carbonate terrigenous island-arc strata (D'yachkov and Kuz'mina, 2012;D'yachkov et al, 2011). As a reference, the Suzdal' gold deposit is used, whose detailed geological and geochemical characteristics are described by Kovalev et al (2012). According to some characteristics, this deposit is of Carlin type (Radtke 1985;Rafailovich, 2004), but its specific feature is the multistage formation related to the redistribution of gold as a result of collisional tectogenesis and repeated tectonomagmatic activity (from Late Carboniferous to Late Triassic).…”

“…The mineralogical and geochemical characteristics of the parental ore-magmatic system, the time of its origin, the duration of its formation, and its identification features and geodynamic nature are still unclear. These questions are particularly topical for the gold mining industry in Kazakhstan, where global prospecting for gold and accompanying valuable components are performed and the commercial development of large deposits (Bakyrchik, Suzdal') has started (Kovalev et al, 2012;Narseev et al, 2001;Shcherba et al, 2000). At the same time, there is growing interest to small deposits and ore occurrences, including those of goldbearing jasperoids widespread in the region and economically attractive for the simultaneous prospecting for gold and its commercial extraction.…”