The carbonaceous siltstone rock material is a disseminated sulfide-rich sedimentary rock from a sediment-hosted gold deposit of Bakyrchik. The Bakyrchik deposit is located in Eastern Kazakhstan, which includes in Qalba gold province. The main purpose of this paper is a demonstration on chemical extraction of heavy metals from the carbonaceous siltstone rock and detection of its elemental concentrations. In the work was used a rock sample from the deposit which is a sericizited carbonaceous-siltstone rock. In sequential extraction method was selected four stages such as water soluble fraction (reaction with deionized water) for extraction of water soluble metals, reducible metal fraction (reaction with hydroxyl ammonium chloride) for extracting all reducible metals, organics and sulfides (reaction with hydrogen peroxide) for dissolution of organics and copper sulfide, and extraction of metal oxides and residual fraction (reaction with aqua regia) for extracting of all remaining metals.
The paper comprises analytical methods for research outlooks. They are X-Ray Diffraction (determination of mineralogical composition), X-Ray Fluorescence (determination of chemical composition) and Inductively Coupled Plasma – Optical Emission Spectrometry (determination of heavy metal concentrations).
Anbar A.D., Rouxel O. (2007) Metal stable isotopes in paleoceanography. Annu Rev Earth Planet Sci 35:717–746.
Beckett P.H. (1989) The use of extractants in studies on trace metals in soils, sewage sludges, and sludge-treated soils, Adv. Soil Sci., 9, 143-176.
Davidson C.M. Ferreira PCS., Ure A.M. (1999) Some sources of variability in application of the three-stage sequential extraction procedure recommended by BCR to industrially-contaminated soil. Fresenius’ J Anal Chem 363:446–451. Dold B. (2003) Speciation of the most soluble phases in a sequential extraction procedure adapted for geochemical studies of copper sulfide mine waste. Journal of Geochemical Exploration 80, 55-68.
Dold B. & Fontboté, L. (2001) Element cycling and secondary mineralogy in porphyry copper tailings as a function of climate, primary mineralogy and mineral processing. Journal of Geochemical Exploration 74 (1-3), 3-55.
Heikkinen, P.M. & Räisänen, M.L. (2008): Mineralogical and geochemical alteration of Hitura sulphide mine tailings with emphasis on nickel mobility and retention. Journal of Geochemical Exploration 97, 1–20.
Kulp T.R., Pratt L.M. (2004) Speciation and weathering of selenium in Upper Cretaceous chalk and shale from South Dakota and Wyoming, USA. Geochim et Cosmochim Acta 68:3687–3701.
Liang L., Jian-Ming Zh. (2016) An optimized sequential extraction scheme for molybdenum association in environmental samples, Acta Geochim 35(2):111–119, DOI 10.1007/s11631-016-0096-4.
Plekhova K.R., Zhautekov T.M., Bagybek, L.D. (2014) The morphogenetic diversity of the pyrite as a mineralogic search criteria for gold-bearing rocks of the West Kalba metallogenic zone. Header of the academy of sciences in Kazakhstan 1, 1, 45-53.
Rafaylovich S., Myzernaya M.A., D’yachkov B.A. (2011) Giant gold deposits in black shale formations: origin and similarity (Krupnye mestorozhdenya zolota v chernoslancevyz tolshah: uslovya formirovanya, pryznaky shodstva) (in Russian). Luxe Media Group Press. First edition.
Seitkan A., Simon A.T. Redfern. (2016) Processing double refractory gold-arsenic-bearing concentrates by direct reductive melting. Minerals Engineering, 98, 1-17, DOI:0.1016/j.mineng.2016.08.017
Tessier, A., Campbell, G.C. & Bisson, M. (1979) Sequential Extraction Procedure for the Speciation of Particulate Trace Metals. Analytical Chemistry 51 (7), 844-851.
Umarbekova Z.T., Dyusembayeva K.S., Kubashev K.T. (2017) The Bakyrchik deposit and views on the formation of the mineral deposits in black shale beds. SGEM 17, 11, 1111-1117.