Features of Geological Modelling, Mineral Resources and Reserves Estimation of Uranium Roll-Front Deposits

CSA Global’s Principal Resource Geologist, Dr Maxim Seredkin will present on “Features of Geological Modelling, Mineral Resources and Reserves Estimation of Uranium Roll-Front Deposits” between 25-29 June 2018 at the International Symposium on Uranium Raw Material for the Nuclear Fuel Cycle: Exploration, Mining, Production, Supply and Demand, Economics and Environmental Issues (URAM-2018) in Vienna, Austria.

The symposium will look to analyse uranium supply and demand scenarios and to present and discuss new developments in uranium geology, exploration, mining, milling and processing, as well as environmental requirements for uranium operations and site decommissioning.

URAM 2018 will bring together scientists, managers, exploration and mining geologists, mineral economists and engineers to exchange information and discuss current issues related to uranium geology and deposits, exploration, mining and processing, production economics and environmental and legal issues.


The roll-front deposits in Kazakhstan is the source of 40% of the World uranium. Methodology of modelling was developed based on uranium deposits in Chu-Sarysu and Syrdarya basins.

The following issues are important for correct modelling and Mineral Resource estimation for these deposits:

-Estimating thickness and grades of mineralised intervals based on identifying radiological factors: cut off radium grades and radioactive equilibrium factors;
-Definition of intervals of permeable rocks which can be treated by In-Situ Recovery (ISR);
-Wireframe modelling includes the following: modelling of mineralised horizons based on lithology and redox fronts; noses, upper/wings and residuals of rolls using geochemical location of mineralisation; impermeable
-Grade-thickness or productivity (kg/m2) of mineralised bodies is most appropriate parameter for Mineral Resource Estimation for ISR;
-Mineralisation in impermeable sediments are attributed for excluding from the Mineral Resource estimate

The following issues are important for Mineral/Ore Reserve estimation for any deposits for ISR:

-The volume of rock exposed to leaching is defined based on design of operation blocks and/or hydrodynamic modelling;
-Recovery of uranium should be defined using Liquid:Solid ratio versus uranium Recovery.


Dr Maxim Seredkin - Principal Resource Geologist

Dr Maxim Seredkin
PhD, BSc, FAusIMM, MAIG, Expert OERN

Dr Seredkin has more than 18 years’ experience in exploration, mining production and resource estimation. He has experience in a range of commodities and reporting codes (including JORC and NI43-101). Maxim is particularly sought after in industry and academia for his expertise in uranium, he has in-depth experience across a range of geological settings and deposit types. He has specialist skills in the application of in-situ recovery for uranium extraction based on 5 years of direct operational experience. In addition to uranium expertise, Maxim has experience in bauxite, rare earths and iron ore. Maxim has a strong scientific background, with research experience in ore genesis, petrology and the mineralisation of carbonatite, alkaline and ultramafic complexes, in hydrothermal-metasomatic gold and tungsten deposits.

URAM 2018

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