SEMENOVSKY TAILINGS PROJECT - REPUBLIC OF BASHKIRIA, RUSSIA

SEMENOVSKY TAILINGS PROJECT - REPUBLIC OF BASHKIRIA, RUSSIA

Project Highlights

Gold and Silver to be recovered from old mine tailings.
Eurasia attained maiden reserves approval on the project in mid 2016
3 million tonnes of ore grading 1.2 g/t gold and 20 g/t silver
Total of 3,206 kg of gold in place , 43.2 tonnes of Silver.
Simple cyanide leach circuit recovering 40% of gold preferred. EUA metallurgical study in 2016 provides proof of concept.
Project under consideration pending further finance

Project Summary

'Mine Tailing's' or simply 'Tails' refers to the waste generated by beneficiating ores through a processing plant. Material is typically dispensed as a slurry of water, fine grained sand and silt, and unrecovered valuable metals, in this case gold and silver. A number of factors contribute to encouraging economics of reprocessing these deposits:

  • Vastly reduced mining costs as the material is on surface, free digging, requires limited transport and has already been ground and homogenised
  • No increase in mine footprint makes permitting process more straightforward 
  • Application of modern metallurgy and re-processing technologies recovers more metal
  • Less geological risk associated with the resource as grade and volumes are already well established

Work Programme

Since undertaking this project, Eurasia have contracted a TEO (similar in scope to a pre-feasibility document) and a reserves calculation. This TEO and associated reserves, have now gained state approval as Russian standard C2; 2.99million tonnes of ore grading 1.18g/t Gold and 16.44g/t Silver, and are the maiden reserves for the project. Eurasia undertook a metallurgical sample drill program in early 2016. 5 drill holes testing to the bottom of the dam were split to meter intervals and tested at SGS labs Chita. This metallurgical work was designed to test gold recovery by cyanide leaching, and to give an initial indication as to how a cyanide circuit may be optimised by additional techniques such as grinding, air or oxygen sparging, etc. The location of these holes within the tailings dam are shown in the graphic below.

A simplified schematic diagram below describes the proposed processing route

History

The plant at Semenovsky operated from 1943 to 1998 processing oxide ores chiefly from four local deposits around the Semenovsky Mine in the Republic of Bashkiria. It operated as a gravity concentration plant followed by cyanide leaching of gravity tails with total historic processed ore amounting to 3m tonnes at gold grades ranging from 4 to 20g/t. Several generations of exploration drilling and metallurgical testwork have demonstrated the potential of further gold recovery from the plant tailings.

 

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