Xanadu Mines Ltd (ASX: XAM, TSX: XAM) (“Xanadu” or “the Company”) is pleased to announce significant improvements in copper and gold recoveries from metallurgical testing from its flagship at Kharmagtai project, which is located in the south Gobi region of Mongolia (Figure 1). The new metallurgical test programme has expanded on that conducted during the 2018 Mineral Resource Estimate (see Xanadu’s ASX/TSX announcement dated 31 October 2018) and 2019 Scoping Study (see Xanadu’s ASX/TSX announcement dated 11 April 2019) and has produced substantial improvements in copper and gold recovery and in copper concentrate copper and gold grades.
- Metallurgical test work yields high grade copper and gold concentrate at Kharmagtai
- Improved metallurgical recoveries indicate a major value uplift for Kharmagtai
- An estimated 4.5% increase in copper recovery to achieve an average recovery of 89.5% for the two main metallurgical composites
- An estimated 3% increase in gold recovery to achieve an average recovery of 69.7% for the two main metallurgical composites
- Concentrate grades averaged 25.2% Cu and 25.8g/t Au for the two locked cycle tests
- Further optimisation work may lead to further improvements
UPDATED METALLURGICAL TESTS FOR KHARMAGTAI
The key differences between the 2008 test work and the 2019 test work relate to head grade and sample selection. The 2008 tests were conducted on samples with copper and gold grades not representative of the bulk of the open pit mineralisation. Samples selected for the 2008 test work were not selected based on metallurgical or geological domains. In contrast, samples within the 2019 test program were selected based on a geometallurgical model developed by CSA Global, which represents different rock and alteration types throughout the three deposits. These rock and alteration types will represent the largest variability in metallurgical responses and selecting composites based on these give a much more robust dataset for metallurgical performance.
SOURCE: Xanadu Mines
DATE: December 11, 2019