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Andean Precious Metals announces mineral resource estimate for its dry-stack tailings facilities

Published by , Editorial Assistant
Global Mining Review,

Andean Precious Metals Corp. has announced the initial mineral resource estimate for the company’s dry-stack tailings facility (DSF) and an update of metallurgical test results from its fines disposal facility (FDF).


  • Samples from 48 DSF sonic drill holes returned very consistent assays averaging 42.7 g/t silver (Ag) and tin (Sn) assays averaging 0.15% Sn.
  • Combined with the current FDF mineral resource, the two facilities contain 10 million t of indicated resources and 19.6 million t of inferred resources containing silver and tin. Both estimates were prepared by SRK Consulting Inc.
  • FDF metallurgical test results indicate that the deposit is variable in mineralogy and particle sizing. Preliminary test work suggests that metallurgical recoveries for Sn of 40 - 50% could potentially lead to the production of low-grade tin concentrates. This is in line with early estimates by the company.
  • Initial test work is now underway for the DSF and, if positive, will allow Andean to evaluate the merits of a much larger combined FDF/DSF reprocessing project.
  • Tin price has declined from US$40 000/t to US$20 000/t during 2022, which will be considered in the initial economic modelling for the project.

President and CEO, Simon Griffiths stated:

“Based on the new additional resource estimate for the DSF and the initial metallurgical test results for the FDF, the company is considering expanding the scope of the expansion study incorporating both FDF and DSF. The average grades in the DSF are similar for silver, but higher for tin, to those within the FDF.”

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