0.307 ppm Au + 94 ppm Cu + 1.29 ppm Ag (siliceous shale) OREAS 264 - 150g

CAD$17.00 each

OREAS 264 was prepared from oxide heap leach material sourced from the Goldstrike operation in Eureka County in north-eastern Nevada. The mining operation is located on the Carlin Trend and owned by Nevada Gold Mines (operated by Barrick).
Thirty-one commercial analytical laboratories participated in the program to certify the elements shown below. The following methods were employed:

  • Gold by fire assay (15-40g charge weight) with AAS, ICP-OES or ICP-MS finish (31 laboratories);
  • Gold by aqua regia digestion (15-50g sample weight) with ICP-MS, AAS or ICP-OES finish (22 laboratories);
  • Gold by cyanide leach (20-200g) via a variety of cyanide leach methods (LeachWELL tablets, alkaline added sodium cyanide solution and sodium cyanide liquor with LeachWELL powder) with ICP or AAS finish (20 laboratories);
  • Gold by x-ray photon assay on ~350g sample weights using 4 Chrysos PhotonAssay machines at 3 laboratories. Multiple rounds of data (comprising three or six replicates) were generated by different staff from 3 of the machines;
  • Full ICP-OES and ICP-MS elemental suites by aqua regia digestion (up to 25 laboratories depending on the element);
  • Full ICP-OES and ICP-MS elemental suites by 4-acid (HNO3-HF-HClO4-HCl) digestion (up to 25 laboratories depending on the element).
 
CRM Code Principle Certified Values State Matrix Mineralization
OREAS 264 Au 0.307 ppm Cu 94 ppm Ag 1.29 ppm oxide siliceous shale Carlin style 
 

© Copyright 2020 - 2022 OREAS