Hello. Interesting. So the posts I made were invalid.
So ENV appears to be in the same area as Resouro Strategic Metals Inc.
* The RSM grades are much higher than in today's ENV announcement but there appears to be overburden.
* The RSM auger (AG) vs AC drill result seem to be similar to MEI and VMM, namely, the results near surface are not much less than the deeper results.
* I am not sure how to interpret the non-continuity gap between the end of the AG results and the start of the AC results.
* I don't know much about chemistry & I doubt they can be compared yet however the initial RSM test work as you indicated used an 80 degrees celsius leach versus what appears to be a room temperature leach with MEI and VMM .
Some info below:
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RSN: November 1, 2023 Metallurgical Test-work. Over 41% recovery of Neodymium (Nd); over 60% recovery of Dysprosium (Dy);over 31% recovery of Praseodymium (Pr). These results were from material passing 600 mesh, leached at 80 degrees Celsius using a 40ml of 0.5 mole Ammonium Sulphate (NH4)2SO4 with pH starting at 3.5 and finishing at 4.5, with an average pH of 4.
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MEI: 7 December 2023.48 different metallurgical composites across ALL deposits had a TREO head grade of >4,000ppm and achieved average Magnetic REE leach extractions of 73% with 74% Nd, 71% Pr, 57% Tb and 56% Dy with a standard AMSUL wash (unoptimised) at pH4.The metallurgical samples were dried at 60 degrees Celsius and stage crushed to –1mm followed by pulverising in a ring mill. An 80 gram sub sample was used in each diagnostic leach at 4% solids, using 0.4M ammonium sulphate solution, ambient temperature and 30 minutes leaching time at pH 4.0. The % extractions are calculated using the head and the liqour assays.
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VMM: 29 August 2023. All Saprolite surface grab samples have returned Ionic Mineralisation with single-step Ammonium Sulfate [(NH4)2SO4)] wash of pH4 at room temperature from Colossus Ionic Adsorption Clay (“IAC”) Rare Earth Project. Exceptional MREO recovery rates through Ammonium Sulfate leaching, averaging: 46% for Neodymium (Nd) (n = 3, SD = 0.05) 40% for Praseodymium (Pr) (n = 3, SD = 0.05) 38% for Dysprosium (Dy) (n = 3, SD = 0.21) 35% for Terbium (Tb) (n = 3, SD = 0.17). Recovered Neodymium grades on this sample exceeded the 200ppm detection limit for the assay method, meaning actual recoveries are higher than the results presented. This is the highest grade recorded to date on the Colossus Project. These results exemplify a proper single-step recovery process, with whole-rock saprolite clays sampled from outcrop and recovered with an Ammonium Sulfate wash.
(20min delay)