Uranium & Silver Tailings And Waste Dumps At Eldorado/Echo Bay Mine
During 2006 the Company completed a preliminary sampling of the uranium-silver tailings and waste dumps located at the Company's Eldorado IOCG and uranium project. The tailings are from the former producing Eldorado uranium mine (1933-1960) and Echo Bay Uranium, silver, copper mines (1962-1982). These past producing mines are located in Alberta Star's project area.
These mines are reported to have milled approximately 2.2 million tons of high grade uranium-silver ores leaving behind approximately 1.7 million tons of uranium-silver tailings. (Normin NTGO; SENES Report 2005). The Eldorado Uranium Mine formerly mined and produced 15,000,000 pounds of uranium at a head grade of 0.75% U308 and 8 million ounces of silver, plus, copper, nickel, lead at Eldorado, Port Radium commencing in 1933. The Echo Bay mine produced over 23,779,178 million ounces of silver at an average head grade of approximately 66 ounces per ton up until its closure in 1982.
Approximately 910,000 tons of uranium-silver tailings are currently contained in the Radium Lake and Cobalt Channel areas and additional 800,000 tons of silver tailings are stored in the McDonough Lake containment area (SENES/CDUT Report 2005). An estimated 170,000 tons of uranium tailings were placed in surface depressions and in the Silver Point area and the remaining 740,000 tons were placed in the Cobalt Channel area of the Great Bear Lake.
Eldorado / Echo Bay Mine - Uranium & Silver Tailings
Summary of Tailings Assays from Summer 2006 Field Work
Eldorado / Echo Bay Mine - Uranium & Silver Tailings Summary
Average of 83 tailings sample sites at Port Radium
*Sample spacing is irregular and taken where available
*Assay results are preliminary and subject to natural metal leaching and/or enrichment
*Tailings samples ranged in size from ~1 to 5 Kg
*Tailings from Radium Lake and Labine Point causeway are contaminated with waste rock and were sieved to -20 mesh to remove most of the waste rock gangue
*The oversize material (assumed waste rock) carries metal values
*The results of this work are interpreted to indicate that full tailings delineation and assaying is warranted
The sampling of tailings and drill core was prepared and analyzed in accordance with industry standards. All uranium-silver mine tailings samples were sent ACME Analytical Laboratories located in Vancouver, BC for analysis. ACME is a registered analytical lab for analysis of ICP-MS and ICP-FA techniques.