Kootenay Silver Announces Results of Updated NI 43-101 Resource Estimate
posted on
Aug 21, 2012 12:48PM
Kootenay's La Negra prospect is a significant and exciting new high grade silver discovery that offers exceptional potential to evolve into a substantial near surface, open-pit resource.
Kootenay Silver Announces Results of Updated NI 43-101 Resource Estimate on its Flagship Promontorio Silver Project in Sonora, Mexico
Kootenay Silver Inc. (TSX VENTURE: KTN.V) is pleased to announce that an updated resource estimate performed by SRK Consulting (U.S.) Inc. of Lakewood, Colorado (“SRK”) on its Promontorio Silver Project has resulted in a significant increase in the size of Promontorio’s Measured and Indicated mineral resources.
Resource Statement
The open pit mineral resources for the Promontorio Project are 36,018,000 tonnes grading an average of 51.35 g/t silver equivalent classified as Measured and Indicated Mineral Resources, with an additional 9,136,000 tonnes grading an average of 42.86 g/t silver equivalent classified as Inferred Mineral Resources. This resource is stated above a 15.00 g/t cut-off grade and contained within potentially economically mineable pit shells.
Underground mineral resources are 2,216,000 tonnes grading an average of 48.75 g/t silver equivalent classified as Indicated Mineral Resources, with an additional 3,077,000 tonnes grading an average of 53.90 g/t silver equivalent classified as Inferred Mineral Resources. The resource is stated above a 35.00 g/t cut-off grade to reflect the higher mining costs associated with underground production.
The updated Measured and Indicated resource contains an estimated 61,679,000 oz Ag Eq with another 14,469,000 oz Ag Eq categorized as Inferred.
The following material changes incorporated into the updated resource estimation contributed to the significant increase in the mineral resource;
? Significantly, extensive additional drilling has been incorporated into the new estimation. This includes over 37,900 meters of new drilling to expand the previous resource, as well as define an entirely new area to the NE of the previous resource. Over 22,000 samples were used in the modeled wireframes compared to just over 3,000 for the previous model.
? The new zones of mineralization have been defined through careful logging of the geology, and have been defined as wireframes that are volumetrically almost 15x larger than the previously modeled high-grade core that limited the estimation.
? Silver prices used for calculations of cutoff grades and equivalencies in the previous report were $15/oz, less than half of the current 18-month rolling average of $34/oz. This had a positive significant impact on the amount of material included in the pit optimization.
Kootenay President and CEO James McDonald states, “It is immensely satisfying to see the hard work and diligence of our entire team on the ground and in the office be rewarded by such an excellent result. We cannot emphasize enough the significance that the 59 million measured and indicated silver equivalent ounces are contained within two optimized Whittle Pits. This bodes extremely well for the potential economic viability of the Promontorio project and our objective of seeing Promontorio become a prominent Mexican silver producer.”
Adds McDonald “In addition to the outstanding results, the resource areas remain open in multiple directions and have the potential to materially increase in size yet again. The next steps will be to aggressively pursue the expansion of these resources through drilling and to advance geotechnical, engineering, groundwater and environmental studies to be incorporated into assessing the economic viability of the project.”
The mineral resources are reported in accordance with Canadian Securities Administrators (“CSA”) NI 43-101 and have been classified in accordance with standards as defined by the Canadian Institute of Mining, Metallurgy and Petroleum (“CIM”) “CIM Definition Standards – For Mineral Resources and Mineral Reserves”.
This mineral resource estimate has been completed by Matthew Hastings M.Sc, P.Geo under the direction of Jeffrey Volk, M.Sc. C.P.G., FAusIMM, Principal Resource Geologist with SRK, who has reviewed pertinent geological information in sufficient detail to support the data incorporated in the mineral resource estimate. Mr. Volk is an Independent Qualified Person as defined under NI 43-101 and is responsible for the mineral resource estimate presented in this release.
Drilling data includes a total of 45,118 samples from 65,092m of drilling. Approximately 37,900m has been drilled since the 2010 resource was completed. Of the 45,118 samples in the database, 22,658 lie within the wireframes and were used in the resource estimation. This is significantly more data than the previous estimation, which used only 3,022 samples within the modeled wireframes. Wireframes are three-dimensional closed solids constructed in Vulcan™ and based on a combination of logged geology and assay information. These wireframes limit the estimation.
Three-dimensional wireframes were constructed for the modeled domains using Leapfrog 3D™ modeling software as well as Vulcan™. SRK modeled both the SW/Pit and NE zones independently, and corrected inconsistencies with the Leapfrog solids using Vulcan.
The average sample length for all samples is 1.44m. Samples were composited to 3m lengths within the breccia, stockwork, and PC zones. For the estimation, SRK used Ordinary Kriging in the densely-drilled areas, and Inverse Distance Weighting for the areas with more widely-spaced drilling. SRK applied appropriate block model validation techniques for a resource estimation at this stage of project development.
Pit optimization was conducted using Whittle™ software and evaluating the block model which was constructed in Vulcan™. A cutoff for the pit optimization of 15 gpt and 35 gpt silver equivalent for open pit and underground was used respectively.
Measured, Indicated and Inferred Mineral Resources are categorized as Measured being where at least 3 drill holes occur within a 25 meter ellipsoid, Indicated being where at least 3 drill holes occur within a 50 meter ellipsoid and Inferred being where at least 2 drill holes occur within a 75 meter ellipsoid. Blocks estimated using Inverse Distance Weighting in the widely-spaced drilling intermediate to the two predominant zones were categorized as Inferred.
QA/QC
The majority of holes reported here were drilled with HQ sized diamond drill core with some sections reduced down to NQ sized core. Core samples were cut using a core saw with 1 to 2 meter long sample intervals. A select few holes drilled using reverse circulation methods were included in the resource estimation, but are generally in the areas of more widely-spaced drilling between the two primary zones. Further Quality Assurance and Control procedures and details on assays are disclosed on the Kootenay Gold Inc. website.
SRK, with inputs from Kootenay on specific sections, will be the author of an NI 43-101 compliant Technical Report on the Mineral Resource Estimate for the Promontorio Project, to be filed within 45 days of this news release.
ABOUT KOOTENAY
Kootenay Silver Inc. is actively developing mineral projects in the Sierra Madre Region of Mexico and in British Columbia, Canada. Its flagship property is the former producing Promontorio Silver mine in Sonora State, Mexico. Kootenay’s objective is to develop near term discoveries and long-term sustainable growth. Its management and technical team are proven professionals with extensive international experience in all aspects of mineral exploration, operations and venture capital markets. Multiple, ongoing J/V partnerships in Mexico and Canada maximize potential for additional, new discoveries while maintaining minimal share dilution.
For additional information, please contact:
James McDonald, CEO and President at 403-238-6986
Ken Berry, Chairman at 604-601-5652; 1-888-601-5650
or visit: www.kootenaysilver.com