공시 • Jun 10
American Tungsten Reports Strong Drilling Results from Lower D-Level and Expands Mineralization with Multiple Footwall Intersects
American Tungsten Corp. reported additional assay results for drillholes completed from the D-level of the Ima mine, Lemhi County, Idaho. Drilling in the footwall of the No. 5 and 7 vein system has delineated multiple stacked tungsten bearing polymetallic veins outside of previously mined areas. Step-out drilling in the No. 5 and 7 vein continues to delineate significant tungsten mineralization. Highlighted intercepts in the No. 5 and 7 veins include: 24 ft grading 0.75% WO3 and 3.06 oz/t Ag in hole AT26-23, in the No. 5 vein; 8 ft grading 0.53% WO3 and 1.1 oz/t Ag in hole AT26-12, in the No. 5 vein; 15.8 ft grading 0.33% WO3 and 0.66 oz/t Ag in hole AT26-12, in the No. 7 vein. Significant intercepts in newly defined veins below the D-Level include: 5.2 ft grading 1.41% WO3 and 3.97 oz/t Ag in hole AT26-24, in the No. 2 vein; 4.4 ft grading 1.78% WO3 and 0.94 oz/t Ag in hole AT26-27, in the No. 1 vein; 3 ft grading 0.41% WO3 and 0.51 oz/t Ag in hole AT26-24, in the No. 1 vein; 12 ft grading 0.47% WO3 and 2.87 oz/t Ag in hole AT26-29, in the No. 1 vein; 16.3 ft grading 0.29% WO3 and 0.59 oz/t Ag in hole AT26-29, in the No. 0 vein; 5 ft grading 0.72% WO3 and 0.46 oz/t Ag in hole AT26-20, in the No. 0 vein. Four drillholes have been completed into the footwall of the D-level vein system and intersected multiple hubnerite-scheelite-tetrahedrite bearing quartz veins and stacked vein arrays ranging from one foot to over 5 feet in width. Newly identified veins were numbered consecutively with historically named veins and include the No. 2, No. 1 and No. 0 vein, in addition to multiple minor veins, 1-2 ft in width, sometimes grading >1% WO3. Veins are interpreted as moderately southwest dipping, sub-parallel to the No. 3-5-7-8 vein system in the hanging wall, conformable with host host-rock stratigraphy. Holes AT26-20, AT26-24, AT26-27 were drilled sub-perpendicular to the veins; holes AT26-26 and AT26-29 were drilled oblique and true width of veins is estimated to be 50-65% of assay intercept widths. Drilling from the second D-level drill station has defined discrete veins and sheeted vein arrays as extending 300 to 400 feet down-dip and up to 200 feet along strike. Additional drilling into the footwall vein system from existing D-level drill stations is planned to establish along-strike continuity of mineralization in the footwall target as part of the Company's on-going Phase 2 exploration program. In addition to drillholes in the footwall, results from holes AT26-11, 12 and 23, which were drilled from the second D-level drill station upward, successfully intersected the No. 5 and 7 veins up-dip of the D-level. Additional upward fan-drilling is underway from the third D-level drill station and a crosscut into the footwall of the D-level is being developed to further expand the lateral limits of mineralization. Assay results for the bottom of hole AT26-29 are pending and will be released when complete. Drillhole AT26-23 was extended off the claim block for due diligence purposes and results cannot be fully disclosed. Exploration drilling at the Ima project is on-going with two surface drill rigs and two underground drill rigs currently operating. To date, over 10,000 feet of drilling and 24 drillholes have been completed on the D-level, with an additional 7,600 feet of drilling completed on the Zero-level and surface. Additional assay results for completed Zero-level and D-level drillholes will be released once received and compiled. New drillhole results are reported in Table 1 below. Assays for additional completed drillholes are pending. To date, American Tungsten has completed 24 drillholes on the D-level and 15 drillholes on the Zero-level of the mine totaling approximately 17,600 feet. Mineralization in the principal veins consists of variable assemblages of hubnerite, scheelite, tetrahedrite, galena, sphalerite, and chalcopyrite, plus fluorite and rhodochrosite. Additional mineralization is associated with minor veins and stockworks within intervening metasedimentary host rocks. The Ima Mine is a past producing underground tungsten mine situated on 22 patented claims located in East Central Idaho. Between 1945 and 1957, the property produced approximately 199,449 MTUs of WO3 and was subsequently explored for molybdenum and tungsten by various operators between 1960-2010. American Tungsten Corp. is currently conducting an exploration drill program and assessing potential for re-start of underground tungsten mining operations at the IMA Mine. Drillholes were completed using Hagby 1000 or Sandvik 130 drill rigs with NQ sized rods. Drill core was transferred to American Tungsten geologists under chain of custody and stored in a secure facility. Drill core was logged for lithology, alteration, mineralization, and structure prior to sampling. Sample number tags were affixed to core boxes and core marked for sawing. Core was sawn in half, with one half submitted for analysis and the remaining half retained for reference. Samples were collected at approximate 5 foot intervals in wall rock and shorter intervals within vein mineralization, with sample lengths adjusted to geological boundaries where appropriate. Samples were submitted for assay to ALS Global in Twin Falls, Idaho. American Tungsten Corp.'s Quality Assurance and Quality Control QA/QC program applies industry standard best practices to ensure data quality and integrity for the IMA Mine project, including maintaining chain of custody, secure sample transport and storage, adherence to data collection protocols and inclusion of certified reference, blank and duplicate quality assurance samples in laboratory submissions. Samples were submitted to ALS Global laboratory in Twin Falls, Idaho, for preparation. Samples were crushed to 70% passing 2 mm screen, rotary splitting 250g and pulverized to 85% passing a 75 µm screen. Samples were analyzed by ALS Minerals in the Vancouver, BC, Canada. Samples were analyzed by four acid digest with ICP-MS finish. Samples exceeding 200 ppm W were analyzed by XRF with lithium borate fusion preparation. Samples exceeding 50ppm Ag were analyzed by fire assay with gravimetric finish. Technical information in this news release has been prepared in accordance with Canadian regulatory requirements set out in National Instrument 43-101 - Standards of Disclosure for Mineral Projects.