VANCOUVER, BC — February 25, 2026 — Leads & Copy — Kootenay Silver Inc. has commenced a three-dimensional induced polarization (3D-IP) and Audio-Magnetotelluric (AMT) geophysical survey at its Columba Silver Project in Chihuahua State, Mexico.
The survey will encompass over 1,250 hectares and is expected to take approximately 8 weeks to complete. SJ Geophysics Ltd, of Delta B.C., is conducting the work planned on 100-meter spaced lines, with individual lines ranging from approximately 2.6 to 4.0 kilometers in length.
Previous drilling at the Columba Silver Project successfully delineated near-surface and intermediate-depth silver zones, leading to a maiden inferred category Mineral Resource Estimate (MRE) of 54.1 Moz silver within 5.92Mt at a grade of 284 gpt silver. The inferred resource also contains 25.2Mlb lead and 65.6Mlb zinc at grades of 0.19% lead and 0.50% zinc. The technical report for the MRE is entitled “Technical Report on the Maiden Mineral Resource Estimate for the Columba Ag-Pb-Zn Project, Chihuahua State, Mexico” and is dated August 1, 2025, with an effective date of May 29, 2025. The report is filed on SEDAR+ and available on the company’s website.
The company believes that the ground geophysics, combined with existing geologic knowledge from over 235 drill holes, will provide valuable insights for discovering additional concealed mineralization at Columba, both along existing structures like the D Vein and in areas not yet tested by drilling.
Data will be acquired using a diamond-mesh array configuration designed to image chargeability and resistivity contrasts associated with sulphide mineralization, providing a robust depth of investigation exceeding one kilometer depending on subsurface resistivity conditions. In conjunction with the 3D-IP survey, AMT data will be collected during 3D-IP transmitter off-times using high-sensitivity induction magnetometers and the same electric dipole array. The AMT component is expected to provide complementary deep resistivity information, enhancing the Company’s ability to map major structures, alteration zones, and potential feeder systems beneath and beyond the limits of existing drilling.
The integrated 3D-IP and AMT datasets will be processed and inverted into three-dimensional resistivity and chargeability models, which will be used to refine drill targeting and guide future exploration programs at Columba.
Mr. Dale Brittliffe, VP Exploration, states that the additional information gained from the new 3D-IP and AMT survey will help interpret the complex geological relationships at depth, and vector into zones of highest potential along existing mineralized structures and also additional hotspots on the as-yet undrilled veins mapped at Columba.
Kootenay Silver is currently drilling with two diamond drills and is about 15,000 meters into its current 50,000 meter drilling program of extension and exploration. The recently closed financing allows for another 10,000 meters of budgeted drilling beyond the current 50,000 meter program.
Kootenay Silver has also clarified that they have changed the measured and indicated silver equivalent and inferred silver equivalent ounces on their website and corporate presentation as the prior calculation excluded the lead and zinc contained in the La Cigarra deposit. The result increases the M+I category by approximately 4% and increases the inferred category by just under 2%.
The company continues to advance the Columba Project as a core silver exploration asset.
The Kootenay technical information in this news release has been prepared in accordance with the Canadian regulatory requirements set out in National Instrument 43-101 and reviewed and approved on behalf of Kootenay by Mr. Dale Brittliffe, BSc. P.Geo.
Kootenay Silver Inc. is an exploration company actively engaged in the discovery and development of mineral projects in the Sierra Madre Region of Mexico. The Company remains focused on the expansion of its current silver resources, new discoveries and the near-term economic development of its priority silver projects located in prolific mining districts in Sonora, State and Chihuahua, State, Mexico, respectively.
Source: Kootenay Silver Inc.
