Orestone completes airborne geophysical survey at Captain Gold, BC

Vancouver, British Columbia--(Newsfile Corp. - June 16, 2026) - Orestone Mining Corp. (TSXV: ORS) (OTC Pink: ORESF) (FSE: O2R2) ("Orestone" or the "Company") is pleased to announce that the Company has completed a MobileMT airborne MagnetoTelluric (MT) survey covering the partially defined, T-2 conductivity target at the Company's 100 percent owned Captain Gold Porphyry Project in North Central British Columbia. The T-2 target is one of three targets on the property that occur at the intersection of interpreted northeast and northwest trending cross faults. The survey was completed over a 26 square kilometre area by Expert Geophysics Surveys Inc. of Newmarket, Ontario at an estimated cost of $112,000.

The survey consisted of a total of 157-line kilometres flown over 19 east-west lines of seven (7) kilometres each spaced at 200 metre intervals and four (4) north-south tie lines spaced at 2000 metres. The results of the survey will be analyzed in detail and are expected to be received by the Company within 30 days. To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/4752/301585_e0f97ba2f4248879_001full.jpg David Hottman, Chairman and CEO of Orestone Mining Corp., stated: "The 100 percent owned Captain gold-copper project in North Central BC hosts a large gold dominant porphyry system which is permitted and drill ready.

The MobileMT survey is a cost effective and efficient exploration tool to better define the T-2 target prior to the next drill program. MT geophysical surveying is a deep seeking, electromagnetic method typically employed for defining deep structures, geothermal systems, and targeting deep mineralized systems such as porphyry deposits. Examples of large buried porphyry deposits associated with strong resistivity lows (conductivity highs) are the Resolution Mine in Arizona, Collahuasi and El Salvador mines in Chile and the Pebb