Orosur Mining drills 71.85 m of 6.13 g/t Au at Anza

Mr. Brad George reports OROSUR MINING INC ANNOUNCES INFILL CONTINUES TO DELIVER, 71.85M @ 6.13G/T AU Orosur Mining Inc. has provided an update on the progress of exploration activities at the company's flagship, 100-per-cent-owned, Anza gold project in Colombia and its El Pantano gold/silver project in Argentina. Orosur Mining - - infill drilling continues to deliver, 71.85 metres at 6.13 grams per tonne Au; Assays from four more holes from the Pepas MRE infill program include: PEP050 -- 34 m at 2.33 g/t Au from surface; PEP051 -- 61.3 m at 3.36 g/t Au; PEP052 -- 71.85 m at 6.13 g/t Au. El Cedro soil sampling 45 per cent complete -- first samples submitted for assay; Contracts being finalized for El Pantano (Argentina) drilling -- planned to commence mid-October. Anza -- Colombia As announced on July 14, 2025, the company took the formal decision to commence infill drilling at its Pepas gold prospect at Anza with the objective of moving Pepas to a National Instrument 43-101-compliant mineral resource estimate (MRE) by the end of the year. The first several holes of this program (announced July 17, 2025), vindicated this decision by returning exceptional widths and grades, especially hole PEP045 which returned 62.3 m at 12.76 g/t Au. The drill program has been designed in conjunction with external consultants to facilitate a MRE being calculated, with the multiple objectives of infilling previous drilling, expanding beyond current drilling to define the boundaries, and understanding the geological controls upon mineralization and the variations in geology and grade across the deposit. Holes will be drilled in an order that attempts to address these issues concurrently. These four holes announced today are a continuation of this program and designed largely to infill to the required spacing to allow a MRE to be calculated to a high level of confidence. Drilling continues to return thick sequences of high-grade gold mineralization, starting from surface or near surface. Importantly, drilling is also providing guidance as to grade and mineralogical variation across the ore body that will allow the company's teams to define various metallurgical domains that will in turn form the basis of more advanced metallurgical studies that are planned to commence soon. El Cedro -- Anza, Colombia The El Cedro prospect is a large gold porphyry system, located toward the south of the Anza project, on the same granted exploration licence as the Pepas and APTA deposits. The company has recommenced a large ridge and spur soil sampling program that had been previously suspended due to seasonal rain and access issues. This program is now roughly 45 per cent complete, and it is expected that the remainder of the program should be completed by mid-October, 2025. The first batch of 40 samples from the restarted program have been submitted for assay this week, with results expected soon. El Pantano -- Argentina The El Pantano project is an early stage gold/silver exploration project in Santa Cruz province, southern Argentina. The project comprises approximately 550 square kilometres of contiguous licences in the prolific Deseado Massif region, roughly 45 km from Anglo Gold's Cerro Vanguardia mining camp. The El Pantano project is subject to an exploration and joint venture (JV) agreement with private Argentinean company Deseado Dorado SAS and its shareholders, the details of which were announced on Feb. 15, 2022. The company has earned a 51-per-cent interest in the El Pantano project and must spend an additional $2-million (U.S.) in the two years from Feb. 14, 2025, in order to earn 100-per-cent ownership. The company has been carrying out regional exploration at El Pantano for several years, including geological mapping, geochemical sampling, ground magnetics and induced polarization geophysical surveys. These work programs have provided evidence suggestive of major rift-related low sulphidation epithermal system, of the type that has led to the development of major gold and silver deposits in the region. Drill permits for El Pantano were obtained late in 2024, and the company is now finalizing drill contracts with a view to commencing drilling in mid-October, 2025, the first drill program that has ever been undertaken anywhere on the property. Between 10 and 14 diamond holes are planned for a total of approximately 3,000 m, targeting geological structures and geochemical/geophysical anomalies identified from previous work. Additional details will be provided once more precise timing is finalized. The area is very remote and largely unpopulated and thus substantial effort has been required to plan and develop the necessary camp and access infrastructure for a drilling program of this size. The Deseado Massif is a major gold producing area in Argentina and thus some necessary downstream infrastructure exists in the region. In particular, an international laboratory company has a fire assay facility in the regional town of Perito Moreno and thus a short assay turnaround time (for gold and silver) is anticipated. Orosur chief executive officer Brad George commented: "Pepas remains on track and the high bar set by the early holes continues to be cleared on a regular basis. In the meantime, we are excited to be getting close to opening a second drilling front on our El Pantano project in Argentina. Early stage, but this is elephant country, and we like what we have seen thus far." Colombia -- Anza project The Anza project is now 100 per cent owned by the company following completion of a share purchase agreement (SPA), announced Nov. 28, 2024, whereby the company purchased all of the shares of its previous JV partner; Minera Monte Aguila (MMA). The project, which is located 50km west of Medellin, is easily accessible and boasts excellent infrastructure including water, power and communications as well as a large exploration camp. From September, 2018, to November, 2024, the Anza project was under the control of its previous JV partner MMA, itself a 50/50 venture between the world's two largest gold miners, Agnico Eagle Mines and Newmont Mining. Prospects The company is currently focused on three prospects within the Anza project -- Pepas, Apta and El Cedro. All three prospects are within the same granted exploration title that is broken into two, non-contiguous pieces. Drilling is currently being undertaken at the Pepas prospect in the northern extent of the Anza project (preacquisition) over 10 kilometres north of the central base camp at Apta. In parallel, mapping and sampling is being undertaken over the El Cedro porphyry system in the south of the project area. About Orosur Mining Inc. Orosur Mining is a minerals explorer and developer currently operating in Colombia, Argentina and Nigeria. About the Anza project Anza is a gold exploration project, comprising three exploration licences, and a large number of licence applications, totalling 399 square kilometres, in the prolific Mid-Cauca belt of Colombia. The Anza project is currently wholly owned by Orosur via its subsidiaries, Minera Anza SA and Minera Monte Aquila SAS. The project is located 50 km west of Medellin and is easily accessible by all-weather roads and boasts excellent infrastructure including water, power, communications and large exploration camp. Qualified persons statement The information in this news release was compiled, reviewed, verified and approved by Mr. Brad George, BSc honours (geology and geophysics), MBA, member of the Australian Institute of Geoscientists (MAIG), chief executive officer of Orosur Mining, and a qualified person as defined by National Instrument 43-101. Orosur Mining staff follow standard operating and quality assurance procedures to ensure that sampling techniques and sample results meet international reporting standards. Drill core is split in half over widths that vary between 0.3 m and two m, depending upon the geological domain. One-half is kept on site in the Minera Anza core storage facility, with the other sent for assay. Industry standard QA/QC (quality assurance/quality control) protocols are put in place with approximately 10 per cent of total submitted samples being blanks, repeats or certified reference materials (CRMs). Samples for holes PEP-001 to PEP-011 were sent to the Medellin preparation facility of ALS Colombia Ltd., and then to the ISO 9001 certified ALS Chemex laboratory in Lima, Peru. Samples from PEP-012 onward are sent to Medellin laboratory of Actlabs for preparation and assay. Thirty-gram nominal weight samples are then subject to fire assay and AAS analysis for gold with gravimetric refinish for overlimit assays of greater than five g/t. ICP-MS ultratrace level multi-element four-acid digest analyses may also undertaken for such elements as silver, copper, lead and zinc Gold intersections are reported using a lower cut-off of 0.3 g/t Au over three m. Intersections are quoted as down hole thicknesses. True thicknesses are unknown. We seek Safe Harbor.