Angkor Resources Corp. (TSXV: ANK OTCQB: ANKOF) announced on October 13, 2026, the results of a scientific study of drill core from the Thmei North target on its Andong Bor mineral exploration license in northwest Cambodia. The study, conducted by the Economic Geology Laboratory at Kyushu University in Fukuoka, Japan, together with the Institute of Technology of Cambodia in Phnom Penh, found that the alteration and mineralization at Thmei North exhibit the characteristics of a porphyry copper-molybdenum system—the type of deposit that supplies most of the world's copper—and indicate potential for such a deposit. The findings are consistent with the modified copper porphyry model the company is using to guide its drilling, in which the best mineralization is found within potassic-altered sediments adjacent to feldspar porphyry diorite dikes, as outlined in ANGKOR RESOURCES DRILLS INITIAL PROGRAM AT ANDONG BOR COPPER-GOLD TARGET, CAMBODIA - Angkor Resources Corp. The study also identifies which parts of the system are most favorable for copper, giving the exploration team a clearer guide for placing the remaining 1,700 meters of drilling planned in early 2027.
The study examined core from the Thmei North drill holes, identifying three stacked alteration zones typical of a copper porphyry system. Potassic alteration at depth formed from the earliest and hottest fluids and is where most of the copper was deposited. Chlorite-serite alteration later overprinted part of the potassic zone, preserving the earlier copper and adding more. Phyllic alteration near the top formed from later, more acidic fluids that appear to have broken down the earlier copper minerals, and this zone appears to lack mineralization. Copper minerals are mainly chalcopyrite, occurring in veins in both the diorite and the surrounding hornfels, and also disseminated through the diorite. Molybdenite, the main ore mineral of molybdenum, was identified within the copper-bearing zone. Fluid inclusions measured temperatures of 300 to 415 degrees Celsius for the main copper-bearing veins, and evidence of boiling was found, a process commonly associated with metal deposition in porphyry systems. The study's conclusion that copper is concentrated in potassic-altered rock is consistent with assay results previously reported by the company, including 108 meters of 0.53% copper equivalent and 46 meters of 0.51% copper equivalent, both in potassic-altered rock, as detailed in ANGKOR CONFIRMS 108 METRES OF 0.53% COPPER EQUIVALENT AT ANDONG BOR, CAMBODIA, December 13, 2022. Dennis Ouellette, VP Exploration, commented, "This study supports what we have been seeing in the core. The copper is in the potassic and chlorite-sericite alteration, while the phyllic zone near the top appears to lack it. That tells us where to aim the next phase of drilling at Thmei North." The study does not address the size, grade, or economic viability of the target, and the company has not established a mineral resource on the license. The remaining 1,700 meters of the 2,800-meter program will be drilled in early 2027, following the 1,099 meters completed in mid-July 2026, with holes continuing to be drilled to the east and placed using the study's alteration model to test the potassic and chlorite-serite zones at depth. For more information, visit angkorresources.com. The study was led by Sokvireak Say of Kyushu University and the Institute of Technology of Cambodia, with contributions from Kotaro Yonezu, Akira Imai, and Akane Ito of Kyushu University, John C. Menzies of Cmi Capital Limited, and Reach Sam of Angkor Resources. This partnership supports the company's commitment to building Cambodia's national capacity in geoscience. Detailed tables and figures from the study, such as Table 1: Alteration zones at Thmei North and their relationship to copper. and Table 2: Vein sequence at Thmei North, from earliest to latest., provide further scientific context. This news is significant for the mining industry as it validates the exploration model at Andong Bor and could lead to a major copper discovery in Southeast Asia, a region that hosts several porphyry deposits within the Loei Fold Belt.
