en.Wedoany.com Reported - China Gold International Resources Corp. Ltd. (TSX: CGG, HKEX: 2099) released in July 2026 its latest NI 43-101 compliant technical report for the Jiama Copper-Polymetallic Mine in the Tibet Autonomous Region of China. The report shows that the mine's Measured Mineral Resources have surged by 523% compared to previous estimates, increasing from 100 million tons to 623 million tons. Meanwhile, Proven Reserves grew by 1170% year-over-year, reshaping market perceptions of the resource potential of this major domestic copper-polymetallic mine.
China Gold International Resources Corp. Ltd. is a gold and base metals mining company headquartered in Vancouver, Canada, primarily engaged in mineral resource exploration, development, and production in China. The Jiama Mine, located in Maizhokunggar County, Lhasa City, Tibet Autonomous Region, is a super-large porphyry-skarn deposit primarily containing copper, with associated gold, silver, molybdenum, and other polymetals. This resource and reserve update is based on results from continuous exploration and infill drilling over the past several years, marking a major breakthrough in deep and peripheral prospecting at the mine.
According to the latest technical report, the Jiama Mine's Measured + Indicated Resources reached 1.335 billion tons, adding 3 million tons of copper metal, 7.12 million ounces of gold, and 247 million ounces of silver compared to the 2012 estimates. Inferred Resources reached 454.7 million tons, adding 1.74 million tons of copper, 2.72 million ounces of gold, and 116.3 million ounces of silver. The updated Measured Resources have an average copper grade of 0.69% (copper equivalent 1.12%), while Inferred Resources average 0.65% copper (copper equivalent 1.09%), indicating strong development value for the newly added resources.
In terms of reserves, the Jiama Mine's total reserves increased from 440 million tons to 665 million tons, a 51% growth. Among these, underground ore reserves surged from 200 million tons in 2013 to 550 million tons, nearly tripling. With the increase in underground reserves, major metal reserves also rose: copper from 1.47 million tons to 5.2 million tons, molybdenum from 100,000 tons to 220,000 tons, gold from 2 million ounces to 8 million ounces, and silver from 88 million ounces to 354 million ounces. The updated mineral reserves have an average copper grade of 0.86% (copper equivalent 1.40%), making them highly competitive among large porphyry copper mines.
Notably, in this update, open-pit reserves decreased from 240 million tons in 2013 to 110 million tons. The company stated that this is primarily due to normal depletion from years of continuous mining, and the existing two open-pit mining areas can still support over 20 years of production at current mining capacity. Meanwhile, the significantly increased underground reserves will gradually become the main focus of future development at the Jiama Mine, marking a shift in mining focus from open-pit to underground operations. Currently, the Jiama Mine maintains a daily processing capacity of 34,000 tons, and the company plans to restore it to the designed capacity of 50,000 tons per day by 2028. This resource and reserve update provides solid support for this expansion target, and as the mine's lifespan extends further, the Jiama Mine is expected to continue realizing economies of scale.
