History · Geology
About Daheishan Mine
The Daheishan Molybdenum Mine in Jiaohe County, Jilin Province, is one of China’s largest molybdenum producers and an active porphyry-type Mo deposit operating continuously since 1958. The mine completes the major Chinese Mo coverage triad alongside Stage-19/20’s Dexing (Cu-Mo porphyry, Jiangxi) and Batch-21’s Jinduicheng (Mo-only, Shaanxi) and Sandaozhuang (W-Mo skarn, Henan). Daheishan establishes Jilin as the encyclopedia’s 14th Chinese province with a published locality entry.
Geology & Signature Specimens
Mineralization is hosted in Late Yanshanian granitic porphyry intrusions emplaced into Permian and Triassic sediments. The deposit hosts disseminated and stockwork-veined molybdenite distributed through a fractured felsic intrusion, with minor associated chalcopyrite, pyrite, and fluorite. Reserves exceed 280,000 tonnes contained Mo. Collector specimens favor sharp hexagonal molybdenite tablets on quartz-pyrite-fluorite matrix; the Daheishan fluorite associations distinguish it visually from drier porphyry deposits.
