Burro Mountains Placer District — Grant County

McLemore (1994) lists Burro Mountains among 36 New Mexico mining districts containing placer gold (NMBGMR Resource Map 24, district DIS046). Estimated placer production: minor or unrecorded placer production from 1828–1991 statewide context (662,000 oz total NM placer production). Production period: 1879-present. District cumulative production (all commodities): >$2,000,000,000. Deposit types: placer gold, porphyry copper, polymetallic vein, episyenites (metasomatites), epithermal manganese, epithermal manganese, pegmatite, tungsten veins, volcanic-epithermal vein. Also known as: Tyrone, Cow Springs, Bald Mountain, Big Burro Mountain, Burris, Burro Peak, California Gulch, Cow Spring, Gold Gulch, Iron Gulch, Leopold, Oak Grove, Sulphuret Canyon. In 2015, 84 mill pounds Cu produced and 13 million metric tons leaching reserves of 0.42% Cu at Tyrone (NMGR0084). Placer gold occurs as native gold and electrum in incised valleys and alluvial fans. Most economic placers were discovered by 1900; recreational panning may find fine colors — verify land status before prospecting. Coordinates approximate the district centroid from NMBGMR Resource Map 24 GIS (DIS046).