Organ Mountains
Deposit type & geology
Gold-bearing veins in Precambrian rocks, along the Torpedo-Bennett fault; the district is otherwise a base-metal (Cu-Pb-Zn-Ag) producer.
Precambrian rocks of the Organ Mountains.
Age: Not independently confirmed this session.
Structural geology & terrain
Vein/structure orientation: Texas Main Mine N76°E/80°NW plus a cross vein N55°E; concentric metal zoning around the batholith
Named controlling structure: Torpedo-Bennett fault zone (N-S, controls the copper breccia); Organ Mountains Fault Zone (N-trending, east boundary)
Elevation range: 5,141–8,982 ft (Organ Needle, minor source conflict 8,967–9,012 ft)
Dramatic granite spires and needles, technical climbing terrain, now within Organ Mountains-Desert Peaks National Monument.
High-resolution terrain
~6 m/pixel lidar-derived hillshade (USGS 3DEP) — fine enough to reveal old mine workings, waste-rock piles, trenches, and roads the statewide terrain layer can’t show. Toggling to a different district turns this off.
Historical production
~11,435–13,500 oz Au through 1952/1959 (NMGS Guidebook 49; NMBGMR Resource Map 24 gives 11,500 oz, 1849–1972) — nearly all of Doña Ana County's total historic gold production. Most output was pre-1906.
Sources: NMGS Guidebook 49 (McLemore et al.); NMBGMR Resource Map 24; USGS Professional Paper 610 (Koschmann & Bergendahl 1968) researched — see sources
Current status
Historic lode producer; current status not independently verified this session. Much of the range now sits within the BLM Organ Mountains-Desert Peaks National Monument, which would be expected to restrict new mineral entry — flagged as general context, not independently sourced this session.
Recency not verified
Current claim/permit status was not independently researched this session. Much of the Organ Mountains range is now within the BLM-managed Organ Mountains-Desert Peaks National Monument (designated 2014), which generally closes an area to new mineral entry — general public-record context, not independently re-verified against a BLM source this session.
Land ownership & directions
Federal public land administered by the Bureau of Land Management — generally open to mineral entry under the 1872 Mining Law, subject to staking and permitting rules.
Likely largely BLM (Organ Mountains-Desert Peaks National Monument) — not independently confirmed this session. Organ Mountains, east of Las Cruces, Doña Ana County.
See specimen photos (mindat.org) → — this app doesn’t host specimen photos itself; this searches mindat.org’s own mineral-specimen database, which isn’t necessarily specific to this exact district.
This pin is a generalized district/historic-site reference point, not a surveyed claim boundary — routes may cross private or patented inholdings where public access isn’t guaranteed even if a road reaches the site. Backcountry mine areas commonly have unmarked shafts, unstable ground, and no cell service; confirm current access and safety conditions (land manager, county, or landowner) before heading out.
Tailings reprocessing potential
Base-metal-focused district (Cu-Pb-Zn-Ag) with gold as a byproduct of older milling, pre-1906 for most output.
This is a documentary heuristic, not assay data.The tier above is inferred from historic production era, processing method, and ore character already cited elsewhere on this page — nobody has sampled or assayed this district’s tailings as part of this research. Actual recoverable gold content can only be established by physical sampling.
Reprocessing tailings is regulated mining. Disturbing or reprocessing historic mill waste requires the same NM Mining Act permitting as new mining (see the regulatory companion guide), regardless of who currently holds the claim or surface rights — and ownership of the tailings material itself is a separate legal question from mineral rights on the underlying land.
Legacy tailings can be hazardous. Pre-modern processing commonly used mercury (amalgamation) or cyanide (heap leach), and can carry elevated arsenic and other heavy metals — not a casual sampling target, and disturbing contaminated material can carry real environmental liability.
Geologist’s read
A clean, if modest, example of Precambrian-hosted gold in New Mexico — these veins are “valuable chiefly for gold,” unlike most of the state's other Precambrian occurrences (Willow Creek, Gold Hill), which are base-metal deposits with gold as an afterthought. If the National Monument context above is accurate, this is likely a closed door for any new exploration regardless of geology.