Magdalena Mining District
Deposit type & geology
Carbonate-hosted replacement Zn-Pb-Cu-Ag deposits with byproduct gold.
Kelly Limestone (Magdalena Group, Mississippian) adjacent to Oligocene stocks.
Age: Anchor Canyon stock ~28.3 Ma, Nitt monzonite stock ~28.0 Ma, and latite porphyry of Mistletoe Gulch (Oligocene).
Structural geology & terrain
Vein/structure orientation: Not independently detailed this session — replacement deposits localized adjacent to Oligocene stocks
Named controlling structure: Not independently confirmed this session
Elevation range: Not independently confirmed this session — Magdalena Mountains, Kelly Gulch headwaters
Magdalena Mountains terrain, Cibola National Forest vicinity.
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
Not itemized for gold in any source found — this is New Mexico's largest MRDS gold-record cluster not on the original 31-district map (28 gold-flagged records, 22 past producers), but the district's real production (the Kelly Mine alone was one of NM's most productive Zn-Pb-Ag mines) is overwhelmingly base-metal, with gold recorded only as a secondary or tertiary commodity in most records (primary in only the small Papa Mine and Crestone Group occurrences).
Sources: NMBGMR RM-24 (McLemore, DIS221); USGS MRDS (Kelly Mine dep_id 10012336 and related Magdalena District records); Mindat (Kelly Mine, Magdalena Mining District); New Mexico Geology v.9 n.1 (fluid inclusion study, Waldo-Graphic mine) researched — see sources
Current status
Inactive as a commercial ore producer since 1957 (Kelly Mine); mineral-specimen collecting reportedly continues on the privately-held Kelly Mine property (40 claims, 578 acres), but this is not equivalent to production or exploration activity. No current claims, permits, or gold-specific exploration identified.
Dormant — no recent activity
No current claims, permits, or exploration activity identified; the Kelly Mine's private-land specimen-collecting operation is mineral-specimen recovery, not commercial ore production.
Land ownership & directions
The district spans more than one ownership type (e.g., patented claims inside BLM or National Forest land) — check the specific parcel, not just the district, before assuming access.
Mixed private (Kelly Mine) and Cibola National Forest (Magdalena Mountains) — not fully confirmed parcel-by-parcel this session. Village of Magdalena, Socorro County, via US-60; Magdalena Mountains, Kelly Gulch area.
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
A century of Zn-Pb-Cu-Ag mining (1878–1961) across multiple mines (Kelly, Graphic, Waldo, Linchburg, Nitt) with gold as a minor, non-itemized byproduct — a long operating history under base-metal-focused, pre-modern milling technology.
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
Added this session after an MRDS spatial sweep flagged it as the largest gold-record cluster not already on this map. It's a genuine, well-documented mining district — but its identity is as one of New Mexico's premier base-metal (zinc-lead-silver-copper) districts, with gold an incidental credit in most individual mine records rather than a district-defining commodity, unlike most of the dedicated gold/placer districts elsewhere on this map.