Black Range deposits (Lake Valley-Hermosa-Tierra Blanca-Macho-Kingston districts)

Region West, Southwest
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Mining district boundaries from McLemore (2017).
Identified resources Historical production of copper, gold, lead, manganese, molybdenum, silver, tungsten and zinc.
Production Historical production: Lake Valley district (1878-1957): 100,000 lbs Cu, 6,126,000 oz Ag, >500,000 lbs Pb, 45,540 long tons of 23% Mn and 57,800 long tons 25% Mn; Hermosa district: 1,850 lbs Cu, 1,250,000 oz Ag, 47,600 lbs Pb, and 8,000 lbs Zn; Tierra Blanca district: 92,784 lbs Cu, 97 oz Au, 165.000 oz Ag, 318.687 lbs Pb, and 464,055 lbs Zn (as well as 10,000 tons WO3); Macho district: 31.4 oz Au, 20,000 oz Ag, 679,000 lbs Pb, and 11,000 lbs Zn; Kingston district: 2,520 long tons of 34-39% Mo ore plus 1,651 long tons of 35 to 40% Mo, 111.950 lbs Cu, 124 oz Au, 6,126,000 oz Ag, 378,820 lbs Pb, and 566,900 lbs Zn (McLemore and Nutt, 2002).
Status Past mining.
Estimated resources Unknown.
Geologic maps O'Neill and others (2002), scale 1:24,000.
Geophysical data See Klein and others (2002).
Favorable rocks and structures Carbonates surrounding Emery caldera.
Deposits Columbia mine (MRDS dep_id: 10013459), Sierra Grande (Bridal Chamber) (MRDS dep_id: 10272486), Sierra Bella (MRDS dep_id: 10248293).
Evidence from mineral occurrences MRDS; McLemore and others (2005); McLemore and Nutt (2002); McLemore (1998).
Geochemical evidence As much as 2,800 ppm Te and 1310 ppm W from Tierra Blanca; see McLemore and Nutt (2002), Korzeb and Kness (1994), Korzeb and others (1995).
Geophysical evidence Klein and others (2002).
Evidence from other sources McLemore and Nutt (2002).
Comments The BLM has developed the Lake Valley historical townsite as a recreation area.
Cover thickness and description Potential for buried deposits.
Authors Virginia T. McLemore.
New data needs Detailed and alteration mapping.
Geologic mapping and modeling needs Lake Valley is mapped in detail, the other mining districts require detailed mapping.
Geophysical survey and modeling needs High resolution, Rank 1 aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar complete.