Tortugas Mountains

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 barite and fluorite.
Production Estimated 100 short tons barite and 20,751 short tons fluorite from the Tortugas Mountain district.
Status Past mining, no current activity.
Estimated resources Unknown.
Geologic maps New Mexico Bureau of Geology and Mineral Resources (2003), scale 1:500,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Limestones and shales of the Magdalena Group have been shattered extensively and tilted westward. Fluorspar veins occur in the fractures caused by block faulting, and trend generally north or northwest. They are predominantly fissure fillings, but include some fillings of fault breccia (Rothrock and others, 1946).
Deposits Tortugas mine (MRDS dep_id: 10012973).
Evidence from mineral occurrences MRDS; New Mexico Mines Database (McLemore and others, 2005).
Geochemical evidence Average assays of ore was 77.41% CaF2, 15.68% CaCO3, and 6.51% SiO2 (Rothrock and others, 1946).
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Exposed at the surface.
Authors Virginia T. McLemore.
New data needs This area needs detailed 1:12,000 mapping, chemistry, alteration mapping, geophysics.
Geologic mapping and modeling needs Detailed geology-structure-alteration-mineralization mapping.
Geophysical survey and modeling needs High resolution aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar complete.