Region West, Southwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area New Mexico Mines Database Mines and Districts with Alunite Occurrences.
Identified resources Unknown.
Production Unknown.
Status None.
Estimated resources Unknown.
Geologic maps Darton (1916), scale 1:83,000; Kuellmer (1956), scale 1:126,720.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Acid-sulfate alteration, original host rhyolite, could have structural control.
Deposits Rattlesnake Canyon (MRDS dep_id: 10062629).
Evidence from mineral occurrences MRDS.
Geochemical evidence Hydrothermal altered lithic tuff is more kaolinitized than alunitized. The kaolin mineral is dickite; a small amount of jarosite accompanies alunite (Hall, 1978).
Geophysical evidence Unknown.
Evidence from other sources Hall (1978) did not consider this a promising commercial prospect.
Comments These acid sulfate altered areas have been known because of their implications in porphyry Cu exploration. However, they are best modeled as paleo-geothermal systems (hot springs). Anomalous Au, Ga, and other elements are found in these areas. Detailed alteration mapping coupled with mineralogy and geochemistry are critical in understanding these systems and determine if they are potential resource for alunite (Al), Au, Ga, Ge, and other critical elements.
Cover thickness and description Exposed at the surface.
Authors Virginia T. McLemore.
New data needs Detailed alteration mapping, chemistry, mineralogy.
Geologic mapping and modeling needs Alteration mapping.
Geophysical survey and modeling needs High resolution, Rank 1 aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar complete.