| Basis for focus area |
Outline of Antimony district from Krahulec (2018b). |
| Identified resources |
Historical production of antimony. |
| Production |
105,000 tons of Sb (Mills and Rupke, 2020). |
| Status |
Past mining. |
| Estimated resources |
A subeconomic Inferred resource is based on the channel samples near the old mines of about 14 million tons at an average grade of 0.75% Sb (Krahulec, 2018b). |
| Geologic maps |
Callaghan (1973), scale 1:125,000; Biek and others (2015), scale 1:62,500. |
| Geophysical data |
Inadequate Rank 4 aeromagnetic coverage. |
| Favorable rocks and structures |
Paleocene limey sandstones of the Flagstaff Formation. |
| Deposits |
Emma-Albion mine (MRDS dep_id: 10154639). |
| Evidence from mineral occurrences |
MRDS; UMOS (Utah Geological Survey, 2021). |
| Geochemical evidence |
The average grade from 486 U.S. Bureau of Mines channel samples is 0.79% Sb, although a 500 lb mine dump sample had 3.7% Sb, 600 ppm As, 4.1 ppm Ag, and 79.2% SiO2 (Krahulec, 2018b). |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Krahulec (2018b), Mills and Rupke (2020). |
| Comments |
Utah's most significant Sb producer on the flank of the geologically and mineralogically diverse and rich Marysvale area, one of the only Carlin-style deposits in the transition zone from Basin and Range to Colorado plateau province. Very little modern research or exploration. |
| Cover thickness and description |
No cover; additional resources may be present below volcanic rocks. |
| Authors |
Albert H. Hofstra. |
| New data needs |
Regional geologic interpretation tying this system into the regional geology. |
| Geologic mapping and modeling needs |
Map digitization. |
| Geophysical survey and modeling needs |
None requested at this time. |
| Digital elevation data needs |
Lidar complete over western half, in progress over remainder. |
