Mines and prospects in and around the Farmington Canyon complex, northern Utah (OFR-325)

By: R. W. Gloyn, M. A. Shubat, and B. H. Mayes

Forty-three mines and prospects were examined in the northern Wasatch Mountains of north-central Utah. Areas sampled include the Argenta, Morgan, Farmington, and Hot Springs(City Creek) districts and the Mountain Green area. One-hundred and twenty three samples were collected and assayed for 17 elements including base- and precious-metals and a broad suite of associated elements.

Four ore types were found. From oldest to youngest, the types include: (1) stratabound-copper mineralization in Triassic sandstones and shales, (2) quartzchal-copyrite veins, usually in chloritic shear zones, in the Precambrian Farmington Canyon Complex, (3) disseminated pyrite and chalcopyrite in quartzo-feldspathic gneiss and granite gneiss in the Precambrian Farmington Canyon Complex, and (4) lead-zinc-silver vein or replacement deposits in lower to middle Paleozoic rocks. Types 2 and 3 may be the same age with the difference only due to the amount of structural preparation. Although some of the mines and prospects contained ore-grade mineralization, most are small with very limited tonnage potential.

Other Information:
Published: 1995
Pages: 30 p. + 66 p. appendix
Plates: 6 pl.
Scale: 1:100,000
Location: Davis, Morgan, Salt Lake, Summit, and Weber Counties
Media Type: Paper Publication