|Latitude & Longitude (WGS84):||31° 39' 32'' North , 110° 56' 48'' West|
|Latitude & Longitude (decimal):||31.65889,-110.94667|
|Other regions containing this locality:||Sonoran Desert, North America|
|Köppen climate type:||BSk : Cold semi-arid (steppe) climate|
A Pb-Zn-Ag-Cu-Au-Mo mine located in sec. 30, T20S, R14E, East of Amado in the foothills of the Santa Rita Mountains at 4,224 feet of altitude (main adit). Originally claimed in 1907 but first significant production didn't occur until the 1950's. Owned at times, or in part, by Sheehy; Santa Cruz Silver-Lead Co.; Sunrise Mining Co.; Arivaca Mining Corp.; and the Colorado Fuel & Iron Steel Corp. NOTE: Coordinates updated February, 2008, using a Garmin hand held GPS unit (main adit portal) by Ronald Deblois.
The latest name of this mine was derived from the fact that the best ore lined, or coated, the ends of tubes or ore chimneys, which resemble large fingers, just as a glove would cover the fingers of a hand.
Mineralization is sulfides and quartz deposited in permeable zones at the intersection of a bedding plane fault and favorable beds in Permian Naco Group limestone. Extensive solution of the limestone and deep oxidation concentrated secondary minerals in the leached caverns as sand carbonate ore.
Workings include shaft and adit operations. Worked at various times from about 1911 through 1972. The group produced some 29,260 tons of ore averaging about 22% Pb, 9% Zn, 7 oz. Ag/T, 0.3% Cu, and minor Au.
CAUTION!: This mine is under active claim (2011). Extensive cleanup efforts are currently underway in and around the mine to remove litter and debris from years of visitation. Heavy, reinforced gates have been installed on all of the adits and shafts to protect this historic locality. Recent fire caused by Forest Service contractors has unfortunately destroyed several structures in the mine, making much of the mine impassable. Efforts are also underway to restore ladders and supports in those areas. Once a timeline has been established and progress made in improving the safety of the mine, collecting by permission only may be considered by the claimant. Trespassing for the purpose of collecting is prohibited without the permission of the claim holders.
34 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Miocene - Oligocene|
5.333 - 33.9 Ma
|Cenozoic volcanic rocks|
Age: Cenozoic (5.333 - 33.9 Ma)
Comments: Sierra Madre Occidental
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
|Ypresian - Campanian|
47.8 - 83.6 Ma
|Early Tertiary to Late Cretaceous volcanic rocks|
Age: Phanerozoic (47.8 - 83.6 Ma)
Stratigraphic Name: Williamson Canyon Volcanics
Description: Rhyolite to andesite and closely associated sedimentary and near-surface intrusive rocks; commonly dark gray to dark greenish gray or greenish brown. In the ranges west of Tucson, this unit includes thick welded ash-flow tuffs. Volcanic rocks of this unit are inferred to be derived from vents and volcanoes above magma chambers that solidified to form the granitic rocks of map unit TKg. These rocks are restricted to southeastern Arizona except for a small outcrop near Bagdad. (50-82 Ma)
Comments: Related, broadly, to unit TKg
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.