Hilltop Mine (Hand Mine; Kasper tunnel; Gray Mine; Dunn shaft; Blacksmith shaft; Rhem adit), Rustler Park, California District, Chiricahua Mts, Cochise Co., Arizona, USA
|Latitude & Longitude (WGS84):||31° 59' 7'' North , 109° 17' 25'' West|
|Latitude & Longitude (decimal):||31.98528,-109.29028|
|Köppen climate type:||BSk : Cold semi-arid (steppe) climate|
A former small surface and underground Pb-Zn-Ag-Cu-Au-Mo-W-As-Cd mine located in secs. 33 & 34, T16S,R30E and secs. 3,4,5, T17S,R30E (Rustler Park 7.5 minute topo map), 6 miles NW of Paradise, about 26 miles S of San Simon, and near Gleeson and near Hand's Pass. Discovered 1880. First produced 1881. The Hidden Treasure claim was first located in the district - now part of the Hilltop Mine. Owned at times by the Hilltop Silver Lead Mines Co.; Hilltop Metals Mining Co.; Piedmont Mines, Inc.; American Zinc, Lead, and Smelting Co.; and operated by the Queen Mining Co. (1973).
Mineralization is in fissure veins and in irregular replacement lenses and bodies in banded and tilted, silicified Mississippian to Permian limestones and older quartzites. Ores are base metal sulfides and carbonates with wulfenite, often argentiferous, and scheelite. The ore zone is 33.53 meters long and 15.24 meters wide. This mine is famous for the fine and abundant wulfenites it produced. Ore control was in part due to brecciation along faults and fissures in the quartzite and limestone. Locally pipes of massive sulfides (1-6 feet diameter) follow fractures into limestone for distances of up to 50 feet.
Local structures include NE-SW faults.
Workings are extensive, including several tunnels, open cuts, and short adits. They total some 6,096 meters in length and 457.2 meters deep. The Kasper Tunnel is 3,000 feet long with 6,000 feet of workings; the Gray Tunnel is 2,000 feet long with 3,000 feet of workings; the Rhem tunnel is 3,700 feet long with 3,000 feet of workings. A total of some 30,000 tons of base metal sulfide ore was produced intermittently from the early 1910's to about 1954. Best production years were 1924 - 1927.
Shipments were made by burro & wagon in the 1880'S. Several carloads of ore were shipped to El Paso in 1902-1906. About 30,000 tons of base metal sulfide ore produced from the early 1910'S to about 1954.
Mindat ArticlesHilltop Mine, Chiricahua Mountains Arizona by Rolf Luetcke
38 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
|Campanian - Oxfordian|
72.1 - 163.5 Ma
|Cretaceous to Late Jurassic sedimentary rocks with minor volcanic rocks|
Age: Mesozoic (72.1 - 163.5 Ma)
Stratigraphic Name: Temporal Formation; Bathtub Formation; Sand Wells Formation; Fort Crittenden Formation; McCoy Mountains Formation
Description: Sandstone and conglomerate, rarely forms prominent outcrops; massive conglomerate is typical near base of unit and locally in upper part. These deposits are nonmarine except in southeastern Arizona, where prominent gray marine limestone (Mural Limestone) forms the middle of the Bisbee Group. Sandstones are typically medium-bedded, drab brown, lithic-feldspathic arenites. Includes Bisbee Group (largely Early Cretaceous) and related rocks, Temporal, Bathtub, and Sand Wells formations, rocks of Gu Achi, McCoy Mountains Formation, and Upper Cretaceous Fort Crittenden Formation and equivalent rocks. (80-160 Ma)
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.