|Latitude & Longitude (WGS84):||35° 50' 31'' North , 115° 29' 47'' West|
|Latitude & Longitude (decimal):||35.84194,-115.49639|
|Köppen climate type:||BWk : Cold desert climate|
A former Zn-Pb-Cu-Au-Ag-V mine located in sec. 20 & 29, T24S, R58E, MDM, 5.7 km (3.5 miles) W of Goodsprings and ESE of Shenandoah Peak, on Bureau of Land Management land. Discovered in 1889. First production was in 1909. Owned by A. J. Robbins (1922). MRDS database stated accuracy for this location is 10 meters.
Mineralization is a Pliocene deposit (Mineral occurrence model information:
Model code 72; USGS model code 19a; Deposit model name: Polymetallic replacement; Mark3 model number 47), hosted in dolomite of the Bird Springs Formation. The ore body strikes approximately NW and dips approximately SW at a thickness of 1.52 meters, a width of 12.19 meters, and a length of 274.32 meters. Controls for ore emplacement included the permiability of the formation. The zinc-bearing dolomite breccia is associated with sill-like masses of granite porphyry which intruded the Bird Springs Formation. Local rocks include Limestone and minor amounts of dolomite and shale.
Regional geologic structures include regional overthrusting. Faults in the district tend to make a reticulate pattern. Local structures include folding and faulting.
Workings include underground openings with a length of 152.4 meters and an overall depth of 207.26 meters.
Production data are found in: Hewett (1931).
Assay data results: Year: 1924 (period 1909 - 1924): ^30-42% Zn.
14 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
|Quaternary - Miocene|
0 - 23.03 Ma
|Cenozoic sedimentary rocks|
Age: Cenozoic (0 - 23.03 Ma)
Lithology: Sedimentary rocks
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. 
|Cisuralian - Pennsylvanian|
272.3 - 323.2 Ma
|Carbonate Shelf Sequence - Limestone, dolomite, siltstone, sandstone, and shale|
Age: Paleozoic (272.3 - 323.2 Ma)
Description: Present in Elko, White Pine, Lincoln, and Clark Counties. This unit represents mostly Upper Pennsylvanian and Lower Permian rocks that have not otherwise been separated into units Psc or IPMbc. Unit includes unnamed Pennsylvanian and Lower Permian limestone and sandstone beds in Lincoln County, the Bird Spring Formation in Clark County, the Riepe Spring and Ely Limestones (undivided) in White Pine County, and limestone and dolomite rocks not otherwise assigned in Elko County. This unit lies depositionally below unit Psc and above the Ely Limestone (IPMbc) where it is mapped separately. Where unit IPMbc is not mapped separately in southern Nevada, the unit lies directly on Mississippian carbonate (Mc) and in White Pine County it rests on undivided Chainman and Pilot Shales and Joana Limestone (shown as either unit IPMcl or MDcl).
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.