Corkscrew Canyon Mine (Corkscrew Mine), Ryan, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
|Latitude & Longitude (WGS84):||36° 22' 40'' North , 116° 45' 36'' West|
|Latitude & Longitude (decimal):||36.37778,-116.76000|
|Other regions containing this locality:||Death Valley National Park, California/Nevada, USA|
|Köppen climate type:||BWh : Hot deserts climate|
A former borate mine located in the center N½ sec. 21, T26N, R2E, SBM, 10.1 km (6.3 miles) NW of Ryan, in Furnace Creek Wash at the mouth of Corkscrew Canyon, E flank of the Black Mountains, on National Park Service wilderness land (Death Valley National Park/Death Valley Wilderness). Owned by the U.S. Borax and Chemical Co. (1976). MRDS database stated accuracy for this location is 1,000 meters.
The entrance to this site is through a locked gate east on Route 190 about 1-1/4 miles beyond the exit road from Twenty-Mule-Team Canyon. Mine workings found here alongside a wash consisted of several adits, a huge wooden four-chute ore bin, and an adjacent platform loading area. Activity here was all underground.
Mineralization is a Miocene borate deposit (Mineral occurrence model information: Model code: 260; USGS model code 35b.3; Deposit model name: lacustrine borates), hosted in rocks of the Furnace Creek Formation (mudstone, shale, sandstone, limestone). The ore body is 548.64 meters long and has a depth-to-top of 0.0 meters. The borate-bearing zone is about 1,800 feet long. The colemanite is massive and cavernous. Basalt occurs in the footwall; tuffaceous mudstone and sandstone occur in the hanging wall. Local rocks include Tertiary nonmarine rocks, undivided.
Workings include unspecified underground workings.
Reserve-Resource data are found in: Evans, James R., G.C. Taylor, and J.S. Rapp (1976).
Reserves and resources data: Type: in-situ: Estimate year: 1976; total resources: 172,000 metric tons of ore.
Assay results: B2O3: 31 weight per cent B (1976). 50% of these reserves were considered to be recoverable.
11 valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.
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
|Pliocene - Paleocene|
2.588 - 66 Ma
|Tertiary nonmarine rocks, undivided|
Age: Cenozoic (2.588 - 66 Ma)
Stratigraphic Name: Avawatz Formation; Bealville Fanglomerate; Caliente Formation (part); Goler Formation; Old Woman Sandstone; Titus Canyon Formation; Violin Breccia; Walker Formation; Witnet Formation
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.