Crystal Peak Mine (Crystal Mine; Quartz Knob occurrence; Unnamed Quartz mine ), Quartz Knob, Dog Valley District, Sierra Co., California, USAi
|Regional Level Types|
|Crystal Peak Mine (Crystal Mine; Quartz Knob occurrence; Unnamed Quartz mine )||Mine|
|Quartz Knob||- not defined -|
|Dog Valley District||Mining District|
|Latitude & Longitude (WGS84):||39° 35' 45'' North , 120° 4' 36'' West|
|Latitude & Longitude (decimal):||39.59581,-120.07672|
|USGS MRDS Record:||10111129|
|Köppen climate type:||Csb : Warm-summer Mediterranean climate|
A former silica occurrence/mine and Cu-W occurrence located S of center sec. 10, T20N, R17E, MDM, 0.1 km (0.1 mile) N of Quartz Knob (summit) and 4.3 km (2.7 miles) NNE of Crystal Peak (coordinates of record), ½ mile N of Crystal Peak guard station, on National Forest land. MRDS database stated accuracy for this location is 1,000 meters. Operated during WWII for electronics grade quartz crystals.
Local rocks include Tertiary volcanic flow rocks, unit 17 (Cascade Range).
Workings include surface and underground openings.
Regions containing this locality
Plate - 4,949 mineral species & varietal names listed
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Detailed Mineral List:
| ⓘ Cuprotungstite|
Colour: Yellowish green
Description: Occurs as waxy masses of material in massive quartz.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 338.
Description: Occurs as a few large clear crystals in pegmatite.
Reference: Symons, Henry Heilbronner (1940), Quartz gem stones of California: Rocks & Minerals: 15: 39-44; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 316; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 350.
List of minerals arranged by Strunz 10th Edition classification
|Group 4 - Oxides and Hydroxides|
|Group 7 - Sulphates, Chromates, Molybdates and Tungstates|
List of minerals arranged by Dana 8th Edition classification
|Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES|
|Basic Anhydrous Molybdates and Tungstates|
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
List of minerals for each chemical element
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
|Gelasian - Chattian|
1.806 - 28.1 Ma
|Tertiary volcanic flow rocks, unit 17 (Cascade Range)|
Age: Cenozoic (1.806 - 28.1 Ma)
Description: Tertiary volcanic flow rocks; minor pyroclastic deposits.
Comments: Original map source: Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, GIS Data for the Geologic Map of California, California Department of Conservation, Division of Mines and Geology, CD-ROM 2000-07, scale 1:750,000.
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. 
2.588 - 23.03 Ma
|Cenozoic volcanic rocks|
Age: Neogene (2.588 - 23.03 Ma)
Stratigraphic Name: Columbia River Basalt
Comments: Columbia Plateau
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.