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Crystal Peak Mine (Crystal Mine; Quartz Knob occurrence; Unnamed Quartz mine [1]), Quartz Knob, Dog Valley District, Sierra Co., California, USA

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Latitude & Longitude (WGS84): 39° 35' 45'' North , 120° 4' 36'' West
Latitude & Longitude (decimal): 39.59581,-120.07672
GeoHash:G#: 9r49784y3
Locality type:Mine
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.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

Cuprotungstite
Formula: Cu2(WO4)(OH)2
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.
Quartz
Formula: SiO2
Colour: Yellow
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
'Quartz'4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Cuprotungstite'7.GB.15Cu2(WO4)(OH)2

List of minerals arranged by Dana 8th Edition classification

Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
Basic Anhydrous Molybdates and Tungstates
Cuprotungstite48.3.2.1Cu2(WO4)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H CuprotungstiteCu2(WO4)(OH)2
OOxygen
O CuprotungstiteCu2(WO4)(OH)2
O QuartzSiO2
SiSilicon
Si QuartzSiO2
CuCopper
Cu CuprotungstiteCu2(WO4)(OH)2
WTungsten
W CuprotungstiteCu2(WO4)(OH)2

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Symons, Henry Heilbronner (1940), Quartz gem stones of California: Rocks & Minerals: 15: 39-44.
U.S. Bureau of Mines Minerals Yearbook for 1957 (1958): volume 3.
U.S. Bureau of Mines Minerals Yearbook for 1958 (1959): volume 3.
U.S. Bureau of Mines Minerals Yearbook for 1959 (1960): volume 3.
U.S. Bureau of Mines Minerals Yearbook for 1960 (1961): volume 3.
U.S. Bureau of Mines Minerals Yearbook for 1961 (1962): volume 3.
U.S. Bureau of Mines Minerals Yearbook for 1962 (1963): volume 3.
U.S. Bureau of Mines Minerals Yearbook for 1963 (1964): volume 3.
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: 338, 350.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10111129 & 10286949.
U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060910568.

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