A former Cu occurrence/mine located in sec. 20, T16N, R6W, MDM, 4.3 km (2.6 miles) SW of Cooks Mountain, on the divide between the South Fork Mill Creek and the Middle Fork Mill Creek, on National Forest land. MRDS database accuracy for this location is not stated.

NOTE: The MRDS database file lists this mine as the "Grey Eagle," while Murdoch & Webb (1966) list it as the "Gray Eagle."

Mineralization is a vein Cu deposit hosted in serpentinite. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).

Workings include surface and underground openings to an overall depth of 6.1 meters. They are comprised of open cuts and a 20 foot shaft plus a 200 foot tunnel which does not reach the vein in depth.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Cuprite

ⓘ Native Copper

ⓘ 'Serpentine Subgroup'

ⓘ Tenorite

3 valid minerals.

Detailed Mineral List:

ⓘ Cuprite

Formula: Cu₂O

References:

(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.159

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 157, 360.

ⓘ Native Copper

Formula: Cu

References:

(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.159

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 157, 360.

ⓘ 'Serpentine Subgroup'

Formula: D₃[Si₂O₅](OH)₄

References:

(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.159

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 157, 360.

ⓘ Tenorite

Formula: CuO

References:

(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.159

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 157, 360.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Copper	1.AA.05	Cu
Group 4 - Oxides and Hydroxides
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Tenorite	4.AB.10	CuO
Unclassified
ⓘ	'Serpentine Subgroup'	-	D₃[Si₂O₅](OH)₄

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
O	Oxygen
O	ⓘ Cuprite	Cu₂O
O	ⓘ Tenorite	CuO
O	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
Si	Silicon
Si	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
Cu	Copper
Cu	ⓘ Cuprite	Cu₂O
Cu	ⓘ Native Copper	Cu
Cu	ⓘ Tenorite	CuO

Other Regions, Features and Areas containing this locality

North AmericaContinent

Coast MountainsMountain Range

North America PlateTectonic Plate

California Coast RangesAccretionary Complex
Franciscan DomainDomain
Round Valley BasinBasin

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.

(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.159

Bramel, Hadley R., Heyl, George R., Cox, Manning W., Ransome, Alfred L., Eric, John H., Wyant, Donald G. (1948) Copper in California. Bulletin 144. California State Mining Bureau p.224

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 157, 360.

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

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