Mineral Hill Group, Conconully Mining District, Okanogan County, Washington, USAi

Regional Level Types
Mineral Hill Group	Claim
Conconully Mining District	Mining District
Okanogan County	County
Washington	State
USA	Country

Structure: Post-Metallization Shearing In Wallrock

Alteration: Wallrock Adjacent To The Vein Has Been Hydrothermally Altered.

Commodity: Produced flotation concentrates 1938-1939 of unknown quanity

Deposit: 13 patented claims: NEW jersey, NEW york, frankie boy, oregon, california, washington, idaho, virginia, nevada, florida, columbia, thompson, and montana. The claims were patented by bridgeport mining and milling co. In 1896. Ore minerals concentrated into ore shoots to 1 ft wide that parallel the vein walls; the frankie boy vein is the richest vein and consists of 1 ft of white granular quartz, and contains scattered grains and lenses of ore minerals. The frankie boy vein strikes n35e and dips 60nw. The mo occurs in a mo-bearing pegmatite dike that is 100 ft thick. The dike varies in character from place to place. The mo occurs As thin flakes and radial noduals about 0.25 in. In diameter. In the lowest adit, elevation 2300 ft, one vein is 11 ft wide and strikes n05 W and dips 46w; the second vein has a parallel strike, but dips more steeply to the west than the first. At the face in the north drift, in the second vein, the vein is about 5 ft wide.

Development: Adits, drifts, and shafts; development and exploration in 1957, 1959, 1969, and 1970. In 1896 a shaft was sunk on the columbia claim, and small shipments of high-grade Ag ore were made; however uch of the ore was only milling grade and could not be shipped to distant smelters at a profit. In 1902, mineral hill mining co. Was formed to develop the deposits. An adit was started on the columbia vein, and by 1906 the vein had been drifted upon for about 1000 ft. In 1937 a 20 ton flotation mill was built near the portal of the columbia adit, and during 1938-1939 small amounts of pb-ag concentrates were produced. Since 1940 several companies have undertaken limited development work at the wheeler mine.

Geology: Geol.desc: white, granular quartz

Ore(s): Quartz Fissure Vein

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Link to USGS MRDS:	10041533

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References