Last Chance Mine, Ruby Hill, Conconully Mining District, Okanogan County, Washington, USAi

Regional Level Types
Last Chance Mine	Mine (Inactive)
Ruby Hill	Hill
Conconully Mining District	Mining District
Okanogan County	County
Washington	State
USA	Country

The Ruby claim was staked by John Clunan and James Milliken in October of 1886 along with the adjacent Poorman and Fairview claims on the same vein. It was named for pyrargyrite, also know as ruby silver, which was found there

George Bethune, the Washington State Geologist, reported on the property in 1890. His review was very optimistic for the mine to become a major producer. In his report the following year, however, he reviewed nearly all the surrounding claims but made no mention of any developments at the Ruby claim.

Bethune noted in his 1890 report that as part of his state collection of ores, he had obtained beautiful specimens of cuprite and native silver from the Ruby claim.

At some point, the Ruby claim changed hands and became the Last Chance mine which is the name that appears on current topo maps. The workings are caved in and flooded.
Structure: The Quartz Monzonite Was Probably Emplaced In A Magmatic Arc.

Geology: The vein is in granodiorite of cretaceous age near the contact with hornblende-biotite schist of the metamorphic complex of conconully (gulick and korosec, 1990, geol. Map).

Rock formation(s): Conconully Granodiorite;Metamorphic Complex Of Conconully


Ore(s): The Quartz Fissure Vein That Averages 12 Feet In Width Strikes S50e And Dips 70sw. Ore Minerals Are Concentrated In Ore Shoots That Are 2-4 Feet Thick And As Much As 200 Feet Long. Ore Minerals Are Sparsely Disseminated Between Ore Shoots (Moen, 1973, P. 18).

Other Databases

Link to USGS MRDS:	10099366

Other Regions, Features and Areas containing this locality

References