Buffalo Mine Group

Mining District and Mines

Harshaw District - Northeastern Patagonia Mountains ¹

Buffalo Mine Group, (Lead Queen, Golden Rose, Jefferson Group, Wieland Group, Jefferson mg. Co., Mumme Mg. Co.)¹.

[3]

Location

T: 22S; R: 16E; NW¼ 33¹

31.4848, -110.7204²

Mineral Products

Pb, Ag, Zn, Cu, Au- (Ba)¹

Geology

Narrow quartz-barite veins, containing rich, oxidized lead-silver ore in the upper part and mixed argentiferous lead, zinc and copper sulphides at depth. Wall rocks are Cretaceous andesite and rhyolite volcanics.¹

Type of Operation and Production

Tunnel and shaft operations. Produced some 500 tons of ore averaging 21% Pb, 20 oz. Ag/T, 3% Zn, 2% Cu, and minor Au prior to 1900. Few tons produced in the 1900s.¹

References

1. Index of Mining Properties in Santa Cruz County, Arizona, by Staton B. Keith, Bulletin 191, Arizona Geological Survey, 1975. Page 73.
2. Mike Bertram 2/19/23
3. The Mineral Deposits of the Santa Rita and Patagonia Mountains of Arizona, by Frank Schrader (1915) republished by Kerby Jackson under the title of Mining in the Santa Rita and Patagonia Mountains of Arizona. The report is available in electronic form in Google Books, and can be searched. The illustrations have not been found with the article, but are available on the USGS site.