Yarnell Mine, Yarnell, Yavapai Co., Arizona, USA
|Latitude & Longitude (WGS84):||34° 12' 22'' North , 112° 44' 52'' West|
|Latitude & Longitude (decimal):||34.20611,-112.74778|
‡Ref.: Metzger, O.H. (1938), Gold Mining and Milling in the Wickenburg Area, Maricopa and Yavapai Counties, Arizona: US Bureau of Mines Information Circular 6991: 34-39.
Page, T.C., M.A. Miller, P.C. Gibson, and J.D. Sell (1994) Geology and Geochemistry of the Yarnell Gold Deposit. Mining Engineering, September, 1994: 1061-1064.
Yale Peabody GNIS database (NOTE: this database is derived from USGS 1:24,000 topographic map data).
U.S. Bureau of Mines - Arizona Bureau of Geology and Mining Technology file data.
U.S. Bureau of Land Management Arizona Mining Claims Lead File #33458.
USGS 7.5 minute Yarnell topo map.
Arizona Department of Mineral Resources Yarnell Mine file.
MRDS database Dep. ID #10048177, MRDS ID #M800233.
A former underground Au-Ag-Cu-Pb. Discovered by Harrison Yarnell. Produced 1936-1941. Claims also located in sec. 23.
Mineralization is a tabular ore body. Ore control was faulting, shearing and igneous activity. Ore concentration was oxidation at near surface. Alteration was minor sericite along vein walls.
Area structures include veins that trend NE and dip at low angles, usually less than 40 degrees. Foliation in Precambrian metamorphic rocks trends N10E to N25E. Local granitic rocks are unfoliated.
5 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
1400 - 1600 Ma
|Middle Proterozoic granitic rocks|
Age: Calymmian (1400 - 1600 Ma)
Description: Mostly porphyritic biotite granite with large microcline phenocrysts, with local fine-grained border phases and aplite. Associated pegmatite and quartz veins are rare. This unit forms large plutons, including the Oracle Granite, Ruin Granite, granite in the Pinnacle Peak - Carefree area northeast of Phoenix, and several bodies west of Prescott. (1400-1450 Ma)
Comments: ~ 1.4 Ga
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.