| Basis for focus area |
Outline of the Cretaceous Fawn Peak stock and surrounding volcanic rocks, which includes the Mazama porphyry copper system and associated copper and gold prospects and occurrences. |
| Identified resources |
Historical production of copper, gold, and silver. |
| Production |
American Flag breccia pipe produced a few hundred tons before 1910, with limited production in 1940 (Huntting, 1956). |
| Status |
Past mining. Porphyry exploration 1960 to 1990; 2016 exploration by Blue River Resources Ltd. |
| Estimated resources |
In 1991 potential reserve estimate 454 Mt at 0.4% Cu and 0.34 g/t Au. |
| Geologic maps |
Todd (1995), scale 1:62,500. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Breccia pipes associated with multiphase porphyry copper system. |
| Deposits |
American Flag breccia pipe (MRDS dep_id: 10055965). |
| Evidence from mineral occurrences |
MRDS; Singer and others (2008). |
| Geochemical evidence |
Unknown. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Cover thickness and description |
Exposed. |
| Authors |
Jane M. Hammarstrom. |
| New data needs |
None requested at this time. |
| Geologic mapping and modeling needs |
None requested at this time. |
| Geophysical survey and modeling needs |
None requested at this time. |
| Digital elevation data needs |
Lidar inadequate. |
