| Lat / long: | 38.9488, -119.22181 |
| Primary: | Copper |
| Secondary: | Gold, Silver |
| Tertiary: | Gypsum-Anhydrite, Iron |
| Ore: | Chalcocite, Chalcopyrite, Malachite |
| Gangue: | Calcite, Chlorite, Garnet |
| Orebody form: | IRREGULAR LENSES |
| Discovery year: | 1865 |
| Operation type: | Unknown |
| Deposit type: | Sedimentary |
| Production size: | Large |
| Development status: | Past Producer |
| First production started: | 1870 |
| Host type: | Limestone |
| Associated rock: | Yerington Batholith;Yerington Batholith |
| Associated type: | Rhyolite |
| Structure: | Yerington Batholith Responsible For Dist. Of Metasomatic Rocks And Zoning Of Mineral Assemblages. Qtz. Monzonite Porphyry Dike Swarms Within Central Portion Of Batholith Formed Porphyry Cu Deposits, Series Of Faults And Cross-Faults Adding Considerable Complexity To Profound Metamorphism |
| Alteration processes: | Albitic, Sericitic, Propylitic, Weak Potassic, Oxidation |
| MRDS | M035865 |
| DEP | 10103617 |
| Reference | {Deposit:: KNOPF, A., 1918 , GEOLOGY AND MINERAL DEPOSITS OF THE YERINGTON DISTRICT, NEV., USGS PROF. PAPER NO. 114 .}{Deposit:: ARCHBOLD, N. L., 1969 , GEOLOGY AND MINERAL DEPOSITS OF LYON, DOUGLAS, ORMSBY CO, NEV., NEV. BUREAU OF MINES, BULL. 75 .}{Deposit:: RANSOM, F. L., 1910 , MINING AND SCIENTIFIC PRESS.}{Deposit:: EINAUDI, M. T., 1977 , PETROGENISIS OF THE CU-BEARING SKARN AT THE MASON VALLEY MINE, YERINGTON DIST., NEV., ECONOMIC GEOLOGY, VOL. 72 NO. 5 .}{Deposit:: 1910 RECON RANSOME, F. L., MINING AND SCIENTIFIC PRESS}{Deposit:: 1918 GEOLMAP KNOPF, A. PROF. PAPER NO. 114}{Deposit:: 1969 RECON NEV. BUREAU OF MINES, BULL. 75}{Deposit:: 1977 RECON EINAUD, M. T., STANFORD GEOLOGICAL SURVEY, ECON. GEOL. VOL. 72 , NO. 5 .}{Production:: COUCH, CARPENTER, 1943 , NEV. METAL AND MINERAL PRODUCTION, UNIV. OF NEV. BULL., VOL. 27 , NO. 4} |
| Reporter | Fiebelkorn, J. B. (Stewart, J. H.) |