Deposit with commodities copper, gold, silver, turquoise, molybdenum, rhenium
More information at and near this site: Re-AZ00020
| Feature ID | Re-Mo00277 |
|---|---|
| Other names | Pinto Valley |
| Geographic coordinates | -110.964009, 33.410528 |
| Point definition | Approximate center of polygon |
| Polygon definition | Quartz monzonite with greater than 0.4 percent copper |
| Reference | Peterson and others (1951); Plate 3 Date: 1951; Scale: Large (>1:24,000)
|
| Commodities | copper; silver; gold; molybdenum; turquoise; rhenium (1) |
|---|---|
| Valuable materials | Chalcopyrite; native copper; cuprite; gold; molybdenite; molybdite; chalcocite; native silver; turquoise |
| Associated materials | Adularia; allophane; angelsite; apatite; azurite; barite; beidellite; biotite; calcite; canbyite; chalcanthite; chalcedony; chlorite; cimolite; clinozoisite; endellite; epidote; fluorite; galena; goslarite; gypsum; halloysite; hydrous mica; ilmenite; jarosite; kaolinite; leucoxene; libethenite; limonite; magnetite; malachite; metatorbernite; oligoclase; opal; orthoclase; pyrite; quartz; rutile; sericite; wulfenite; wavellite; zircon |
| Mineralization style | veins; grains |
| Age of mineralization | 59.1 Ma (2) |
| Host rock age | Devonian; pre-Cambrian; Mesozoic; Tertiary |
| Host unit name | Pinal schist; Martin limestone |
| Host lithologies | quartz monzonite; granite porphyry; granodiorite; schist; limestone |
| Alteration | propylitic; sericitized;sericitization; oxidation |
| Reference | Peterson, N.P., Gilbert, C.M., and Quick, G.L., 1951, Geology and Ore Deposits of the Castle Dome Area, Gila County, Arizona: U.S. Geological Survey Bulletin 971, 134 p. |
| Additional references | (1) John and Taylor (2016); (2) Kirkham (2013) |
“The copper mineralization of the Castle Dome deposit is confined mainly to the quartz monzonite, which occurs in an uplifted block about 1 by 1.5 miles in size. The hypogene minerals consist of pyrite, chalcopyrite, and a little molybdenite, sphalerite, and galena, together with products of the hydrothermal alteration of the host rock. Pyrite and chalcopyrite are disseminated or occur in small, closely spaced quartz veins striking east-northeast and dipping steeply to the south.”; “The localization of the ore was due to the combined effects of three geologic controls: (1) zoning of the hypogene mineralization, (2) the rich hypogene mineralization associated with the diabase sills, and (3) supergene enrichment.”
Peterson, N.P., Gilbert, C.M., and Quick, G.L., 1951, Geology and Ore Deposits of the Castle Dome Area, Gila County, Arizona: U.S. Geological Survey Bulletin 971, 134 p.
| Type | Model | Reference |
|---|---|---|
| Deposit model | Porphyry Cu-Au | John, D.A., and Taylor, R.D., 2016, By-Products of Porphyry Copper and Molybdenum Deposits in Verplanck, P.L., and Hitzman, M.W., (eds), 2016, Rare Earth and Critical Elements in Ore Deposits: Society of Economic Geologists, Inc., Reviews in Economic Geology, Volume 18, p. 137-164. |
| Geoenvironmental model | Porphyry Cu | du Bray, E.A., 1995, ed., Preliminary compilation of descriptive geoenvironmental mineral deposit models: U.S. Geological Survey Open-File Report 95-831, 272 p. |
| Date | Description | Class | Type | Material | Contained | Units |
|---|---|---|---|---|---|---|
| 1929 | Reserve | ore | copper | 320,000,000 | pounds |
| 1929: Reserve, | |
|---|---|
| Year of estimate | 1929 |
| Resource description | Reserve |
| Material | copper |
| Material type | ore |
| Material amount | 20,000,000 |
| Amount units | tons |
| Grade | 0.8 |
| Grade units | percent |
| Contained commodity | 320,000,000 |
| Contained commodity units | pounds |
| Material amount SI | 20,000,000 |
| Material amount SI units | metric tons |
| Grade SI | 0.8 |
| Grade SI units | percent |
| Contained commodity SI | 150,000 |
| Contained commodity SI units | metric tons |
| Short reference | Peterson and others (1951)Page 64 |
| Reference | Peterson, N.P., Gilbert, C.M., and Quick, G.L., 1951, Geology and Ore Deposits of the Castle Dome Area, Gila County, Arizona: U.S. Geological Survey Bulletin 971, 134 p. |
| Dates | Status | Detail | Reference |
|---|---|---|---|
| 1924 to 1941 | Exploration | Drilling | Peterson and others (1951) |