| Deposit ID | 10060269 |
|---|---|
| MRDS ID | TC10270 |
| Record type | Site |
| Current site name | Four Peaks Mine |
| Geographic coordinates: | -111.3321, 33.67257 (WGS84) |
|---|---|
| Elevation | 1975 |
Political divisions (FIPS codes)
Maricopa(county)
Arizona(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Four Peaks(quadrangle 1:24,000 scale)
Theodore Roosevelt Lake(quadrangle 1:100,000 scale)
Mesa(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Lower Salt(hydrologic unit)
Salt(hydrologic accounting unit)
Salt(hydrologic subregion)
Lower Colorado(hydrologic region)
Federal lands
Tonto National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
Four Peaks Wilderness(Wilderness)
Wilderness FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Arizona | Maricopa |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Gila and Salt River | Arizona |
| Commodity | Importance |
|---|---|
| Quartz | Primary |
| Gemstone | Primary |
| Semiprecious Gemstone | Primary |
| Iron | Secondary |
| Materials | Type of material |
|---|---|
| Amethyst | Ore |
| Hematite | Ore |
| Specularite | Ore |
| Result | GEMS OF 90 CARETS OR MORE FOUND AMONG AMETHYST CRYSTALS. |
|---|
| Host or associated | Associated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite | ||||||||
| Rock unit name | Mazatzal Granite | ||||||||
| Rock description | Mazatzal Granite | ||||||||
| |||||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Metasedimentary Rock > Quartzite |
| Rock unit name | Four Peaks (Mazatzal Group) |
| Rock description | Four Peaks (Mazatzal Group) |
| (1) | -111.3321, 33.67257 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Roof Pendant Of Mazatzal Group Quartzite On Mazatzal Granite Folded Into A Syncline. |
| Type of structure | Local |
| Structure description | Fault |
| Strike | N35E |
|---|---|
| Dip | 59SE |
| Development status | Producer |
|---|---|
| Commodity type | Both |
| Significant | No |
| Discovery year | 1925 |
| Discoverer | Jim Mcdaniels |
| Year of first production | 1942 |
| District name | Four Peaks Mining District |
|---|
| Ownership category | Private |
|---|
| Type | Owner-Operator |
|---|---|
| Owner | Maricopa Mining Corp. |
| First year | 1976 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | TC10270 |
LOWELL, J., 1976, MINERALIZATION OF THE FOUR PEAKS AMETHYST DEPOSIT, MARICOPA COUNTY, ARIZONA: MINERALOGICAL RECORD, MARCH-APRIL 1976, P. 72-77.
JAEGER, F.P., 1985, A VISIT TO THE FOUR PEAKS AMETHYST MINE: GEMS AND MINERALS, NOV. 1985, P. 8-9, 48-49.
ESTRAOA, L., J.J., 1987, GEOLOGY OF THE FOUR PEAKS AREA, ARIZONA: UNPUBLISHED M.S. THESIS, ARIZONA STATE UNIVERSITY, TEMPE, 76 P.
PEIRCE, H.W., 1969, GEM MATERIALS, IN USGS, ABM, AND USBR, MINERAL AND WATER RESOURCES OF ARIZONA: ABM BULLETIN 180, USGS BULLETIN 871, P. 359.
BLAIR, GERRY, 1992, THE ROCKHOUND'S GUIDE TO ARIZONA: HELENA, MONTANA, FALCON PRESS, 165 P.
CIMRI
| Subject category | Comment text |
|---|---|
| Deposit | AMETHYST, HEMATITE, SPECULARITE, AND COLORLESS QUARTZ ENCRUST OPEN SPACE IN FAULT BRECCIA. SEVERAL GROWTH STAGES ARE EVIDENT. SOME BRECCIATION OF MINERALIZATION AND CORROSION HAS OCCURRED. LATE SMOKEY QUARTZ AND FLUORAPATITE PARTLY FILL REMAINING OPEN SPACE. STRUCTURE SAID TO BE A MILE OR SO LONG. MOST AMETHYST CRYSTALS OCCUR AS SINGLES AND AS TERMINATIONS. |
| Deposit | THESE OCCURRENCES ARE REPUTED TO HAVE BEEN KNOWN FROM AT LEAST SPANISH COLONIAL TIMES AND PERHAPS EARLIER; ALSO THAT THE AMETHYST IN THE CROWN JEWELS OF SPAIN ARE FROM FOUR PEAKS. THE MINE IS ON PATENTED GROUND AND COLLECTING AT THIS SITE IS NOT PERMITTED, BUT COLLECTING IS OFTEN DOWN ON ADJACENT LAND IN THE TONTO NATIONAL FOREST. ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV |
| Deposit | Discovery Year: EARLY 1900'S? |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-SEP-1991 | Carbonaro, Marguerite M. (Long, Keith R.) | U.S. Geological Survey | |
| Updater | 01-OCT-1992 | Orris, Greta J. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.