| Deposit ID | 10027040 |
|---|---|
| MRDS ID | M001785 |
| Record type | Site |
| Current site name | Randolph Mine |
| Alternate or previous names | Rondolph Claims, Mellgren Group |
| Geographic coordinates: | -110.11233, 31.69069 (WGS84) |
|---|---|
| Relative position | 2 1/2 MI. SW OF TOMBSTONE, ARIZ. |
Political divisions (FIPS codes)
Cochise(county)
Arizona(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Tombstone(quadrangle 1:24,000 scale)
Fort Huachuca(quadrangle 1:100,000 scale)
Nogales(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper San Pedro(hydrologic unit)
San Pedro-Willcox(hydrologic accounting unit)
Middle Gila(hydrologic subregion)
Lower Colorado(hydrologic region)
Federal lands
ST(Federal land areas administered by ST)
| Country | State | County |
|---|---|---|
| United States | Arizona | Cochise |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Gila and Salt River | 20S | 22E | 16 | SE | Arizona |
| Commodity | Importance |
|---|---|
| Silver | Primary |
| Copper | Secondary |
| Lead | Secondary |
| Materials | Type of material |
|---|---|
| Silver | Ore |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite | ||||||
| |||||||
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Shale |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| Rock unit name | Bisbee Group Beds |
| Rock description | Bisbee Group Beds |
| (1) | -110.11233, 31.69069 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | Ne Trending Granodiorite Dikes In Area, One Is Located Near Shaft |
| General form | VEIN |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Tombstone District |
|---|
| Ownership category | Private |
|---|
| Type | Operator |
|---|---|
| Owner | Tombstone Silver Fields Co. |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M001785 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0040030674 |
USBM FILES
USGS BULL. 710, 1920, PL. 5
KEITH, S.B., 1973, ARIZONA BUREAU OF MINES BULLETIN 187, P. 78.
KEITH, 1973, ARIZ. BUR. OF MINES BULL. 187.
| Subject category | Comment text |
|---|---|
| Deposit | SPOTTY SILVER VALUES ALONG AN OXIDIZED FISSURE VEIN CUTTING CRETACEOUS BEDS. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-APR-1972 | Gere, W. | Arizona Bureau of Geology and Mineral Technology | |
| Updater | 01-NOV-1981 | Gest, Don E. | 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.