| Deposit ID | 10048346 |
|---|---|
| MRDS ID | M899933 |
| Record type | Site |
| Current site name | Endless Chain Mine |
| Alternate or previous names | Cunningham Tunnel |
| Related records | 10162245 |
| Geographic coordinates: | -110.72678, 31.43403 (WGS84) |
|---|---|
| Elevation | 1676 |
| Relative position | 2.5 MILES SW OF HARSHAW |
Political divisions (FIPS codes)
Santa Cruz(county)
Arizona(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Harshaw(quadrangle 1:24,000 scale)
Nogales(quadrangle 1:100,000 scale)
Nogales(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Santa Cruz(hydrologic unit)
Santa Cruz(hydrologic accounting unit)
Middle Gila(hydrologic subregion)
Lower Colorado(hydrologic region)
Federal lands
Coronado National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Arizona | Santa Cruz |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Gila and Salt River | 023S | 016E | 17 | E2 | Arizona |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Materials | Type of material |
|---|---|
| Chalcocite | Ore |
| Chalcopyrite | Ore |
| Pyrite | Ore |
| Tetrahedrite | Ore |
| Epidote | Gangue |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite | ||||||
| |||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Metasedimentary Rock > Quartzite |
| Rock unit name | Bisbee Formation |
| Rock description | Bisbee Formation |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| (1) | -110.72678, 31.43403 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Rhyolite Forms Dikes And Intrusive Sheets In Limestone |
| Type of structure | Local |
| Structure description | Sedimentary Beds Strike Approximately N-S And Dip 65-70 W |
| General form | ROUGHLY BANDED |
|---|---|
| Dip | 70 SE |
| Width | 0.76M |
| Development status | Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Harshaw District |
|---|
| Ownership category | National Forest |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M899933 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0040230183 |
SCHRADER, FRANK C., 1915, MINERAL DEPOSITS OF THE SANTA RITA AND PATAGONIA MOUNTTAINS, ARIZONA; USGS BULLETIN 582, P. 307-308
USBM FILES, ENDLESS CHAIN MINE
KEITH, STANTON B., 1975, INDEX OF MINING PROPERTIES IN SANTA CRUZ COUNTY, ARIZONA; ARIZONA BUREAU OF MINES BULLETIN 191, P. 79
ABGMT FILES, STANTON B, KEITH
SIMONS, FRANK S., 1974, GEOLOGIC MAP AND SECTIONS OF THE NOGALES AND LOCHIEL QUADRANGLES, SANTA CRUZ COUNTY, ARIZONA; USGS MAP I-762 (1:48000)
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-APR-1982 | Calder, Susan R. | Arizona Bureau of Geology and Mineral Technology |
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.