| Deposit ID | 10039628 |
|---|---|
| MRDS ID | M050524 |
| Record type | Site |
| Current site name | Broad Top Mine |
| Alternate or previous names | Alta Copper |
| Related records | 10113504 |
| Geographic coordinates: | -110.75818, 31.85152 (WGS84) |
|---|---|
| Elevation | 1768 |
| Relative position | 2 MI ESE OF HELVETIA. |
Political divisions (FIPS codes)
Pima(county)
Arizona(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Helvetia(quadrangle 1:24,000 scale)
Fort Huachuca(quadrangle 1:100,000 scale)
Nogales(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Rillito(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 | Pima |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Gila and Salt River | 018S | 015E | 24 | SE4 | Arizona |
| Commodity | Importance |
|---|---|
| Silver | Primary |
| Copper | Primary |
| Gold | Secondary |
| Tungsten Critical | Secondary |
| Molybdenum | Secondary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Gold | Ore |
| Malachite | Ore |
| Molybdenite | Ore |
| Pyrite | Ore |
| Scheelite | Ore |
| Silver | Ore |
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite | ||
| |||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Metasedimentary Rock > Quartzite |
| (1) | -110.75818, 31.85152 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | Strongly Brecciated Fault Zone |
| General form | IRREGULAR |
|---|---|
| Strike | EW |
| Dip | 80 S |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Year of first production | 1956 |
| Year of last production | 1959 |
| District name | Helvetia-Rosemont District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | Coronado National Forest |
| Type | Operator |
|---|---|
| Owner | Lewisohn Copper Co. |
| Year | 1959 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1955-1959 | |||||||||||||||||||||
| Material | ORE | |||||||||||||||||||||
| Accuracy | Estimate | |||||||||||||||||||||
| Description | Cp_Grade: ^5% Cu, 10 Oz/T Ag, Minor Au | |||||||||||||||||||||
| ||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M050524 |
KEITH, 1974, ABM BULL 189, P. 124.
CORNWALL, H.R., 1973, FIELD EXAM (?).
CIMRI
KEITH, 1974.
| Subject category | Comment text |
|---|---|
| Deposit | THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M050524 WITH RECORD D000790 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEODORE, USGS. ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV |
| Deposit | DISSEMINATED SCHEELITE AND SPOTS OF MOLYBDENITE IN FAULT ZONE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAR-1983 | Peterson, Jocelyn A. | U.S. Geological Survey | |
| Updater | 01-JAN-1975 | Wilt, Jan And Elliot, J.E. | Alabama 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.