| Deposit ID | 10106198 |
|---|---|
| MRDS ID | W031510 |
| Record type | Site |
| Current site name | Rockland Mine |
| Geographic coordinates: | -89.16424, 46.73389 (WGS84) |
|---|
Political divisions (FIPS codes)
Ontonagon(county)
Michigan(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Rockland(quadrangle 1:24,000 scale)
Ontonagon(quadrangle 1:100,000 scale)
Iron River(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Ontonagon(hydrologic unit)
Southcentral Lake Superior(hydrologic accounting unit)
Southern Lake Superior(hydrologic subregion)
Great Lakes(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Michigan | Ontonagon |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Michigan | 050N | 039W | 15 | NE OF NE | Michigan |
| NW OF NE | Michigan | ||||
| SE OF NE | Michigan | ||||
| SW OF NE | Michigan |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Silver | Secondary |
| Materials | Type of material |
|---|---|
| Copper | Ore |
| Silver | Ore |
| Quartz | Gangue |
| Calcite | Gangue |
| Epidote | Gangue |
| Pumpellyite-(Mg) | Gangue |
| Chlorite | Gangue |
| Feldspar | Gangue |
| Model code | 96 |
|---|---|
| USGS model code | Unassigned |
| Deposit model name | Native Cu |
| Mark3 model number | 99 |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt | ||||
| Rock unit name | Portage Lake Volcanics | ||||
| Rock description | Portage Lake Volcanics | ||||
| |||||
| (1) | -89.16424, 46.73389 |
|---|
| General form | TABULAR FISSURE |
|---|---|
| Strike | 44 NW |
| Thickness | 2M |
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Large |
| Significant | Yes |
| Year of first production | 1853 |
| Year of last production | 1880 |
| District name | Keweenaw Copper |
|---|
| Ownership category | Private |
|---|
| Year | 1880 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1854-1880 | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| |||||||||||||||
COPPER RANGE CO., UNPUBLISHED, 1968, BEDROCK GEOLOGY MAP OF THE ROCKLAND (NW 1/4) QUADRANGLE, ONTONAGON COUNTY, MICHIGAN. GEOLOGY MAPPED AND COMPILED BY COPPER RANGE EXPLORATION CO., INC., AND BY H. HUBBARD (U.S.G.S.)
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: U.S. GEOLOGICAL SURVEY PROF. PAPER 144, 238P.
WIILBAND, J.T., 1978, THE COPPER RESOURCES OF NORTHERN MICHIGAN; PREPARED FOR THE U.S. BUREAU OF MINES, CONTRACT NO. J0366067, 66P.
JOHNSON, A.M., AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, ONTONAGON COUNTY, P. 216-219, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.
BUTLER AND BURBANK (1929)
| Subject category | Comment text |
|---|---|
| Deposit | ORGANIZED IN 1853, FIRST PRODUCTION WAS IN 1854. STAMP MILL WAS ERECTED IN 1856. THE CO. CEASED OPERATIONS IN 1870 AND WAS ABSORBED BY NATIONAL MINE INTERESTS. WORKED OCCASIONALLY BY TRIBUTORS UNTIL 1880. SHIPPED EVERY YEAR FROM 1854-1880. PRODUCED FROM BOTH FISSURES AND CONGLOMERATES. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-OCT-1980 | Yeager, Keith (Cannon, W.) | Michigan Geological Survey Division | |
| Updater | 01-MAR-1997 | Sutphin, D.M. | U.S. Geological Survey | |
| Editor | 01-MAY-1997 | Mason Jr., G.T. | U.S. Geological Survey | |
| Updater | 08-AUG-2001 | Anderson, Arlene (M. Gere) | Michigan Department of Natural Resources |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.