| Deposit ID | 10082805 |
|---|---|
| MRDS ID | W062155 |
| Record type | Site |
| Current site name | Grassy Island Prospect |
| Geographic coordinates: | -93.21467, 48.61806 (WGS84) |
|---|---|
| Location accuracy | 1000(meters) |
| Relative position | VEINS OCCUR ON THE EAST END OF GRASSY ISLAND IN RAINY LAKE, ABOUT EIGHT MILES EAST OF FORT FRANCES, ONTARIO, CANADA., Est Estimated Location Taken From 1:50,000 Scale Map, Est Estimated Location Taken From 1:50,000 Scale Map |
Political divisions (FIPS codes)
Koochiching(county)
Minnesota(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Island View(quadrangle 1:24,000 scale)
International Falls(quadrangle 1:100,000 scale)
International Falls(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Rainy Lake(hydrologic unit)
Rainy(hydrologic accounting unit)
Rainy(hydrologic subregion)
Souris-Red-Rainy(hydrologic region)
Federal lands
Superior National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Minnesota | Koochiching |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 71N | 22W | 30 | Minnesota |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Materials | Type of material |
|---|---|
| Gold | Ore |
| Chlorite | Gangue |
| Pyrite | Gangue |
| Quartz | Gangue |
| Sericite | Gangue |
| Specularite | Gangue |
| Tourmaline | Gangue |
| (1) | -93.21467, 48.61806 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | In The Quetico Subprovince Of The Superior Province. The Rainy Lake Area Lies Within A Dextral Wrench (Shear) Zone Bounded On The North By The Quetico Fault And On The South By The Rainy Lake-Seine River Fault. |
| Commodity type | Metallic |
|---|---|
| Deposit size | Small |
| Significant | No |
| District name | Rainy Lake |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W062155 |
SIMS, P.K., AND DAY, W.C., 1992, A REGIONAL STRUCTURAL MODEL FOR GOLD MINERALIZATION IN THE SOUTHERN PART OF THE ARCHEAN SUPERIOR PROVINCE, UNITED STATES, IN SIMS, P.K., AND CARTER, L.M.H., EDS., CONTRIBUTIONS TO PRECAMBRIAN GEOLOGY OF THE LAKE SUPERIOR REGION: U.S. GEOLOGICAL SURVEY BULLETIN 1094-M, 19 P.
DAY, W.C., 1990, BEDROCK GEOLOGIC MAP OF THE RAINY LAKE AREA, NORTHERN MINNESOTA: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATIONS SERIES MAP I-1927, SCALE 1:50,000.
DAY, W.C., AND SIMS, P.K., 1984, TECTONIC EVOLUTION OF THE RAINY LAKE AREA, NORTHERN MINNESOTA: GEOLOGICAL ASSOCIATION OF CANADA, THE MINERAL ASSOCIATION OF CANADA, LONDON, ONTARIO, CANADA, PROGRAM WITH ABSTRACTS, V. 9, P. 57.
| Subject category | Comment text |
|---|---|
| Deposit | GROUT (1937) CLASSIFIED THESE DEPOSITS AS OF PROBABLE HYPOTHERMAL ORIGIN. |
| Deposit | THE OCCURRENCE OF LARGE GOLD DEPOSITS IN CANADA SUGGESTS THAT THE GREENSTONE-GRANITE TERRANES OF MINNESOTA ARE FAVORABLE FOR THE OCCURRENCE OF IMPORTANT GOLD DEPOSITS. |
| Deposit | GROUT (1937) DID NOT GIVE A MORE SPECIFIC NAME FOR THIS PROSPECT. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-DEC-95 | Sutphin, David M. (Cannon, W. F.) | U.S. Geological Survey | |
| Updater | 01-MAR-97 | Sutphin, David M. | U.S. Geological Survey | |
| Editor | 01-MAY-97 | Mason Jr., G.T. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.