| Deposit ID | 10070520 |
|---|---|
| MRDS ID | W013486 |
| MAS/MILS ID | 0160590070 |
| Record type | Site |
| Current site name | Chicago Mine |
| Included sites | Blackbird Mine |
| Point of reference | Main Entrance |
|---|---|
| Geographic coordinates: | -114.3501, 45.12586 (WGS84) |
| Elevation | 2286 |
| Location accuracy | 100(meters) |
| Relative position | Site of portal to Chicago |
Political divisions (FIPS codes)
Lemhi(county)
Idaho(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Gant Mountain(quadrangle 1:24,000 scale)
Bighorn Crags(quadrangle 1:100,000 scale)
Elk City(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Middle Salmon-Panther(hydrologic unit)
Salmon(hydrologic accounting unit)
Lower Snake(hydrologic subregion)
Pacific Northwest(hydrologic region)
Federal lands
Salmon-Challis National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Idaho | Lemhi |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Boise | 021N | 018E | 28 | Idaho |
| Commodity | Importance |
|---|---|
| Cobalt Critical | Primary |
| Copper | Secondary |
| Gold | Secondary |
| Bismuth Critical | Tertiary |
| Nickel Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Bismuth | Ore |
| Chalcocite | Ore |
| Chalcopyrite | Ore |
| Cobaltite | Ore |
| Gold | Ore |
| Safflorite | Ore |
| Biotite | Gangue |
| Limonite | Gangue |
| Magnetite | Gangue |
| Pyrite | Gangue |
| Pyrrhotite | Gangue |
| Quartz | Gangue |
| Vivianite | Gangue |
| Result | 0.35% CO, 3.12% CU |
|---|---|
| Result | GENERAL CO TO CU RATIO IS 1:2.35 |
| Result | .8 % NI |
| Host or associated | Associated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Gabbro | ||||||||
| Rock unit name | Gabbro | ||||||||
| Rock description | Gabbro | ||||||||
| |||||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist |
| Rock unit name | Belt Supergroup |
| Rock description | Belt Supergroup-Schist |
| Main Entrance (1) | -114.3501, 45.12586 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | Reverse Faults, Folds. Chicago Zone On Broad Syncline Plunging 43 Deg N |
| General form | IRREGULAR STRINGERS AND PODS |
|---|---|
| Strike | N 30 DEG W |
| Dip | 49 DEG NE |
| Length | 670.56M |
| Width | 13.72M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Year of first production | 1951 |
| District name | Blackbird District |
|---|
| Ownership category | Private |
|---|
| Type | Operator |
|---|---|
| Owner | Howe Sound Mining Co. |
| Type | Owner |
|---|---|
| Owner | Hanna Mining Co. |
| Type of workings | Surface/Underground |
|---|---|
| Length | 97.54M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W013486 | |
| Idaho Geological Survey | Idaho Mines and Prospects | IMP | EC_428 | http://www.idahogeology.org/ |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0160590070 | |
| Idaho Geological Survey | Idaho Mines and Prospects | IMP | EC_428 | http://www.idahogeology.org/ |
Umpleby, J.B., 1913, Geology and Ore Deposits of Lemhi County, Idaho: USGS Bulletin 528, 182 P.
Anderson, A.L., 1943, Preliminary report on the cobalt deposits in the Blackbird District, Lemhi County, Idaho: Idaho Bureau of Mines and Geology Pamphlet 61, 34 P.
Reed, G.C., And Herdlick, J.A., 1947, Blackbird Cobalt Deposits, Lemhi County, Idaho: USBM R.I. 4012, P. 5
Baldwin, J.A., October 8, 1976, Personal Communication.
Trexler, B.D., Jr., 1974, Unpublished Blackbird Report
Baldwin, J.A., October 8, 1976, Personal Communication.
| Subject category | Comment text |
|---|---|
| Deposit | Deposit On W Limb Of Syncline Is 15 Ft Wide And Dips 60 Deg Ne; Deposit In Trough Of Fold Is 45 Ft Wide And Dips 45 Deg N; Deposit On E Limb Narrows And Maintains Low Dip To The N |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUL-1975 | Ortman, Dale; Miller, Pat | U.S. Geological Survey | |
| Updater | 21-JUL-2009 | Causey, J. Douglas | U.S. Geological Survey | Combined any useful information from duplicate record Dep_ID 10168755 before deletion. |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.