| Deposit ID | 10026393 |
|---|---|
| MRDS ID | K004804 |
| Record type | Site |
| Current site name | McClure's Knob Magnetite Deposits |
| Alternate or previous names | Tolley Cut |
| Related records | 10223778 |
| Geographic coordinates: | -81.44232, 36.5348 (WGS84) |
|---|---|
| Relative position | ABOUT 1.3 MILES W OF STATE RT. 16 BRIDGE OVER HELTON CREEK, AND JUST EAST OF DIRT ROAD OVER DIVIDE WEST OF KNOB. |
Political divisions (FIPS codes)
Ashe(county)
North Carolina(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Grassy Creek(quadrangle 1:24,000 scale)
Wytheville(quadrangle 1:100,000 scale)
Winston-Salem(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper New(hydrologic unit)
Kanawha(hydrologic accounting unit)
Kanawha(hydrologic subregion)
Ohio(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | North Carolina | Ashe |
| Commodity | Importance |
|---|---|
| Iron | Primary |
| Materials | Type of material |
|---|---|
| Magnetite | Ore |
| Epidote | Gangue |
| Hornblende | Gangue |
| Result | BAYLEY (1923) GIVES ANALYSES FOR SIX LOCALITIES AROUND THE KNOB |
|---|---|
| Result | FINE, GRANULAR MAGNETITE ORE MIXED WITH HORNBLENDE FROM THE TOLLEY CUT CONTAINED 44.87% FE, 23.23% SIO2, 0.036% S, 0.053% P, AND A P:FE RATIO OF 0.118. |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Metamorphic Rock > Gneiss | ||||||
| Rock unit name | Cranberry Gneiss: Augen Gneiss And Porphyritic Gneiss (Rankin, Espenshade, And Neuman, 1972) | ||||||
| Rock description | Cranberry Gneiss: Augen Gneiss And Porphyritic Gneiss (Rankin, Espenshade, And Neuman, 1972) | ||||||
| |||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Gneiss |
| (1) | -81.44232, 36.5348 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Northeast |
| General form | LENS, PINCH AND SWELL |
|---|---|
| Thickness | 0.91M |
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Significant | No |
| District name | Poison Branch Belt Of Deposits |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | K004804 |
STUCKEY, J. L., 1965, NORTH CAROLINA: ITS GEOLOGY AND MINERAL RESOURCES: RALEIGH, N. C., NORTH CAROLINA DEPT. CONSERV. AND DEVEL., 550 P.
NITZE, H.B.C., 1893, IRON ORES OF NORTH CAROLINA: NORTH CAROLINA GEOLOGICAL SURVEY BULL. NO. 1, 239 P.
1893 OTHER NITZE, H.B.C., N. C. GEOL. SUR. BULL. 1
1923 OTHER BAYLEY, W. S., TENN. DIV. GEOL. BULL. 29
1965 COMPILE STUCKEY, J. L., N. C. DEPT. CONS. DEVEL.
1966 COMPILE BRYANT AND REED, GEOL. SURV. CIR. 521
| Subject category | Comment text |
|---|---|
| Deposit | ACCORDING TO BAYLEY (1923), THE POISON BRANCH BELT IS A CONTINUOUS SERIES OF DEPOSITS, WITH EACH DEPOSIT COMPRISED OF A NUMBER OF NEARLY PARALLEL, CLOSELY SPACED VEINS. COMMERCIAL PORTIONS OF THE ORE BODIES ARE "...IN THE FORM OF VEINS OR DIKES OF RICH MAGNETITE THAT CUT MASSES OF LEANER ORE. THE LEAN ORE COMPRISES THE LENSES." |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-NOV-1975 | Hale, Robin C. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.