| Deposit ID | 10000198 |
|---|---|
| MRDS ID | A010235 |
| Record type | Site |
| Current site name | Hyder Skookum |
| Related records | 10210070 |
| Geographic coordinates: | -130.03758, 56.0106 (WGS84) |
|---|---|
| Relative position | SEE LOCATION COMMENTS |
Political divisions (FIPS codes)
Prince of Wales-Hyder(Census area)
Alaska(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Bradfield Canal A-1(quadrangle 1:63,360 scale)
Bradfield Canal SE(quadrangle 1:100,000 scale)
Bradfield Canal(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Southern Southeast Alaska(hydrologic accounting unit)
Southeast Alaska(hydrologic subregion)
Alaska(hydrologic region)
Federal lands
Tongass National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State |
|---|---|
| United States | Alaska |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Pyrrhotite | Gangue |
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite |
| Rock unit name | Texas Creek |
| Rock description | Texas Creek |
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone |
| (1) | -130.03758, 56.0106 |
|---|
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Significant | No |
| District name | Hyder |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | A010235 | |
| USGS | Alaska Resource Data File | ARDF | BC076 | |
| USGS | Mineral Resources Data System | MRDS | D002172 |
Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p."
Smith, J.G., 1977, Geology of the Ketchikan D1 and Bradfield Canal A-1 quadrangles, southeastern Alaska: U.S. Geological Survey Bulletin 1425, 49 p.
Elliott, R.L., and Koch, R. D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.
Koch, R. D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728A, 35 p.,1 sheet, scale 1:250,000.
| Subject category | Comment text |
|---|---|
| Deposit | THE COUNTRY ROCKS IN THE AREA OF THIS PROSPECT ARE PELITIC METASEDIMENTARY AND SUBORDINATE ANDESITIC (GREENSTONE) METAVOLCANIC STRATA OF THE JURASSIC OR OLDER MESOZOIC HAZELTON GROUP, WHICH IS UNDERLAIN AND LOCALLY INTRUDED BY THE TRIASSIC TEXAS CREEK GRANODIORITE (SMITH, 1977; KOCH, 1996). BUDDINGTON (1929, P. 72) DESCRIBES TWO TYPES OF DEPOSITS AT THIS SITE. ONE DEPOSIT IS A SULFIDE REPLACEMENT MASS IN SOMEWHAT SCHISTOSE GREENSTONE NEAR THE CONTACT OF A QUARTZ PORPHYRY DIKE. THE MASS CONSISTS OF PYRRHOTITE AND A LITTLE CHALCOPYRITE AND ARSENOPYRITE. SOME SULFIDES ALSO ARE DISSEMINATED IN QUARTZ IN THE SAME ZONE. THE OTHER TYPE OF DEPOSIT COMPRISES TWO PARALLEL QUARTZ VEINS UP TO 7 FEET THICK THAT LOCALLY FORM BRECCIAS WITH THE QUARTZ PORPHYRY OR GREENSTONE COUNTRY ROCKS. SOME OF THE COUNTRY ROCK FRAGMENTS IN THE BRECCIAS ARE IMPREGNATED WITH PYRITE AND A STRINGER IN THE GREENSTONE CARRIES A LITTLE DISSEMINATED SULFIDE. SURFACE EXPOSURES OF THE VEINS CARRY A LITTLE CALCITE |
| Deposit | BUT ARE MOSTLY BARREN OF SULFIDES. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-OCT-1983 | Hirschmann, M. M. (Elliott, R. L.) | U.S. Geological Survey | |
| Updater | 01-MAY-1998 | Berg, H. C. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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