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Ninety-six

Prospect in Alaska, United States with commodities Copper, Lead, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10000185
MRDS ID A010221
Record type Site
Current site name Ninety-six
Alternate or previous names Gold Eagle
Related records 10234104

Geographic coordinates

Geographic coordinates: -130.06869, 56.04283 (WGS84)
Relative position This prospect is in Section 23 at an elevation of about 500 feet at the west base of Mineral Hill and just off the old road on the east bank of Texas Creek (Elliott and Koch, 1981, p. 15, loc. 59). The location is probably accurate within a tenth of a mile.? Also see Additional Comments field, below.

Site location context

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)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Lead Primary
Zinc Critical Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Tetrahedrite Ore
Quartz Gangue

Alteration

  • (Local) Hostrock identified as quartzite may indicate silicification of pelitic country rock.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • 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 Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -130.06869, 56.04283
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the area of this prospect are the Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Eocene Boundary Granodiorite, which intrudes the Hazelton and Texas Creek rocks; and still-younger Tertiary lamprophyre dikes, which cut all the other rocks (Smith, 1973, 1977; Koch, 1996).? the deposit (Buddington, 1925, p. 87, and 1929, p. 93; summarized by Cobb, 1978, p. 61) is in a breccia zone in a Texas Creek granodiorite dike in interbedded slate and quartzite. The breccia zone is about 5 feet thick and was traced in outcrop for about 200 feet. The zone consists of reticulating quartz stringers and veinlets that aggregate 12-14 inches in thickness that contain galena, sphalerite, a little chalcopyrite, and sparse tetrahedrite. A 63-foot adit was driven to intersect the lode, but there is no record of any production.? Maas and others (1995, p. 254) suggest that the age of the Ninety-six (96) prospect is Eocene, based on similarities in mineralogy, structural setting, and hostrock, to isotope-dated Eocene deposits in the Hyder district (see, for example, BC086). If so, the deposit is contemporaneous with emplacement of the Boundary Granodiorite.
  • Age = Maas and others (1995, p. 254) suggest that the age of the Ninety-six (96) prospect is Eocene, based on similarities in mineralogy, structural setting, and hostrock, to isotope-dated Eocene deposits in the Hyder district (see, for example, BC086). If so, the deposit is contemporaneous with emplacement of the Boundary Granodiorite.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Hyder

Comments on the production information

  • Production Notes = Reported small test shipment of hand-cobbed ore (Maas and others, 1995, p. 258).

Comments on the workings information

  • Workings / Exploration = Deposit was explored in the 1920's by opencuts and a 100-foot adit that was driven to intersect the lode.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Cobb, 1978 (OFR 78-922)

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins
Deposit Other Comments = Probably originally staked in early 1920's.? In an early report, Buddington (1925, p. 87) includes a reference to Snyder, presumably the claimholder at the time. The Gold Eagle claims, staked in 1955, probably covered the Ninety-six property (U.S. Bureau of Mines, 1979).

Reporter information

Type Date Name Affiliation Comment
Reporter 17-MAY-1998 H. C. Berg U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.