1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Riverside

Past Producer in Alaska, United States with commodities Silver, Gold, Copper, Lead, Tungsten, Zinc, Barium-Barite
Map
XML
JSON
KML
B
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308781
MRDS ID A010314
Record type Site
Current site name Riverside
Alternate or previous names Riverview, Lindeborg
Related records 10209449, 10000270

Geographic coordinates

Geographic coordinates: -130.07075, 56.00277 (WGS84)
Relative position The Riverside mine is near the west boundary of Section 2 at an elevation of about 500 feet (main adit), and just east of the road running along the Salmon River (Elliott and Koch, 1981, p. 20, loc. 80). The location is accurate within about 100 feet. 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
Silver Primary
Gold Primary
Copper Primary
Lead Primary
Tungsten Critical Primary
Zinc Critical Primary
Barium-Barite Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Pyrrhotite Ore
Scheelite Ore
Sphalerite Ore
Tetrahedrite Ore
Ankerite Gangue
Calcite Gangue
Quartz Gangue

Mineral occurrence model information

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

Nearby scientific data

(1) -130.07075, 56.00277
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the area of the Riverside mine are the Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary and subordinate andesitic (greenstone) metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Eocene Hyder Quartz Monzonite, which intrudes the Texas Creek and Hazelton rocks; and still-younger Tertiary lamprophyre dikes, which cut all the other rocks (Smith, 1973, 1977; Koch, 1996). The deposit (Chapin, 1916, p. 97; Westgate, 1922, p. 139; Buddington, 1925, p. 74-75, 79-82; 1929, p. 43, 77-81; Thorne and others, 1948, p. 4-5; Byers and Sainsbury, 1956, p. 125-136; Noel, 1966, p. 53-55; Cobb, 1978, p. 66-69) consists of two or three main quartz fissure veins up to 7 feet thick in Texas Creek Granodiorite, and the Lindeborg deposit, which is either a mineralized shear zone in a Hazelton schist inclusion in the granodiorite (according to most workers), or a mineralized zone of mylonitic gneiss and ultramylonite derived from the granodiorite (according to Smith, 1977, p. 17-18). The Lindeborg deposit contains considerable scheelite; the quartz veins carry only small amounts. Other than scheelite, the principal ore minerals are galena, pyrite, tetrahedrite, pyrrhotite, chalcopyrite, sphalerite, and native gold. The principal gangue mineral is quartz, accompanied by small amounts of calcite, ankerite, and barite. In the Texas Creek Granodiorite, the scheelite-bearing lodes (Byers and Sainsbury, 1956, p. 125-136) are mineralized shoots in quartz fissure veins. In the Lindeborg shear zone, they are in part quartz fissure veins and in part replacement deposits. Scheelite in the Lindeborg zone appears to have preferentially replaced calcareous laminae in the schist hostrock. The Lindeborg lode is about 3 feet thick and has been traced in outcrop for 2000 feet and through a vertical interval of more than 700 feet. Lead-isotope studies of galena from the Riverside mine (Maas and others, 1995, p. 254) indicate that the deposit is Eocene in age, contemporaneous with emplacement of the Hyder Quartz Monzonite.
  • Age = Lead-isotope studies of galena from the Riverside mine (Maas and others, 1995, p. 254) indicate that the deposit is Eocene in age, contemporaneous with emplacement of the Hyder Quartz Monzonite.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Hyder

Comments on the production information

  • Production Notes = From 1925-1951, the Riverside mine yielded about 30,000 tons of ore. Almost all of the ore was from the Lindeborg lode, which produced about 3,000 oz Au, 100,000 oz Ag, 100,000 lb Cu, 250,000 lb Pb, 20,000 lb Zn, and 70,000 lb WO3.

Comments on the workings information

  • Workings / Exploration = The Riverside mine operated discontinuously from 1925-1951. It was developed by more than 6000 feet of underground workings and explored by about 4600 feet of diamond drill holes, mainly during World War II.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Byers and Sainsbury, 1956; Cobb, 1978 (OFR 78-922)

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins
Deposit Other Comments = Deposit probably originally staked about 1915-1920. Some descriptions of the Riverside mine refer to it as the Riverview or Lindeborg property (Cobb, 1978, p. 66).

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.

External references

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.