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Stoney Vein

Prospect in Alaska, United States with commodities Silver, Gold, Copper, Lead, Arsenic, Antimony
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Geologic information

Identification information

Deposit ID 10003498
MRDS ID A106256
Record type Site
Current site name Stoney Vein

Geographic coordinates

Geographic coordinates: -152.92278, 61.90949 (WGS84)
Relative position Alaska Department of Natural Resources claim records show this property located approximately one mile north of Mount Stoney in Section 15, T 21 N., R 20 W. Location is accurate to 500 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Lead Primary
Arsenic Secondary
Antimony Secondary

Comments on the commodity information

  • Ore Material = Copper (native)

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Stibnite Ore
Copper Ore
Calcite Gangue
Dolomite Gangue
Epidote Gangue
Graphite Gangue
Quartz Gangue
Siderite Gangue
Tourmaline Gangue

Alteration

  • (Local) Calcite, epidote, sericite, tourmaline, quartz

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 Host
    Stratigraphic age (oldest) Late Jurassic

Nearby scientific data

(1) -152.92278, 61.90949
ListMap

Comments on the geologic information

  • Geologic Description = Part of the Yentna trend of Late Cretaceous/early Tertiary composite plutons (Tcp) described by Reed and Nelson (1980), the Mount Estelle pluton (Tme, Reed and Elliott, 1970) extends from Timber Creek on the south to the Portage Creek area in the north. At this site in the central part of the pluton, a biotite-hornblende-quartz monzonite intrudes Mesozoic marine sedimentary rocks (KJs) of the Kahiltna terrane. ? Two veins follow dilatational zones within the pluton along its west side (Cominco American Incorporated, unpublished reports, 1986-1987). The Main Stoney vein is steeply dipping structure that is mapped as more than 3 miles long, varies in measured width from 14 feet to 60 feet and has a vertical relief of at least 1000 feet. The mineralogy consists of alternating sulfide-quartz -carbonate vein material and altered intrusive material. The mineralogy consists of quartz-calcite-dolomite-siderite-tourmaline-pyrrhotite-chalcopyrite- arsenopyrite-pyrite-stibnite +/- graphite, sphalerite and galena. The North Stoney vein is a sub-parallel feature just west of the northern end of the Main Stoney vein. This vein is 35 feet at it's widest and has similar mineralogy to the Main Stoney vein. A third vein is located one mile to the west.
  • Age = Possibly related to the Tertiary/Cretaneous pluton that is the host rock
  • Age = Host rock is Tertiary - Cretaceous.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Yentna

Comments on the workings information

  • Workings / Exploration = Exploration included prospecting, rock chip geochemical sampling, and mapping. Technical climbers were employed to map and sample the steep terrain.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106256
USGS Alaska Resource Data File ARDF TY020

Bibliographic references

  • Deposit

    Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, scale 1:250,000.

  • Deposit

    Reed, B.L., and Elliott, R.L., 1970, Reconnaissance geologic map, analyses of bedrock and stream sediment samples, and an aeromagnetic map of parts of the southern Alaska Range: U.S. Geological Survey Open-file Report 70-271, 24 p., 4 sheets, scale 1:250,000.

Comments on the references

  • Primary Reference = Reed and Elliott, 1970

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1998 Madelyn A. Millholland Millholland & Associates