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Lynn-Marie

Prospect in Alaska, United States with commodities Zinc, Lead
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Geologic information

Identification information

Deposit ID 10307789
Record type Site
Current site name Lynn-Marie

Geographic coordinates

Geographic coordinates: -154.16996, 63.4805 (WGS84)
Relative position The Lynn-Marie prospect is located at 2,500 feet (762 m) in elevation near the crest of a prominent knob overlooking the headward reaches of the North Fork of Soda Creek in Section 23, T. 23 S., R. 24 E., of the Kateel River Meridian. Location is accurate to within about 250 feet (76 m).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Zinc Primary
Lead Secondary

Comments on the commodity information

  • Gangue = secondary carbonate

Materials information

Materials Type of material
Smithsonite Ore
Sphalerite Ore
Dolomite Gangue

Alteration

  • (Local) Vuggy dolomite replacement.

Mineral occurrence model information

Model code 224
USGS model code 32a
BC deposit profile E12
Deposit model name Mississippi Valley, S.E. Missouri Pb-Zn
Mark3 model number 42

Host and associated rocks

  • Host or associated Host
    Stratigraphic age (youngest) Silurian

Nearby scientific data

(1) -154.16996, 63.4805
ListMap

Comments on the geologic information

  • Geologic Description = Mineralization in the Lynn-Marie prospect occurs in a solution-breccia gossan zone 50 feet (15 m) wide and 250 feet (76 m) long in the Silurian Paradise Fork Formation of Dutro and Patton (1982); this is unit 'Sic' of Andrews and Rishel (1982). The host rock is a fine grained micritic limestone and limey siltstone that has been extensively replaced by a white dolomite. The Lynn-Marie prospect is on the north limb of the Big Gate anticline immediately below micritic limestone of the Whirlwind Creek Formation (Dutro and Patton, 1982). Grab samples from surface exploration of the gossan contained up to 46.8 percent zinc, with no appraciable lead; however, galena was identified in hand specimens in the gossan.
  • Age = Age of host unit is believed to be Silurian (inferred) from fossils (Blodgett, 1982). The age of mineralization is unknown.

Economic information

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = The Lyn-Marie prospect was found in the late 1970s during a regional base metal exploration program conducted by WGM Inc. and Patino Ltd. on lands selected by Doyon Ltd. Grab samples from surface exploration of gossan contained up to 46.8 percent zinc, with no appreciable lead; however, galena was identified in hand specimens. About 10 to 50 percent of the mineralized zone was intense gossan.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF MD042

Bibliographic references

  • Deposit

    Andrews, Tom, and Rishel, John, 1982, Annual Report for 198, Reef Ridge I-to-XIII Project Areas, Kuskokwim Block, Alaska: Anchorage, Alaska, WGM Inc., Project Report 4, 45 pages, two sheets at 1:63,360 and 1:20,000 scales. (Report held by Doyon, Limited, Fairbanks, Alaska.)

  • Deposit

    Blodgett, R.B., 1982, Stratigraphy of Reef Ridge project area: WGM Inc., Anchorage, Alaska, Reef Ridge Project area, Block 10, Doyon region: 34 pages.

  • Deposit

    Dutro, T.T. Jr., and Patton,W.W. Jr., 1982, New Paleozoic Formations in the northern Kuskokwim Mountains, west-central Alaska: U.S. Geological Survey Bulletin 1529-H, p. H13-H22.

Comments on the references

  • Primary Reference = Andrews and Rishel, 1982

General comments

Subject category Comment text
Deposit Model Name = Southeast Missouri Pb-Zn (Cox and Singer, 1986; model no. 32a) or Mississippi Valley Type
Deposit Other Comments = See Reef Ridge (MD055) and Soda Creek (MD056) Mississippi Valley Type deposits. The Lynn-Marie prospect is on land selected or conveyed to Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.

Reporter information

Type Date Name Affiliation Comment
Reporter 02-JUN-98 Bundtzen, T.K. Pacific Rim Geological Consulting