Prospect, Inactive

Commodities and mineralogy

Main commodities Zn
Other commodities Pb
Ore minerals smithsonite; sphalerite
Gangue minerals dolomite; secondary carbonate

Geographic location

Quadrangle map, 1:250,000-scale MD
Quadrangle map, 1:63,360-scale B-3
Latitude 63.481
Longitude -154.167
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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).

Geologic setting

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 appreciable lead; however, galena was identified in hand specimens in the gossan.
Geologic map unit (-154.169334704006, 63.4804092490632)
Mineral deposit model Southeast Missouri Pb-Zn (Cox and Singer, 1986; model 32a) or Mississippi Valley type (Cox and Singer, 1986; model 32b).
Mineral deposit model number 32a or 32b
Age of mineralization Age of host unit is believed to be Silurian (inferred) from fossils (Blodgett, 1982). The age of mineralization is unknown.
Alteration of deposit Vuggy dolomite replacement.

Production and reserves

Workings or 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.
Indication of production None
Reserve estimates None.

Additional 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.


MRDS Number 10307789


Andrews, Tom, and Rishel, John, 1982, Annual Report for 1981, Reef Ridge I-to-XIII Project Areas, Kuskokwim Block, Alaska: Anchorage, Alaska, WGM Inc., Project Report 4, 45 p., 2 sheets, scales 1:63,360 and 1:20,000. (Report held by Doyon, Limited, Fairbanks, Alaska.)
Blodgett, R.B., 1982, Stratigraphy of Reef Ridge project area; WGM Inc., Anchorage, Alaska, Reef Ridge Project area, Block 10, Doyon region: WGM Inc., 34 pages.
Reporters Bundtzen, T.K. (Pacific Rim Geological Consulting)
Last report date 6/2/1998