LWM

Prospect, Active

Alternative names

Little Whiteman
West LWM

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Other commodities Au; Hg; In; W
Ore minerals cerrusite; chalcopyrite; galena; hemimorphite; smithsonite; sphalerite
Gangue minerals calcite

Geographic location

Quadrangle map, 1:250,000-scale EA
Quadrangle map, 1:63,360-scale A-4
Latitude 64.2308
Longitude -142.8274
Nearby scientific data Find additional scientific data near this location
Location and accuracy The LWM prospect covers 9 square miles in upper Little Whiteman Creek. The coordinates are at about the center of an area that has been drilled in section 8, T. 8 S., R. 25 E. The location is accurate within 1 mile.

Geologic setting

Geologic description

The rocks in upper Little Whiteman Creek consist of Paleozoic quartzite, schist, marble, and greenstone that have been intruded by the Mount Veta intrusive complex of Mesozoic granodiorite and quartz monzonite stocks and by Jurassic syenite dikes (Foster, 1976; WGM Inc., 1998). A northeast-trending greenstone belt underlies the ridge at the south end of the LWM prospect. Reconnaissance stream-sediment samples from Little Whiteman Creek are anomalous in lead, zinc, and silver, and panned heavy-mineral concentrates contain anomalous tungsten, silver, and mercury. The geochemical anomalies are spatially separated and perhaps reflect input from two different deposit types. Sulfides noted by Foster (1976) on the ridge east of Little Whiteman Creek and on the ridge line at the head of the creek are probable sources for the geochemical anomalies.
WGM Inc. conducted a regional stream-sediment reconnaissance in the upper Little Whiteman Creek area in 1975 (Dashevsky and others, 1986). In 1977, WGM Inc. carried out reconnaissance soil sampling, and did a reconnaissance magnetic survey; in 1978 they did a follow-up panned heavy-mineral-concentrate survey. In 1981, Arctic Resources Inc. mapped the ridges and collected soil samples in the area. Doyon, Ltd. conducted a placer reconnaissance in 1982. In 1990, Central Alaska Gold Co. mapped the geology and collected soil, rock, and stream-sediment samples (WGM Inc., 1998). In 2001, WGM Inc. sampled and hypothesized that the mineralization is hosted in gently dipping siliceous and carbonaceous phyllite. This target, which was open to the north, was well defined by a 6,000-foot by 1,200-foot soil anomaly in zinc, lead, and silver. The only mineralized rock that was found in the heart of the target area was rare gossan exposed in pits during soil sampling. Gossan samples contained up to 34 percent lead, 16 percent zinc, and 13.75 ounces of silver per ton (Swainbank and others, 2002; Ventures Resource Corp., 2002).
Under an agreement with Doyon Ltd., Full Metal Minerals began work on this prospect in 2006. Full Metal Minerals subsequently established a separate company, Full Metal Zinc, to explore their properties in the 40 Mile District.
As of March, 2012, Full Metal Zinc had drilled 72 holes on 50-meter centers at the LWM prospect and outlined a zone of mineralization that extends 970 meters along strike and 300 meters down dip (Full Metal Zinc, 2012 [40 Mile]; 2012 [LWM]). Twelve of these holes totaling 3,229 meters were drilled in 2011. Some notable intercepts were: 1) 44.6 meters that averaged 15.7 percent zinc, 5.3 percent lead, and 76 grams of silver per tonne; 2) 11.1 meters that averaged 26.3 percent zinc, 11.7 percent lead, and 169.8 grams of silver per tonne; 5.6 meters that averaged 31.8 percent zinc, 19.9 percent lead, and 346.8 grams of silver per tonne; and 4) 17.7 meters that averaged 14.5 percent zinc, 11.1 percent lead, and 217.5 grams of silver per tonne.
Full Metal Zinc also drilled two holes totaling 260 meters on a geochemical anomaly at the West LWM prospect about 3,500 meters southwest of the LWM prospect. No significant mineralization was cut.
The mineralization at the LWM prospect consists of massive to semi-massive sphalerite, galena, and chalcopyrite in dolomitized marble and marble breccia. The primary mineralization is capped by a thick oxide zone with smithsonite, hemimorphite, and cerussite. The mineralization also includes notable indium; 9 samples that were analyzed for indium contained from a trace to 39.8 grams of indium per tonne, with an average of 16.1 grams of indium per tonne.
There are two mineralized zones. The lower zone extends the full length of the deposit; it is 970 meters long, 25-50 meters thick, and dips to the southeast. Near the center of the drilling, the upper zone is about 200 meters long and 0-30 meters thick. Stevens (2011), citing a company report from Full Metal Zinc classifies the deposit a carbonate replacement, a subset of the Mississippi Valley type of deposit. Full Metal Zinc considers the LWM a high-temperature carbonate-replacement deposit.
Geologic map unit (-142.829684794118, 64.2304556655117)
Mineral deposit model Ag-Pb-Zn replacement deposit in carbonates (Cox and Singer, 1986; model 19a).
Mineral deposit model number 19a
Age of mineralization This carbonate replacement deposit may be related to nearby Mesozoic granodiorite or quartz monzonite intrusive plutons.
Alteration of deposit The deposit is partly oxidized near the surface.

Production and reserves

Workings or exploration WGM Inc. conducted a regional stream-sediment reconnaissance in the upper Little Whiteman Creek area in 1975 (Dashevsky and others, 1986). In 1977, WGM Inc. carried out reconnaissance soil sampling, and did a reconnaissance magnetic survey; in 1978 they did a follow-up panned heavy-mineral-concentrate survey. In 1981, Arctic Resources Inc. mapped the ridges and collected soil samples in the area. Doyon, Ltd. conducted a placer reconnaissance in 1982. In 1990, Central Alaska Gold Co. mapped the geology and collected soil, rock, and stream-sediment samples (WGM Inc., 1998). In 2001, WGM Inc. sampled. Under an agreement with Doyon Ltd., Full Metal Minerals began work on this prospect in 2006. Full Metal Minerals subsequently established a separate company, Full Metal Zinc, to explore their properties in the 40 Mile District. As of March, 2012, Full Metal Zinc had drilled 72 holes on 50-meter centers at the LWM prospect and outlined a zone of mineralization that extends 970 meters along strike and 300 meters down dip (Full Metal Zinc, 2012 [40 Mile]; 2012 [LWM]).
Indication of production None
Reserve estimates None.
Production notes None.

Additional comments

The LWM prospect is within Doyon, Ltd. selected or conveyed land. For more information contact Doyon, Ltd., Fairbanks, Alaska.

References

References

Carter, C.H., 1981, Doyon exploration program, Blocks 4, 5, 8, and 22: Doyon, Ltd. Report 81-27. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Dashevsky, S.S., 1983, Doyon exploration program, Block 8 - Fortymile, 1982: Doyon, Ltd. Report 83-01. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Dashevsky, S.S., Nicol, D.L., and Bond, J., 1986, Mines, prospects, and geochemical anomalies on Doyon Limited regional overselection lands, Alaska, Blocks 1-8: Doyon, Ltd. Report 86-01a, 300 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 10: Doyon, Ltd. Report 91-8g. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 1: Doyon, Ltd. Report 91-8a. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 2, analytical results, geochemical results part A: Doyon, Ltd. Report 91-8b. (Report held by Doyon, Ltd., Fairbanks, Alaska).
DiMarchi, J.J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1991, Central Alaska Gold Co. 1990 annual report, Alaska field operations - Doyon option volume 2, analytical results, geochemical results part B: Doyon, Ltd. Report 91-8c. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Full Metal Minerals, 2008, 40 Mile district: http://www.fullmetalminerals.com/s/40mile.asp (as of March 4, 2008)
Full Metal Minerals, 2008, Full Metal reports high grade assay results from LWM prospect: /www.fullmetalminerals.com/s/NewsReleases.asp?ReportID=283603&_Type=News&_Title=Full-Metal-Reports-High-Grade-Assay-Results-from-LWM-Prospect-40-Mile-Prope... ( as of Jan 29, 2008)
Full Metal Minerals, 2008, (Map showing LWC drill sites): http://www.fullmetalminerals.com/in/misc/LWM-drill.gif (as of March 4, 2008).
Full Metal Zinc, 2012, 40 Mile District target: http://fullmetalzinc.com/properties/ (as of March 3, 2012).
Full Metal Zinc, 2012, Full Metal Zinc expands LWM deposit, Forthmile property, Alaska: http://fullmetalzinc.com/full-metal-zinc-expands-lwm-deposit-fortymile-property-alaska/ (News release, January 17, 2012).
Lessman, J., 1979, 1978 annual progress report, Doyon Project, South Block 8, tungsten and gold anomalies: Doyon, Ltd. Report 79-13. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Lessman, J., and Holm, B., 1978, 1977 annual progress report, Doyon Project, Champion-Lead Creek area: Doyon, Ltd. Report 78-02. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Stevens, D.L., 2010, 40-Mile project, Fortymile Mining District, East-Central Alaska: Unpublished NI 43-101 report for Full Metal Zinc Ltd. and Full Metal Minerals Ltd., 177 p. (posted on www.sedar.com, April 21, 2011).
Ventures Resource Corp., 2002, 2001 Annual report: Ventures Resource Corporation, 32 p.
WGM Inc., 1977, Doyon Project, 1976 annual progress report, volume 1a, Blocks 1, 4, 5, 7, 8: Doyon, Ltd. Report 77-02a. (Report held by Doyon, Ltd., Fairbanks, Alaska).
WGM Inc., 1998, Veta property, 1997 annual report, volume 1: Doyon, Ltd. Report 98-10, 227 p. (Report held by Doyon, Ltd., Fairbanks, Alaska).
Reporters M.B. Werdon, R.L. Flynn, and D.J. Szumigala (ADGGS); D.J. Grybeck (Contractor, USGS)
Last report date 4/1/2012