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File Created: 28-May-1998 by Larry Jones (LDJ)
Last Edit:  02-Aug-2018 by George Owsiacki (GO)

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NMI
Name FORT, SPECULARITE LAKE, ELDEN Mining Division Omineca
BCGS Map 093K063
Status Showing NTS Map 093K12E
Latitude 054º 37' 14'' UTM 10 (NAD 83)
Longitude 125º 34' 48'' Northing 6055627
Easting 333426
Commodities Copper, Silver, Molybdenum, Lead, Zinc, Gold Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Cache Creek
Capsule Geology

The Fort occurrence is situated 1 kilometre east of Specularite Lake, approximately 88 kilometres northwest of Fort St. James.

The Fort property occurs in an area underlain dominantly by metasedimentary and metavolcanic rocks of the Mississippian to Triassic Cache Creek Group and by ultramafic bodies of ophiolitic character related perhaps to the oceanic Cache Creek Group. These ultramafic bodies, known as the Permian to Triassic Trembleur Intrusions, are composed dominantly of dunite and peridotite, but pyroxenite and gabbro are also present in some areas. The area is also underlain by Jurassic diorite and quartz diorite and Eocene volcanics of the Endako Group.

A new logging road exposed copper-molybdenum-silver mineralization in a 700 by 400 metre area. Eight grab samples averaged 0.34 per cent copper, 0.017 per cent molybdenum and 72.3 grams per tonne silver. Three of the samples reported values ranging from 0.36 to 1.01 per cent zinc and 0.33 to 0.48 per cent lead. The highest gold value was 98 parts per billion. The mineralized area is supported by high soil sample values (Northern Miner, May 4, 1998). Chalcopyrite and molybdenite occur as disseminations and fracture fillings in association with pyrite-pyrrhotite.

Rocks from the Specularite Lake showing are strongly altered monzonite. Alteration is an intense form of potassium alteration that includes abundant secondary potassium feldspar, green biotite and secondary hydrothermal silica. A rock sample 3 kilometres northwest of the showing is an altered and brecciated monzonite.

The Specularite Lake showing was discovered by Elden Nyberg and the area was staked by Richard Haslinger in 1997. In 1998, Ascot Resources Ltd. and Eastfield Resources Ltd. optioned the property and conducted geological mapping, rock and soil sampling and induced polarization and ground magnetometer surveys, the results of which suggested the potential large porphyry-style hydrothermal system. Copper-molybdenum and coincident chargeability anomalies outlined 300 by 900 metre and 300 by 600 metre exploration targets (Assessment Report 25760).

In 2010, Torch River Resources Ltd. optioned the property and carried out geochemical and total field magnetometer surveys. Results suggest north-northwest trending, steeply east-dipping mineralization zones defined by copper-silver-gold-molybdenum in soil and strong positive magnetometer anomalies in the southeast and central portions of the Elden grid (Assessment Report 31570). Follow-up work later that year consisted of geochemical and magnetometer surveys. Rock chip assay highlights include 3911 parts per million (ppm) copper, 233 ppm lead, 286 ppm and 16.1 ppm silver in sample ELD-10-AR-54. This work further outlined the Elden hydrothermal breccia, thought to be related to a copper-silver-gold-molybdenum porphyry system (Assessment Report 31904).

In 2011, Torch River Resources Ltd. drilled six diamond-drill holes totalling 1412.33 metres. Significant intercepts include 0.108 per cent molybdenum, 0.12 per cent zinc, 4.7 grams per tonne silver and 234 ppm vanadium over 12 metres in DDH-1, and 0.24 per cent copper and 10.6 grams per tonne silver over 10 metres in DDH-6 (Assessment Report 32917).

Bibliography
EMPR ASS RPT 25760, 31570, *31904, *32917
EMPR EXPL 1998-43
EMPR FIELDWORK 1992, pp. 475-482; *1998, pp. 33-68
EMPR OF 1999-11
EMPR PF (Eastfield Resources Ltd. Website (June 1999): Fort Project, 4 p; (Sept.1999): Babine Lake, 4 p.)
GSC MAP 631A; 907A; 1424A; 5313G
GSC MEM 252
GSC OF 2593; 3183
GSC P 90-1F, pp. 115-120; 91-1A, pp. 7-13
GCNL #6(Jan.9), #23(Feb.3), #66(Apr.3), #112(Jun.11), 1998
N MINER *May 4, Nov.9, 1998
PR REL Eastfield Resources Ltd., Jan.7, Feb.2, Mar.30, May 20, Jun.3, Jul.6, Oct.19, 1998; Mar.8, 1999; Torch River Resources Ltd., Apr.12,26, Jun.28, 2010; Jul.25, Sept.7, 2011

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