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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  17-Jul-2013 by Nicole Barlow (NB)

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NMI 093A7 Au1
BCGS Map 093A038
Status Developed Prospect NTS Map 093A07E
Latitude 052º 18' 20'' UTM 10 (NAD 83)
Longitude 120º 34' 43'' Northing 5797785
Easting 665083
Commodities Gold, Silver, Copper, Zinc, Lead Deposit Types I01 : Au-quartz veins
L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Omineca Terrane Quesnel
Capsule Geology

The Frasergold deposit is located 100 kilometres east of Williams Lake in the McKay River Valley. The property is road accessible by a series of paved and gravel surfaced roads that lead east northeast from Williams Lake to the village of Horsefly and along the Horsefly River to Mackay River. Recent logging activities have provided a series of tracks that provide good access to most of the exploration areas on the property.

The area is underlain mainly by Middle-Upper Triassic Nicola Group black phyllite with minor interbedded siliceous sediments. These rocks form the upright northeast limb of the major northwesterly trending Eureka Syncline. Locally, the rocks form asymmetric drag folds that contain metamorphically derived quartz sweats in the hinges. Rotation of these folds by axial plane crenulation cleavage formed minor folds plunging slightly northwest of the earlier folds. Gold mineralization is apparently associated with the youngest structures.

The northwest trending, shallowly plunging, Eureka Syncline and Perseus Anticline are the dominant interpreted structures in the region. Well developed, northeast striking, near vertical extension joints are clearly manifested in the drainage pattern of the Eureka Syncline. Towards the nose of the syncline,southeast of the Frasergold project area, the syncline becomes overturned to the southwest with axial planes dipping steeply northeast. Northeast of MacKay River the northeast limb is also overturned to the southwest, however, the syncline is upright in the area of the property. The core of the Eureka Syncline is occupied by Upper Triassic Nicola Group mafic volcanic rocks consisting of basalt, augite porphyry flows, tuffs and volcanic breccias that have been metamorphosed to a low grade. The contact with the underlying black phyllitic sediments of the Middle-Upper Triassic Nicola Group has been interpreted as a fault.

The northwest trending MacKay River valley appears to mark a major zone of vertical or near vertical fracturing. At this location the Nicola Group is sandwiched between two more competent units; younger intrusives and volcaniclastics to the south and older amphibolites (Upper Paleozoic Crooked Amphibolite), schists and gneisses (Upper Proterozoic to Paleozoic Snowshoe Group) to the north and east. Shearing and faulting appears to have been concentrated in the incompetent phyllite units striking along the valley.

The Frasergold gold-quartz zone is hosted within graphite rich (5-40 per cent) phyllitic sediments and is located on the east limb of the syncline, whereas the Eureka Peak gold-sulphide mineralization (093A 011) is found closer to the core of the fold, near the base of volcanics that overlay the sediments. The mineralization is located in a 200 to 300 metre wide zone of "knotted phyllite" which is made up of coarse elongated carbonate porphyroblasts in a lustrous, well-laminated phyllite. Gold mineralization typically occurs near the base of the "knotted phyllite". Zones within this sequence contain 10 to 30 per cent quartz veins. Most of the veins parallel the S1 cleavage which strikes 130 degrees and dips between 35 and 85 degrees west. The veins contain up to 5 to 10 per cent pyrrhotite and pyrite in a quartz-dolomite-siderite gangue. A few have trace amounts of sphalerite, chalcopyrite, galena and coarse-grained gold. Gold tends to occur in quartz veins with coarse particulate gold occurring in segregations of stringers, veins, boudins and mullions. Gold has also been commonly observed as fine anhedral grains set in quartz often near the margins of veins. The gold also appears to be associated with sulphides, including pyrrhotite, pyrite and minor chalcopyrite and sphalerite. Petrographic studies show that a major part of the gold occurs with medium to coarse grained pyrite and pyrrhotite aggregates throughout the mineralized zone. Overall the sulphide content of the Frasergold zone varies from trace to 12 per cent sulphides, and averaging about 2-3 per cent sulphides. Pervasive low grade gold mineralization is also found within the knotted phyllite strata where quartz is absent, however, the gold also appears to be associated with sulphides within the phyllitic strata. In most or all cases the phyllitic metasediments are graphite rich, with trace to 3 per cent chlorite alteration.

In addition, copper mineralization occurs on the property as disseminations within the sheared marginal phase of a mafic sill unit and as porphyry copper type mineralization within granitic rocks.

Inferred (geological) reserves at Frasergold have been reported to be 11 million tonnes grading 1.85 grams per tonne gold to depths of 100 metres and over a 3 kilometre strike length (George Cross Newsletter #37, 1992).

The first record of work being conducted in the vicinity of the Frasergold property was in the late 1970s by C.E. Gunn who prospected the area after researching historic references to the placer gold potential of the region. During 1978 and 1979 he staked claims and prospected the area to cover a panned gold anomaly discovered in Frasergold Creek. From 1980 to 1982 the ground was optioned by Keron Holdings Ltd. and NCL Resources Ltd. A geology map was produced after preliminary soil and rock geochemical surveys were completed over the property, with results revealing a 10 kilometre long zone containing anomalous gold values from soil samples that was suspected to have a stratigraphic control. In 1983, Eureka Resoureces Inc. acquired the property and optioned it to Amoco Canada Petroleum Co. Ltd. During 1983 and 1984 Amoco collected rock and soil geochemical samples and conducted limited electromagnetic and magnetic surveys. Amoco also drilled 14 diamond-drill holes totalling 4519 metres, with 12 of the drillholes producing coarse visible gold. Amoco terminated the option agreement at the end of these programs and returned the property to Eureka. Eureka continued exploring the Frasergold property in 1985 and 1986 and completed further soil and rock chip geochemical sampling, trenching and bulk sampling, reverse circulation and diamond drilling, metallurgical testing and an induced polarization (IP) survey. Four holes totalling 406.5 metres were completed by reverse circulation drilling, and eighteen diamond-drill holes, totalling 2021 metres were completed in three areas. A surface bulk sampling program was completed in 1985 by selecting eight sites for excavation. A total of 56 samples were collected and analyzed for gold content by fire assay. One sample, 86-12-2A from the Jay zone, was submitted to Coastech Research Inc. who milled the material and completed cyanidation testing on the sample. Results from the cyanidation work were compared to the standard fire assay analyses.

In 1987, Southlands Mining Corporation undertook an option on the Frasergold property, with Eureka as operator. Southlands constructed and sampled eight trenches totalling 660 metres, and completed 21 reverse circulation holes totalling 1710 metres. In late 1987, Southlands optioned a portion of their interest to Sirius Resources Corp. Sirius completed 17 diamond-drill holes totalling 1536 metres, drilled 37 reverse circulation holes totalling 2456 metres, and excavated 184 metres of underground workings to provide 524 tonnes of material for bulk sampling. In the fall of 1988, Sirius completed work in the Eureka Peak zone (093A 011), collecting 478 soil samples over a closely spaced grid, collecting 27 rock chip samples from hand trenches and drilling six diamond-drill holes totalling 862 metres. During September 1989, Eureka completed a program of underground channel sampling (284 samples), muck sampling (74 samples) from untested rounds, drill core sampling (297 samples) and relogging and geological mapping of underground workings.

In 1990, Eureka entered into a joint venture agreement with Asarco Company of Canada Ltd. (Asarco). During the period 1990 and 1991, Asarco drilled 25 diamond-drill holes totalling 4687 metres, and 156 reverse circulation holes totalling 15,720 metres. Four 1.25 ton bulk samples were collected in 1990 for metallurgical testing by Bacon, Donaldson and Associates Ltd. In 1991, the underground workings were lengthened by 114 metres and these workings produced 1591 tons of material that was divided into nine lots for off-site milling. In January 1991, the mining, geological and geotechnical engineering firm James Askew Associates, Inc. of Englewood, Colorado was commissioned by Asarco to conduct a prefeasibility study of the Frasergold project. The Askew report does not take into account economic, mining, metallurgical, environmental, social or governmental factors. As part of this study, Askew completed “In Situ Reserves/Resources” for the project using hand drawn polygonal methods. The basis for drawing these mineralized envelopes was data collected by Asarco and others which is believed to be reliable. Askew used a 0.03 oz/t gold cutoff with a minimum true width thickness of three metres. Assays greater than 0.60 oz/t gold were cut to 0.60 oz/t gold. Zones of gold mineralization were extended half-way to the adjacent section and were extended 75 metres downdip. A specific gravity of 2.7 was used in the calculations. Based on these parameters, Askew (1991) summarized the gold mineralization at the Frasergold property as 6,612,675 tons (5,999,019 tonnes) of mineralized material at an average grade of 0.055 oz/t gold (1.71 grams per tonnes) to represent 362,825 ounces (11,283,857 grams) of gold. Askew (1991) does not categorize the mineralized material due to “the comparatively small amount of geological and assay data for such a long strike length”. The volume and gold content estimates used by Askew (1991) do not conform to current National Instrument 43-101 standards. In 2007, Hawthorne Gold Corp. conducted a major exploration program on the property. A diamond drill program was laid out to test four previously defined zones of interest; including the Main zone, the Grouse Creek West zone, the Grouse Creek East zone and the Frasergold zone. A total of 16 HQ core size drillholes totalling 3615 metres were drilled. Between 1980 and 2007, a total of 39,582 metres of drilling in 344 holes has been completed on the property, along with 294 metres of underground drifts to provide access for bulk sampling and metallurgical testing.

In 2008, Hawthorne Gold Corp. and Eureka Resources Inc. completed a diamond drilling program consisting of 58 holes totalling 10,405 metres. Drillhole FG08-362C intersected 82.28 metres grading 0.75 gram per tonne gold, including 5.88 metres grading 3.97 grams per tonne gold (Hawthorne Gold Corp. website

In October 2009 Hawthorne Gold released an updated resource estimate. Combined Measured and Indicated resources for the Main zone was reported as 34.08 million tonnes grading 0.559 gram per tonne Au. Combined Inferred resources for the Main, Northwest, and Southeast zones was reported as 75.31 million tonnes grading 0.507 gram per tonne Au (News Release October 1, 2009

In 2011, Teslin River Resources Corp. performed a soil sampling program at the Frasergold project. The geochemical program sampled a total of 27 line kilometres conducted over three zones within three separate grids. Results from this grid included values ranging up to 2.24 grams per tonne gold and 0.12 per cent copper. These results suggest a strong association of copper sympathetic to the gold values (V STOCKWATCH, January 16, 2012).

EMPR EXPL 1981-108; 1983-377; 1985-C260; 1986-B50-51; 1987-C246
EMPR FIELDWORK 1986, pp. 135-142
EMPR INF CIRC 1989-1, p. 20
EMPR MAP 65 (1989)
EMPR OF 1987-9; 1989-14, 20; 1990-31; 1992-1
EMPR P 1990-3; 1991-4, pp. 186,187
EMPR PF (Sirius Resource Company Filing Statement Oct. 1988; *Frasergold Project-Property description, Asarco Inc. and Eureka Resources Inc.; MacKay River Pelitic Suite, 1984 (10 pages); Campbell, K.V. (1984): Brief Report on the Structural Geology at the Frasergold Project; Report on Frasergold property, 1985 (partial report, pages 25-42 only))
EMPR PF Cyprus Anvil (Coates, J.A. (1967-08-01): Report - Eureka Mountain; Hurd, G.M. (1966-01-12): Summary Report - Eureka Project; Taylor-Helicon: Copper Geochemistry Map - Cirque 2 Mineralized Zone - Eureka Project; Unknown (1966-02-09): Geomagnetic Survey Map - Eureka Peak Area; Unknown (1966-02-09): Surface Geology Overlay Map - Eureka Peak Area)
EMPR PF Rimfire (unknown (1978-01-01): E-W Geological Cross Section Map - North of Crooked Lake - Frasergold; Belik, G.D. (1982-12-10): Summary Report on the Frasergold Property; unknown (1983-01-01): Report - Eureka Project; unknown (1983-10-11): Diamond Drill Hole Record - FBC 83-2 - Frasergold; Berry, F.L. (1983-11-04): Re: Au claims - Adjacent to Frasergold; Dujardinun, R.A. (1983-11-15): Re: Eureka Project; unknown (1984-01-01): Diamond Drill Hole Summary - FBC-83-1 - Frasergold; unknown (1984-01-01): Diamond Drill Hole Summary - FBC-84-11 - Frasergold; unknown (1984-01-01): Diamond Drill Hole Report - Frasergold; Amoco Ltd. (1984-09-09); Diamond Drill Hole Record - FBC 84-7 - Frasergold; Amoco Ltd. (1984-09-26): Diamond Drill Hole Record - FBC 84-11 - Frasergold; unknown (1985-01-01): Proposed D.D.H. 1985 Notes - Eureka Property; Kokonis, K. (1985-02-12): Re: Kusk Mineral Claims; A.C.P.C.L. (1985-03-01): 1500m Level Plan Map - Geology and Assays A Zone - Frasergold Project; A.C.P.C.L. (1985-03-01): Surface Projection Map - D.D.H. Geology and Significant Assay Results - Frasergold Project; A.C.P.C.L (1985-03-01): Surface Projection Map - D.D.H. Geology and Significant Assay Results - Frasergold Project; A.C.P.C.L. (1985-03-01): 1500 m Level Plan Map - Geology and Assays A Zone - Frasergold Project; unknown (1985-05-13): Re: Frasergold notes; Eureka Resources Inc. (1985-05-17): Plan Projection Map of D.D. Holes - Frasergold Property; Kerr, J. (1985-07-01): Soil Geochemistry and Location Map - Gold in ppb - Frasergold; Eureka Resources Ltd. (1987-11-03): Geology Map - Frasergold Project; unknown (1988-01-01): Summary Drill Hole Data - Frasergold Project; unknown (unknown): Comparative Analytical Data - Frasergold Project; Eureka Resources Inc. (unknown): Diamond Drill Hole Data Map - Frasergold; unknown (unknown): Structural Geology Sketch Map - Frasergold; unknown (unknown): Map of Major Tectonic Features and Gold Occurrences - Cariboo-Quesnel Gold Belt; Campbell, R.B. (unknown): Map of General Geological Setting of the Frasergold Property; unknown (unknown): Structural Geology Map - Frasergold)
EMR MIN BULL MR 223 B.C. 202
EMR MP CORPFILE (Eureka Resources, Inc.; Amoco Canada Petroleum Company Ltd.; Southlands Mining Corporation)
GSC MAP 12-1959; 1-1963; 1424A; 1538G
GSC OF 574; 844
GSC P 69-1A p.18
GBC Report 2009-1 pp.66
GCNL #177,#201,#203,#219, 1983; #10,#90,#166,#179,#219, 1984; #69, #135, 1985; #40,#165,#228, 1986; #7,#25,#74,#75,#100,#116, #129, #157,#177,#228,#239,#240, 1987; #18,#19,#35,#43,#50,#68,#107, 1988; #80,#189(Oct.2),#236(Dec.8), 1989; #139(Jul.19), #202(Oct.18),#224(Nov.20), 1990; #32(Feb.14),#164(Aug.26), 1991; #37(Feb.21),#132(July 9), 1992
IDPM Mar/Apr 1984; Nov/Dec 1985
N MINER Oct.27, 1983; Jan.19, Nov.15, 1984; Mar.7, Apr.18, Jul.11, 1985; Mar.17, Dec.15, 1986; Feb.9, Apr.27, Sept.28, Dec.21, 1987; June 18, July 30, 1990; Mar.4, 1991; Mar.9, 1992, Oct.1, 2009
V STOCKWATCH June 4,17, July 3, Aug.27, Sept.4, Dec.14,15, 1987; Apr.26,27, May 1, 1989; Jan.16, 2012
W MINER April, 1984
Placer Dome File