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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  27-Mar-2022 by Nicole Barlow (NB)

Summary Help Help

BCGS Map 094E044
Status Prospect NTS Map 094E06W
Latitude 057º 28' 13'' UTM 09 (NAD 83)
Longitude 127º 19' 59'' Northing 6370963
Easting 599977
Commodities Gold, Silver Deposit Types H05 : Epithermal Au-Ag: low sulphidation
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Golden Furlong occurrence is located 3.25 kilometres southeast of Tuff Peak and 2.25 kilometres south-southwest of the Al (Bonanza) prospect (094E 079). Smithers is located 280 kilometres to the south. The prospect lies within the Omineca-Cassiar mountains in the west-central portion of the Toodoggone Gold Camp.

The Golden Furlong prospect is situated within a Mesozoic volcanic arc assemblage which lies along the eastern margin of the Intermontane Belt, a northwest-trending belt of Paleozoic to Tertiary sediments, volcanics and intrusions bounded to the east by the Omineca Belt and to the west and southwest by the Sustut and Bowser basins. Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Takla Group andesite flows and pyroclastic rocks. Takla volcanics have been intruded by the granodiorite to quartz monzonite Black Lake Suite of Early Jurassic age and are in turn unconformably overlain by or faulted against Lower Jurassic calcalkaline volcanics of the Toodoggone Formation (Hazelton Group).

The dominant structures in the area are steeply dipping faults which define a prominent regional northwest structural fabric trending 140 to 170 degrees. In turn, high angle, northeast-striking faults (approximately 060 degrees) appear to truncate and displace northwest-striking faults. Collectively these faults form a boundary for variably rotated and tilted blocks underlain by monoclinal strata.

The Golden Furlong prospect consists of a structurally controlled alteration and mineralization zone hosting native gold. Native gold is hosted in structurally controlled, generally linear zones of multiphase alteration. Peripheral wallrock alteration passes from quartz-clay-hematite towards the centre of the zone.

The geology of the Golden Furlong prospect is complex. The prospect is situated near the northern half of a caldera complex on the neighboring Al claims. A moderately thick section of mainly tuffaceous, subaerial volcanics with minor flow, intrusive and reworked epiclastic equivalents comprise lithologies underlying the occurrence (Assessment Report 10482). This sequence is part of the Attycelley Member of the Toodoggone Formation and appears to be nearly flat lying with occasional shallow dips. Intrusive units occur predominantly as dikes. The zone consists of intense, multiphase silicification, exposed as a spine of rock which can be traced for over 200 metres strike length and 25 to 60 metres width (Assessment Report 10482). At least five and as many as seven different phases of silicification and veining have been recognized. Buff to grey-brown chalcedonic silicification comprises the most dominant phase of alteration, which is cut by grey quartz-filling hydrothermal breccia fractures. Less common are hematitic breccia veins of silicification. The latest alteration consists of white to grey quartz veinlets and drusy, open-space infillings often coated with an iron stain. Spotty zones of intense clay and sulphate alteration (alunite) become increasingly common towards the northern end of the zone. The zone is hosted by feldspar hornblende crystal tuffs. Trace native gold was discovered in drusy quartz-filled vugs and along fractures at the southern tip of the zone (Assessment Report 10482).

In 1981, results from trenching of this zone were generally disappointing. Standard panel samples (1 by 5 metres) were taken from four trenches. Some of the better silver and gold assay results were from trenches 1 and 2. Sample 70759, from Trench 1, analyzed 1954 grams per tonne silver and 0.19 gram per tonne gold. Sample 71081, from Trench 2, analyzed 1268 grams per tonne silver and 0.09 gram per tonne gold; note these silver values taken from figure 4b are suspect. Most likely a typographical or conversion error has occurred, and they are a magnitude of 1 or 2 less than recorded (Assessment Report 10482). Assay results from a drill program conducted in the same year, consisting of two NQ holes totalling 395.5 metres, was also disappointing. Drillhole A82-2 yielded the highest assay results. A 0.5-metre interval from 177.6 to 178.1 metres, analyzed 10.2 grams per tonne silver and 0.95 gram per tonne gold. A 0.5-metre interval from 185.3 to 185.8 metres analyzed 1.5 grams per tonne silver and 0.425 gram per tonne gold (Assessment Report 10708). This drillhole is about 150 metres east and slightly north of Trench 1.

EMPR ASS RPT *10482, *10708, 34605, 39514
EMPR EXPL 1975-E163-E167; 1976-E175-E177; 1977-E216-E217; 1978-E244-E246; 1979-265-267; 1980-421-436; 1982-330-345; 1983-475-488; 1984-348-357; 1985-C349-C362; 1986-C388-C414; 1987-C328-C346; 1988-C185-C194
EMPR FIELDWORK 1980, pp. 124-129; 1981, pp. 122-129, 135-141; 1982, pp. 125-127; 1983, pp. 137-138, 142-148; 1984, pp. 139-145, 291-293; 1985, pp. 167-169, 299; 1987, pp. 111, 114-115; 1989, pp. 409-415; 1990, pp. 207-216
EMPR GEM 1969-103; 1971-63-71; 1973-456-463
EMPR GEOLOGY 1977-1981, pp. 156-161
EMPR MAP 61 (1985)
EMPR PF (Photogeologic Interpretation Map of the Northern Omineca area, Oct. 1964, Canadian Superior Exploration Limited-in 94E General File)
GSC OF 306; 483
GSC P 76-1A, pp. 87-90; 80-1A, pp. 27-32
ECON GEOL Vol.86, pp. 529-554, 1991
GCNL #23(Feb.1), 1985; #165(Aug.27), 1986
IPDM Nov/Dec 1983
MIN REV September/October, 1982; July/August, 1986
N MINER October 13, 1986
N MINER MAG March 1988, p. 1
WIN Vol.1, #7, June 1987
W MINER April, 1982
Forster, D.B. (1984): Geology, Petrology and Precious Metal Mineralization, Toodoggone River Area, North-Central British Columbia, Unpub. Ph.D. Thesis, University of British Columbia
Diakow, L.J. (1990): Volcanism and Evolution of the Early and Middle Jurassic Toodoggone Formation, Toodoggone Mining District, British Columbia, Ph.D. Thesis, University of Western Ontario
Chinapintza Mining Corp. (2020-09-18): NI 43-101 Technical Report, Geological Introduction to Chinapintza Mining Corp.'s Ranch Gold Project, Toodoggone Region, British Columbia, Canada
Chinapintza Mining Corp. (2021-06-22): Amended Technical Report: NI 43-101 Technical Report, Geological Introduction to Chinapintza Mining Corp.’s Ranch Gold Project, Toodoggone Region, British Columbia, Canada