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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  02-Aug-2021 by George Owsiacki (GO)

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NMI 094D16 Au4
Name MCCONNELL CREEK, DAHL, JENSEN Mining Division Omineca
BCGS Map 094D088
Status Past Producer NTS Map 094D16W
Latitude 056º 50' 59'' UTM 09 (NAD 83)
Longitude 126º 28' 47'' Northing 6303475
Easting 653701
Commodities Gold, Platinum Deposit Types C01 : Surficial placers
Tectonic Belt Intermontane Terrane Quesnel, Plutonic Rocks
Capsule Geology

The McConnell Creek placer occurrence, located on one of the original placer leases held by P. Jensen, lies near the confluence of Jensen and McConnell creeks, approximately 161 kilometres north-northwest of the community of Germansen Landing. The occurrence includes all the placer workings along the 9 kilometre length of the creek. These placer occurrences were discovered in 1899 and have been worked intermittently since then.

The regional geology is similar to that of the Gerle Gold occurrence (094D 006) located approximately 3 kilometres to the east.

Widespread placer gold, with minor platinum, occurs within the sands and gravels along the entire length of McConnell Creek. Most of the placer mining has been done on the gravel benches (the Jensen and Dahl benches) that border the creek. These benches occur from 3 kilometres upstream of the Ingenika River confluence to the lowermost of the McConnell lakes (Geological Survey of Canada Memoir 251). The auriferous sands and gravels are underlain by a layer of concretionary silt, probably formed by an old Tertiary lake (Property File - Holbrooke, G. L., 1960).

The gravels are crossbedded and poorly sorted, commonly a mixture of well-rounded boulders, cobbles, pebbles and sand interspersed with layers and lenses of sand. The gold is erratically distributed in various layers from the surface down to the silt layer. The depth from the surface to the silt layer is uncertain, but has been reported to be 42 metres. Bedrock appears to be undivided volcanic rocks of the Upper Triassic Takla Group near contacts with Early Jurassic monzodioritic to gabbroic intrusive rocks.

The gold occurs as small, rounded grains or as flattened nuggets. The gold is accompanied by small amounts of flake platinum and abundant black sand. An alloy of silver and mercury was also recovered from these gravels.

In the period from 1931 to 1941, production is recorded as 37,708 grams (1100 ounces) of gold (National Mineral Inventory - 094D/16 Au1). There is no record of the amount of gold removed from the creek prior to 1931.

During 1965, Columbia Placers Ltd. churn drilled 42 holes to test the Jensen and Dahl benches. The drilling indicated that most of the gold lies in the upper few feet and the deeper gravels are essentially barren.

The Dahl bench contains an indicated 152,910 cubic metres at 0.666 gram per cubic metre ($0.8056 per cubic metre based on the 1965 gold price of $1.21 per gram) and the Jensen bench contains an indicated 229,366.5 cubic metres at 0.465 gram per cubic metre ($0.5624 per cubic metre at $1.21 per gram) (National Mineral Inventory - 094D/16 Au1).

Bibliography
EMPR AR 1908-67,81,82,83; 1961-128; 1965-250
EMPR BULL 2, 28 pp. 43-45
EMPR FIELDWORK 2001, pp. 303-312
EMPR GEOFILE 2000-2; 2000-5
EMPR OF 2001-01
EMPR PF (Wells, J.H. (1949): Report on a reconnaissance survey of the McConnell Creek Placers; *Holbrooke, G.L. (1960): Report on McConnell Creek Property; Holbrooke, G.L. (1965): Maps and plan of McConnell Creek Property; *Unpublished anonymous sketch map of placer leases along McConnell Creek, unknown year; Prospectors Report 1996-14 by Robin Day)
EMPR PF Placer Dome (Placer Dome (1988): Pole-Dipole Array sheets McConnell Creek; W.G. Smitheringale (1988): Plan, 1988 Trench Assays map; W.G. Smitheringale (1990): South Grid Geology McConnell Creek; W.G. Smitheringale (1990): Central Grid Compilation Map McConnell Creek; W.G. Smitheringale (1990): Central Grid VLF-EM Profiles McConnell Creek; W.G. Smitheringale (1990): South Grid Geology McConnell Creek Fig. 89-4; G. Gutrath (1979): Report on McConnell Creek Placer Property, NE BC)
EMPR PF Rimfire (Gerle Gold Mines (1962): Re: Gerle Gold)
EMR MP CORPFILE (Columbia Placers Ltd.)
GSC MAP 962A
GSC MEM 251, p. 56
GSC OF 342
GSC P 76-29

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