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File Created: 23-Aug-2009 by George Owsiacki (GO)
Last Edit:  10-Sep-2009 by George Owsiacki (GO)

Summary Help Help

NMI
Name ST. LAWRENCE CREEK Mining Division Cariboo
BCGS Map 093H003
Status Showing NTS Map 093H03W
Latitude 053º 02' 07'' UTM 10 (NAD 83)
Longitude 121º 26' 19'' Northing 5877340
Easting 604689
Commodities Gold Deposit Types C01 : Surficial placers
C02 : Buried-channel placers
Tectonic Belt Omineca Terrane Barkerville
Capsule Geology

The St. Lawrence Creek placer property is located along St. Lawrence Creek, about 6 kilometres southeast of Barkerville. It is accessed by driving east from Wells along Highway 26, then along the Bowron Lake Road to the 3100 Road. After 12 kilometres along the 3100 Road, turn west and drive about 750 metres along a steep access road to reach the bridge crossing over St. Lawrence Creek.

Placer gold deposits of the Quesnel Highland region, including the former rich producers of the Barkerville Camp, have accounted for a large proportion of British Columbia's alluvial gold production. With the exception of a few producers in the Wingdam area, which are underlain by Upper Triassic sediments correlative with the Nicola Group, almost all the deposits are underlain by the Upper Proterozoic to Lower Paleozoic Snowshoe Group. These rocks have been metamorphosed to greenschist facies and are predominantly metasedimentary.

Placer gold deposits in the region are generally found in relatively young Pleistocene gravels. The morphology and mineral associations of the gold suggests that it was derived locally, the most obvious sources are the numerous auriferous veins in the Downey succession of the Snowshoe Group.

Fourteen samples of gravel, ranging in size from 0.04 to 0.16 cubic metre were collected from various points along a 660 metre length of St.Lawrence Creek. The samples were either sluiced or panned and the final concentrate was saved for further analyses. Most samples were taken from the creek bed at depths ranging from 0.35 to 0.50 metre and ten out of the fourteen samples contained either: 1) dust - particles barely visible to the eye; 2 ) micro to very coarse colours - particles easily visible in the pan up to pieces to 1 square millimetre; 3) fine flake - greater than 1 millimetre to 1.5 square millimetre.

"Data from the Cariboo mining district indicate that supergene leaching of gold dispersed within massive sulphides by Tertiary deep weathering followed by Cenozoic erosion is the most likely explanation for the occurrence of coarse gold nuggets in Quaternary sediments" (Exploration in British Columbia 1989, page 147).

Past workings on St. Lawrence Creek consist of small hydraulic areas, shaft exploration (early 1980s), and open pit exploration. In 1993, surficial geological mapping was conducted and samples were sluiced and/or panned from placer leases along St. Lawrence Creek on behalf of owner, B.A. Jones. In 1995, a seismic, gravity and magnetic survey was conducted on behalf of B.A. Jones. In 1998, a seismic survey was also completed.

Bibliography
EMPR ASS RPT *23126, 24285, 25832
EMPR BULL 28; 38; 47
EMPR EXPL 1989 p.147
GSC OF 844
EMPR PFD 681606

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