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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  22-Aug-2020 by Karl A. Flower (KAF)

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Name MYRTLE, SHAMROCK, ETHEL, MYRTLE (L. 10501) Mining Division Cariboo
BCGS Map 093H003
Status Prospect NTS Map 093H04E
Latitude 053º 04' 36'' UTM 10 (NAD 83)
Longitude 121º 32' 45'' Northing 5881787
Easting 597414
Commodities Gold Deposit Types I01 : Au-quartz veins
Tectonic Belt Omineca Terrane Barkerville
Capsule Geology

The Myrtle occurrence in Lot 10501 on the summit of Barkerville Mountain is located about 2 kilometres northwest of Barkerville.

The Myrtle occurrence area lies within the Barkerville Terrane of the Omineca Belt. The Barkerville Terrane is in thrust contact with Triassic Quesnel Terrane rocks to the west and Hadrynian to Lower Paleozoic Cariboo Terrane rocks to the east. The Barkerville Terrane in this region is underlain by the dominantly metasedimentary rocks of the Hadrynian to Lower Paleozoic Snowshoe Group. In this area, the Paleozoic Snowshoe Group comprises limestone, phyllite and quartzite. These rocks have been regionally metamorphosed to greenschist facies.

Work History

In the early 1920s, intensive prospecting by E.E. Armstrong was conducted on the Myrtle group. In 1933, Newmont Mining Corporation did some stripping on the Myrtle group and Shamrock Gold Mines Limited drove the Shamrock adit 548 metres toward the downward projection of some veins on the surface of that group. The Shamrock adit was driven west from the portal on the outskirts of Barkerville. In 1941, Island Mountain Mines Company Limited purchased the Myrtle and that part of the Shamrock group which included the adit, and in 1941-42, drove the adit to the Martha (Lot 10508) and Cariboo (Lot 10512) claims, over a kilometre from the portal. The adit was driven toward the Martha (Lot 10508), Marie (Lot 10502), and Myrtle (Lot 10501) claims but did not reach the latter two. Many transverse veinlets were encountered on the southwest side of the Martha claim. In 1955, the Shamrock property included the Shamrock and Myrtle groups consisting of nineteen Crown-granted claims and fractions and was owned by Island Mountain Mining Company Limited.

The showing property, on option from Gold City Industries Ltd. by International Wayside Gold Mines Ltd., hosts an auriferous quartz-carbonate-pyrite stockwork within Snowshow Group rocks that yielded impressive gold assays from drilling conducted in 2002. In 2002, International Wayside drilled 5 core holes and reported assay results for three. A 17.68- metre intercept in drillhole M02-01 assayed 9.12 grams per tonne gold; drillhole M02-05 intercepted 0.18 metre of 61.79 grams per tonne gold (Press Release, International Wayside Gold Mines Ltd., October 24, 2002).

Late in 2003, International Wayside initiated a 15-hole diamond drill program that is expected to go into 2004. Several of the proposed drillholes will test the downdip potential of the new Ethel vein, where grab samples from a 2003 trenching program produced bonanza-grade assays.

International Wayside was reported to have drilled five holes on the Myrtle in 2004. Results of the drilling program indicate the of isolated, narrow, and weakly to moderately auriferous quartz veins hosted in metamorphosed and weakly altered, siliciclastic rocks of the Rainbow and Baker members.

In 2011, two diamond drill holes, totalling 211.2 metres, were completed on the area.

EMPR ASS RPT 26604, 26906, *27146, *27386
EMPR MER 2003-15
EMPR EXPL 2003-28,29; 2004-48
EMPR AR 1924-117; 1925-149; 1933-122; 1941-56
EMPR BULL 1, p. 62; *38, p. 88; 47
EMPR OF 2004-12
EMPR PF (Sketch Map of Shamrock Group, 1933; Mine Plan, Shamrock Gold Mines Ltd., 1933; Sutherland Brown, A., Holland, S.S. (1956): The Structure of Northeast Cariboo District, in 93H General Property File)
GSC MEM 181, p.26
GSC OF 844
N MINER Oct.25, Nov.4-10, 2002
PR REL International Wayside Gold Mines Ltd., Sept.12, Oct.24, 2002; Feb.27, Mar.4, Nov.10,17,18, 2003; Gold City Industries Ltd., Mar.3, Nov.18, 2003
Brown, J.A. (2009-06-10): 2009 Technical Report for the Cariboo Gold Project
Fier, N.E. (2009-08-17): NI 43-101 Technical Report Pre-feasibility Study of the Bonanza Ledge Deposit
Dzick, W. (2015-03-31): Cow Mountain NI43-101 Technical Report
Brousseau, K. (2017-05-16): Technical Report for the Cariboo Gold Project and Mineral Resource Estimate on the Barkerville Mountain Deposit
Beausoleil, C. (2018-06-14): NI 43-101 Technical Report and Mineral Resource Estimate Update for the Cariboo Gold Project
Beausoleil, C. (2019-07-11): NI 43-101 Technical Report and Mineral Resource Estimate Update for the Cariboo Gold Project
Morgan, G.J. (2019-09-17): NI 43-101 Technical Report - Preliminary Economic Assessment of the Cariboo Gold Project