The Barkerville area claims consist of three road accessible claims, staked by Eastfield in 2013 and 2014, that are located 20 kilometres north of Wells in central BC. The claims are highly prospective and have had little exploration over the years. Placer gold mining is documented and still continuing on a small scale on and around the claims. A rush of exploration in the 1980's and 1990's focused on the search for Besshi type VMS deposits in the Antler Formation of the Mississippian to Permian Slide Mountain Terrane. The Big Valley project is 100% owned by Eastfield.
The well known placer (~4 million ounce production) and lode (~1.2 million ounce production) gold deposits of the Wells/Barkerville area are hosted within meta-sedimentary rocks of the Upper Proterozoic-Paleozoic Barkerville Group which structurally underlies the Slide Mountain Terrane. Barkerville Gold Mines Ltd. (TSX-V: BGM) has published resources at Cow Mountain comprising: Measured + Indicated 1.04 million ounces gold grading 2.0 g/t Au and inferred resources of 3.94 million ounces grading 2.74 g/t Au. Additional but smaller resources occur at the Bonanza Ledge deposit which grades 7.0 to 8.0 g/t Au hosted in a massive pyrite lens. These massive pyrite lenses tend to occur on the flanks of vein systems.
The properties recently acquired share characteristics with the deposits in Barkerville such as quartz-iron carbonate alteration and an association with base metal sulphides, with peripheral zones of strong iron-carbonate alteration.
The property was staked to cover three different targets.
The first target, called Lottie, has massive sulphide boulders of volcanogenic massive sulphide origin. The source of this mineralization could very likely be close and under a layer of overburden. In 2000 Hudson Bay Exploration and Development explored this area following a field inspection in September 1999 of the area where a prospector had discovered a mineralized angular boulder which assayed 24.3% copper and 19.6 grams per tonne silver (west of Lottie Lake). Numerous trenches also include ferricrete suggesting proximity to a sulfide rich source. The Hudson Bay Exploration and Development report stated that trench samples averaged 7.0% to 10% copper, 8 to 12 g/t silver and trace gold, lead and zinc. Drill core from the 2000 program only had a small portion sampled.
The second target, called Golden Sky was discovered near a recent logging road by crew who were conducting reconnaissance exploration. This target is located to the west and outside the area explored by Hudson Bay Exploration and Development. A gossan was noticed on a road cut and when examined determined to be rusty rhyolite cut by narrow quartz veins. The initial grab sample returned an analysis of 1.51 g/t gold along with 1204 ppm As, 1313 ppm Sb, 1.01% Zn and 0.48% Pb. Subsequent further sampling returned comparable results and suggested a shear zone trending at 070º.
The third target, called Khan-Khan, also cover part of a large land package that was explored by Hudson Bay Exploration and Development. The target deposit type at Khan Khan is either a massive sulfide of the Cyprus type or alternately a structurally focussed precious metal vein deposit similar to gold occurrences closer to Barkerville. To quote the Hudson's Bay Exploration and Development Company summary report of 2001 "Angular mineralized boulders were found along the road cut at the Khan till anomaly...Boulders are described as being a gossanous dark grey mafic intrusive (subvolcanic), possibly slightly sheared, contained up to 5% chalcopyrite, 1% pyrrhotite, and trace bornite. Assays returned values of 0.40% to 0.56% Cu, with low Ag, Ni and Co credits. Rusty basalt boulders outcropping in the immediate area contained disseminated trace bornite, chalcopyrite and pyrrhotite, but failed to yield significant assay results" An active placer gold mine exists approximately one kilometer east of the Khan Khan claim.
Gold mineralization was first discovered on the property in 1981 by Esso Minerals while following up a government regional geochemical survey. There are two targers on the property.
The first target, called Antler, contains a rubbly outcrop of pyritic, iron carbonate altered volcanic rock returned an assay of 0.359 oz/ton (12.3 g/t) gold across a 1.1 m sample width associated with elevated arsenic. A soil sampling grid over this area outlined a 500 m long arsenic anomaly with the mineralized outcrop at the south end of the anomaly. This work was not followed up. Another discovery of mineralization was made by a prospector in 1997 and is approximately 1.5 km northwest of the Esso discovery. Float boulders were located along a road cut. Two grab samples were taken with the following analytical results: 97-RK10: 4.72 g/t Au, 330 ppm As, 6.96% Cu, 0.85% Zn; and 97RK11: 4.80 g/t Au, 100 ppm As, 1.90% Cu, 0.55% Zn. Subsequent soil and stream geochemical sampling indicated a broad area of elevated gold and arsenic values. A hand trench on one soil anomaly uncovered a 6.0 m long outcrop of faulted, Fe-carbonate altered rock with a zone of quartz-carbonate veining across 2.0 m of the trench. A sample across one metre of the veining returned 0.23 g/t Au, 1985 ppm As, 46 ppm Cu and 84 ppm Zn. No detailed geophysical surveying or drill testing has been completed on this extensive area of anomalous geochemical sampling.
The second target, called 14 Mile Creek, is located where massive sulphide float boulders were discovered by a prospector in August, 1996. He outlined an area of 150 m by 300 m in which he located numerous ferricrete encrusted boulders many of which had massive sulphide cores of fine grained pyrite with lesser chalcopyrite. Cobbles and boulders of fine grained massive magnetite were also found at this site. Selected samples from the site taken in 1997 gave the following results:
Soil and stream sediment geochemical sampling was carried out in a sporadic manner and did define an area of anomalous arsenic in the vicinity of the float boulders; gold was not analysed in this sampling. In 1987 Eureka Resources Inc. undertook EM geophysical surveys over a portion of the property on a reconnaissance scale and outlined three linear anomalies one of which was 300 m in length and open ended. No further work has been undertaken on the property. The large area of the mineralized boulders indicates a good potential for discovering significant mineralization in bedrock by applying exploration methods that will penetrate the overburden.
On the CR property, Noranda carried out a regional exploration program following up a BC government geochemical sampling survey and located an area strongly anomalous in gold and arsenic in an area of historical placer gold mining. Of note in their initial work was the discovery on a number of logging road cuts and landings of chalcedonic quartz veinlets and vugs associated with red-brown weathered quartz-carbonate altered zones. Follow-up grid soil sampling outlined a 1.0 km by 0.5 km arsenic anomaly with scattered anomalous gold values up to 1300 ppb gold. No outcrop was located on the grid. Heavy mineral soil/till sampling by Noranda along road cuts elsewhere on the CR property returned highly anomalous gold values up to 3,300 ppb gold in areas with little to no outcrop. No further exploration work has been undertaken since 1989 on the property and the source of the extensive geochemical anomalies remains unknown.
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