The 1500 and 1650 Trenches showing is located about 3 kilometres west of Roundtop Mountain, on the west side of Cunningham Creek about 20 kilometres southeast of Barkerville. Access is via well maintained forest service and logging roads.
The showing is near the north end of a belt of mineralized quartz veins, hosted by Downey succession quartzites and phyllites of the Upper Proterozoic-Paleozoic Snowshoe Group, that extends for 5.5 kilometres north-northwest from the past-producing Cariboo Hudson mine (093A 071). The showing comprises several quartz veins and lenses, some mineralized with pyrite and galena, that were exposed in two exploration trenches about 150 metres apart. Assay values of 8.15 and 4.5 grams per tonne gold are reported across 1 metre widths from the 1500 and 1650 trenches, respectively (Assessment Report 19793).
Limestone-hosted galena and sphalerite mineralization was exposed in trenches at the A-Zone located about 292 metres north-northwest of the 1500 Trench. Coast Interior Ventures apparently drill tested the A-Zone before 1974, but the work was not submitted for assessment.
In 1989, Loki Gold Corporation conducted an exploration program on the ground now within the Golden Cariboo property. This included detailed geological mapping, soil sampling, trenching and sampling, followed by drilling on the Jewellery Shop, Hibernian and B-Zone polymetallic vein showings (093A 051) near the confluence of Craze Creek and Peter Gulch Creek. They also drilled the Switchback showing (093A 183) on the west side of Cunningham Creek. In 1978, Riocanex attempted to drill the A-Zone to test the downdip extension of carbonate-hosted galena and sphalerite mineralization encountered in a trench, but lost all holes in extremely fractured and weathered ground. The following summer extensive trenching was conducted along grid lines on both sides of Cunningham Creek. This included large trenches on six levels at the A-Zone.
During 2000 through 2008, Golden Cariboo Resources Ltd. completed programs of prospecting, geological mapping, geochemical (rock, soil, moss and stream sediment) sampling, ground magnetic and self potential surveys, trenching and 60 diamond drill holes, totalling 28,710.0 metres on the area as the Golden Cariboo property. A complete summary of exploration programs can be found at the Cariboo Hudson (MINFILE 093A 091) occurrence.
In 2004, Golden Cariboo Resources Ltd. drilled three holes (GC04-03, 04 and 05) from the same collar on the A-Zone. The drillholes did not intersect the mineralized limestone target due to difficult ground; two of the three holes were lost before completion in intensely fractured and oxidized rock and gouge material. Rusty oxidation and broken ground persisted to the bottom of all three holes. A sample (166215) of massive galena from the A-Zone assayed 0.48 gram per tonne gold and greater than 30 grams per tonne silver, 1.00 per cent lead and 1.00 per cent zinc, respectively (Brown, J. (2009-01-28): Technical Report on the 2000-2008 Exploration Programs on the Golden Cariboo Project).
In 2005, a sample (E37713) of quartz vein with 10 per cent galena from a former cat trench assayed 1.52 grams per tonne gold, 55.8 grams per tonne silver and 2.98 per cent lead (Brown, J. (2009-01-28): Technical Report on the 2000-2008 Exploration Programs on the Golden Cariboo Project).
