The Old Alameada 4 occurrence is located near the peak of Swakum Mountain.

The area is underlain by undivided volcanic rocks of the Western Volcanic facies of the Upper Triassic Nicola Group and fine clastic sedimentary rocks of the Lower to Middle Jurassic Ashcroft Formation, which have been intruded by Upper Triassic to Lower Jurassic dioritic rocks. See the Old Alameada (MINFILE 092ISE094) occurrence for a regional geology summary of the Swakum Mountain area.

Opencuts on the Alameada No. 4 claim (L.4504) expose numerous stringers and bunches of quartz and calcite hosted in Upper Triassic Nicola Group limestone. The vein zone is 1.8 to 2.4 metres wide and carries sparse chalcopyrite, galena, sphalerite and pyrite. The footwall of the zone strikes approximately 050 and dips 80 degrees southeast.

A lens of limestone at the 1706 metre elevation averages 45 metres wide and is exposed for 402 metres along a line trending 020 degrees. The rock is light-buff to grey with brown grains of dolomite, white calcite stringers and some thin shaly interbeds. A shallow pit exposes sulphide mineralization near the centre of the lens. A sample taken across the width of the limestone 30 metres south of the pit analyzed 0.67 per cent iron (III) oxide, 0.047 per cent manganese (II) oxide, 0.63 per cent magnesium oxide, 48.0 per cent calcium oxide, 0.056 per cent phosphorus pentoxide, 0.02 per cent sulpher, 38.99 per cent Ig. Loss , 0.03 per cent water, 11.16 per cent Insol. and 1.08 per cent R2O3 (Minister of Mines Annual Report 1958).

Work History

In the late 1910s, a series of opencuts were developed on the occurrence.

In 1969, Zulco Explorations Ltd. completed a 2.2 line-kilometre induced polarization survey on the area as the Alameada property.

In 1972, Adar Resources completed a 7.6 line-kilometre ground magnetic survey on the area immediately north and east of the occurrence as the LO claims. The following year, Adar Resources completed a program of diamond drilling, totalling 150 metres, percussion drilling, totalling 144 metres, soil sampling and ground magnetic and electromagnetic surveys on the Amigo, Lo and Old Alameada claims. In 1979, the area immediately south of the occurrence was prospected by L. Trenholme as the Dartt 1-2 claims.

In 1980, G. D’Angelo completed a soil sampling program on the area as the Old Alameda claims. In 1981, Pacific Northwest Geotech Ltd. completed a soil sampling program on the area immediately west of the occurrence as the New Alameda claims. In 1988, International Corona Corp. completed a program of trenching and 11 diamond drill holes, totalling 800.1 metres, on the area immediately north of the occurrence as the Petrie property.

In 1998, Ahura Mining Ltd. prospected and sampled the area immediately south of the occurrence as the How 1-10 claims. The following year, a program of geological mapping, rock sampling and a 27.2 line-kilometre ground electromagnetic survey was completed on the claims. In 2000, Ahura Mining completed a program of geological mapping and geochemical (rock and soil) sampling on the How property.

In 2010 and 2012, Pan Andean Minerals Corp. completed programs of soil sampling on the area immediately east of the occurrence as the Dartt Lake claims.

During 2011 through 2016, Plate Resources Corp. completed programs of geological mapping, geochemical (rock and soil) sampling, airborne and ground geophysical surveys and diamond drilling on the area as apart of the Lucky Mike property.