The Old Corona No. 1 occurrence is located in the northwest corner of the Old Corona No. 1 (L.4512) Crown grant at an elevation of approximately 1600 metres and approximately 1.7 kilometres southeast of Revelle Lake.
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, both of 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.
The occurrence lies within folded, fine- to medium-grained interbedded basalt flows, tuffs and agglomerates of the Upper Triassic Nicola Group. A 25- to 70-metre wide and 600-metre long zone of limonitic, ankeritic volcanics occurs in a distinct depression between prominent north-northwest–trending ridges of unaltered volcanics. The altered mafic volcanic rocks host quartz carbonate veins, 5- to 10-centimetres wide, wide pyrite, galena, sphalerite and tetrahedrite mineralization. The veins strike north-northeast and south-southwest with dips of 85 degrees to the west.
In the collapsed Corona shaft and in several trenches, quartz carbonate veins are 5 to 10 centimetres wide with a northwest strike and steep westward dip. Mineralization includes galena, sphalerite, pyrite and tetrahedrite.
In 1986, a grab sample (4702) from the Corona shaft assayed 2442.1 grams per tonne silver and 0.1 grams per tonne gold, whereas a chip sample (4703) from the shaft yielded 461.7 grams per tonne silver over 0.6 metre (Assessment Report 15312).
Another zone of mineralization is reported to be located approximately 360 metres north-northeast of the Corona shaft, on the Corona No. 2 claim, and comprises a historical opencut exposing a carbonate zone in greenstone hosting quartz stringers and veins up to 30 centimetres wide. The veins strike north-south and dip 20 degrees west. Sulphide mineralization includes pyrite, galena, sphalerite and copper carbonates. Other zones of minor mineralization are reported between the previous two zones.
Work History
In the late 1910s, a 19.5-metre long vertical shaft and several trenches and/or opencuts were developed on the occurrence.
In 1972 and 1973, Hesca Development Corp. Ltd. completed a program of rock, silt and soil sampling on the area immediately east of the occurrence as the Kay and Lyn claims of the Swakum Mountain property. In 1979, the area was prospected by L. Trenholme as the Dartt 1-2 claims.
In 1980, S. Kelly completed a soil sampling program on the area as the Old Corona claims. In 1983 and 1984, Pacific Northwest Geotech Ltd. completed soil sampling programs on the area. Also in 1984, a program of geological mapping and a ground magnetic survey was completed on the area immediately south and west of the occurrence as the Tom, Dick and Harry claims and Mag-Ty Resources Ltd. prospected the area. In 1985, Decade International Development Ltd. completed a program of geological mapping, soil sampling and a ground magnetic survey on the Tom and Dick claims. The following year, a ground electromagnetic survey was completed on the claims. In 1986, Atlar Resources Ltd. completed a program of geological mapping, geochemical (rock and soil) sampling and ground magnetic and electromagnetic surveys on the area as the Corona-Bob property.
In 1998, Ahura Mining Ltd. prospected and sampled the area as the How 1-10 and Corona 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.
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.
