The Corrigan occurrence extends from the lower western slopes of Jackson Creek westerly across the divide between Jackson and McGuigan creeks. The Crown granted portion of the claim group, except for the Morning Star No. 2 claim, lies south and west of the adjoining Jackson Group (082KSW015) and extends into the McGuigan Creek basin. Kaslo, British Columbia lies 28 kilometres to the east-southeast.
While there are no extensive workings at the Corrigan occurrence, 110 tonnes of ore was mined in 1900 on the former Florida claim of the former New Era Group and an additional 23 tonnes of recorded production took place between 1948 and 1970. Workings consisted of a number of short adits, opencuts and shafts exploring vein exposures. Pre-1935, the Craigie claim was known as the Florida claim. The New Era Claim Group was subsequently staked as the Custer-T.P Group and covered the same ground as the Florida, now the Craigie. Most of this later production has also taken place on the former Era Claim Group. In 1951 and 1952 ore was mined from the Winona-Boon lodes. The Winona-Boon lodes and Boon tunnel were reopened in 1966 and a small amount of ore was recovered. Work was done under option by Hilroy Mines Ltd. Work was continued in 1967 with 30 metres of surface stripping and two diamond-drill holes totalling 46 metres completed. Two tonnes of sorted ore from old dumps were shipped to the Trail smelter. A 15.24-metre diamond- drill hole was drilled in 1975 on the Craigie claim, then owned by R. Saalfeld. No significant mineralization was found (Assessment Report 5644).
The Corrigan occurrence is underlain by strata of the Triassic Slocan Group, having a general strike of 330 to 320 degrees, dipping either northeast or southwest. Along the northeastern flank of the Corrigan Claim Group and midway between Jackson Creek and the westerly ridge lie massive quartzite and argillite. Elsewhere, strata are mainly fissile slate interbedded with limestone and quartzite. The area has been intruded by many quartz porphyry dikes, particularly in slates on the Winona and Boon fractions.
Orientation of the vein-lodes of the Corrigan occurrence are irregular. The Jackson lode at the adjacent Jackson occurrence (082KSW015) appears to continue westerly to northwesterly onto the Craigie and Custer claims. Two crosscuts explored the Jackson lode immediately west of the Jackson occurrence. Here, the lode strikes 140 to 145 degrees and dips 60 degrees southwest. Hostrocks are blocky carbonaceous argillite are intruded by several quartz porphyry dikes. A crossfissure, striking 115 degrees and dipping steeply northeast, was discovered in the upper crosscut. Galena was found within this crossfissure.
The lode, exposed in the old New Era shaft on the Custer claim, strikes 250 degrees and dips steeply southeast hosting fine galena. The lode is well defined with altered basic dike in the hangingwall. Two other closely parallel lodes to the southwest near the Winona-Dublin Queen claim boundary, are possibly continuous. Jointly these lodes are referred to as the Winona-Boon lodes. The more southeasterly of these two lodes is also called the Dublin Queen vein of the Jackson occurrence. The other lode, striking 065 degrees and dipping steeply to the southeast, is developed by two adits. The lode contains a vein composed primarily of galena. It varies in thickness from 5 to 25 centimetres and follows jointing in host argillites. Towards the face of the upper adit the vein changes orientation along bedding striking 320 degrees. Calcite, brecciated argillite and pyrite comprise the vein at this location. In 1951, these lodes were developed by opencuts and two adits 18 to 24 metres long. The lodes in both adits are terminated by faults. The adits were connected by a raise near the end of the workings. Ore was mined from a bench off this raise.
The Boon tunnel was driven along a fissure that strikes nearly east within slaty argillites and quartz porphyry dikes and sills. Occasional limestone lenses were observed. A narrow stringer of clean galena was found in this fissure near the portal but farther in sphalerite was the main ore mineral. The high grade of silver reported was attributed to tetrahedrite and pyrargyrite.
While total recorded production from the Corrigan occurrence amounts to 132 tonnes, this record is incomplete. No information is available for tonnage or grade on ore shipments made from the Custer and Craigie claims. Operations on the Winona and Boon fractions in 1902, 1917 and 1918 are reported to have yielded three ore shipments of silver-lead ore (Geological Survey of Canada Memoir 184, page 211). Some 12 tonnes of ore is reported shipped from the workings on the old New Era shaft and the two lodes near the Winona-Dublin Queen boundary between 1916 and 1935 (Geological Survey of Canada Memoir 184, page 212). It was claimed 3.3 tonnes ore was shipped from the Boon vein (Geological Survey of Canada Memoir 184, page 212). Production in 1951 was from the Winona-Boon lodes on the Winona claim. The ore was sent to the Trail smelter in this year and subsequent years (Minister of Mines Annual Reports 1952, page 273; 1966, page 223; 1967, page 254; 1970, page A55). A total of 215,326 grams silver, 44,681 kilograms lead and 3367 kilograms zinc were recovered from the 131 tonnes of recorded production.
