The Doorn occurrence is located at 915 metres elevation along Logan Creek, 3.5 kilometres south-southwest of Beaverdell on the west side of West Kettle River. The occurrence is currently held by Apollo Development Inc. as the Y claim group.
There are old workings at and surrounding the Doorn occurrence including eight small adits with winzes, opencuts and trenches. These workings were driven prior to 1960 at four locations to crosscut and drift along shear-hosted quartz veins. Exact locations for the adits and trenches can be found using Assessment Report 9557, Figure 2.
These workings are likely the Midnight Group, which is described in Minister of Mines Annual Report 1938, page 36. At this time, a 37-metre adit was driven and W.T. Hayes shipped 2 tonnes of ore, yielding 62 grams of gold, 871 grams of silver and 67 kilograms of lead.
In 1975, a localized magnetic geophysical and geological mapping exploration program was conducted by Argentia Mines Ltd. over the trenched area on the Doorn claims on the north side of Logan Creek. From 1980 to 1981, Mahogany Mining Company Ltd. completed exploration on the ground covering the Doorn occurrence, held as the Dell claims, and then as the Wye claims. Exploration by Mahogany revealed several geochemical soil and geophysical electromagnetic anomalies on the north and south sides of Logan Creek. Geochemical soil anomalies were erratic with highs of 41,000 ppm lead, 2290 ppm zinc, 5.8 ppm silver and 127 ppm copper (Assessment Report 20849). In 1997, St. Elias Mines Ltd. held the area as the Dad E claim and conducted sampling of T1 Trench and Cabin Adits (George Cross Newsletter #152 (Aug.8), 1997). During 2007 through 2009, Intigold Gold Mines Ltd. completed programs of rock and soil sampling and am airborne geophysical survey on the area as the Beaverdell property.
The Doorn occurrence is underlain by granodiorite, quartz diorite, diorite, quartz monzonite and monzonite of the Middle Jurassic Nelson intrusions and Cretaceous to Tertiary Okanagan batholith. Three kilometres to the north these rocks are intruded by a one to two kilometre diameter stock of Eocene Coryell monzonite. Approximately 5 kilometres to the east is a small pendant of Carboniferous to Permian metasedimentary and metavolcanic rocks of the Anarchist Group. Five fault orientations have been found to the east on Wallace Mountain; of which two are important with respect to mineralization. High angle, north striking, normal faults, dipping steeply to the east, divide Wallace Mountain into several large blocks which displace veins. Southwest striking normal faults dip moderately steeply to the northwest have displacements of a few centimetres to several metres. Fault spacing is locally on a metre scale, dividing veins into numerous short sections.
In the west-central and south part of the claim area granodiorite and quartz diorite of the Nelson intrusions have been intruded by quartz monzonite and monzonite of the Okanagan batholith. On the western and southern boundaries of the claims, fine grained, Eocene diorite and aplite dikes intrude the granodioritic country rocks.
Mineralization on the claim is confined to fractures and quartz veins within chloritic and argillic altered shear zones hosted by granodiorite and quartz diorite. Irregular andesite dikes occur within these shear zones. Magnetic highs are related to these andesite dikes. North of Logan Creek trenching has exposed two vein systems. The first trench (T1) exposed up to 3 quartz veins 5 to 90 centimetres wide striking 120 degrees and dipping 60 to 70 degrees south. Minerals within the veins include free gold, galena, chalcopyrite, bornite, sphalerite and bismuth telluride. Malachite staining is frequent within the fracture zone for over 1.2 metres. Several samples from this trench have yielded anomalous gold, silver and copper. The best results were from samples taken in 1975 which yielded 199.88 grams per tonne gold, 997.71 grams per tonne silver and 1.57 per cent copper over 30 centimetres (Assessment Report 5441). The average of 7 chip samples from this trench over an average width of 40 centimetres was 57.99 grams per tonne gold, 329.93 grams per tonne silver and 0.65 per cent copper (Assessment Report 5441).
A second area of trenching 61 to 91 metres west of the main trench has exposed a mineralized shear approximately 1.0 metre wide striking 060 degrees and dipping 70 degrees northwest in weakly altered granodiorite. A composite sample has returned values of 8.9 grams per tonne gold, 70 grams per tonne silver, and 0.87 per cent copper (Assessment Report 5441). A 3-metre continuous chip sample yielded 1.47 grams per tonne gold, 1.71 grams per tonne silver and 0.96 per cent copper (Assessment Report 5441).
On the north side of Logan Creek, mineralized zones in these two trenches, occupies east trending fractures.
The following descriptions occupy northeast fractures with no visible sulphide mineralization or significant gold values (Assessment Report 9557). About 500 metres to the south, two short adits expose a narrow rusty shear zone with quartz veinlets and massive sulphides. The zone is weakly argillic altered. A sample from a 20-centimetre quartz vein yielded 0.91 gram per tonne gold (Assessment Report 20849). There are several northwest trending quartz veins exposed in trenches to the west of these adits.
Another kilometre south, a 150-metre long crosscut exposes over 18 fault-shear zones with associated quartz veins up to 0.3 metre wide. Samples yielded low gold however (Assessment Report 20849). Several winzes in the vicinity intersected highly oxidized structures with quartz veinlets but negligible gold (Assessment Report 20849). A sample from one of these winze collars in 1980 yielded 153.28 grams per tonne silver, 2.48 per cent lead and 5.80 per cent zinc (Assessment Report 8504). Another grab from the winze dump yielded 164.57 grams per tonne silver, 0.51 gram per tonne gold, 3.4 per cent lead and 0.96 per cent copper (Assessment Report 8504).
