The area is largely underlain by basalt and basalt breccias of the Upper Triassic Karmutsen Formation (Vancouver Group) intruded by rocks of the Jurassic Island Plutonic Suite and Tertiary(?) porphyry dikes and sills. Strong faults affect the property area. Quartz-carbonate veins associated with dacite porphyry dikes near quartz diorite, are mineralized with gold-bearing pyrite, minor arsenopyrite and traces of chalcopyrite, pyrrhotite and sphalerite.
The Tay occurrence area comprises pillowed, brecciated and massive basalt flows. These rocks are commonly amygdaloidal and finely porphyritic. Locally they are characterized by myriad hairline to centimetre sized fractures that are filled variously by combinations of quartz, feldspar, carbonate and epidote. Where hornfelsed or otherwise close to quartz diorite intrusions, the basalt commonly contains irregular amounts of pyrite as fine disseminations, blebs, small aggregates, joint coatings and minute veinlets. Pyrrhotite occurs as very sporadic streaks 2 to 4 millimetres in width and as rare disseminations. The pillow selvages in the basalt flows have been variously filled with quartz, calcite, epidote and pink orthoclase and are usually mineralized with pyrite and rarely chalcopyrite and pyrrhotite. The Karmutsen Formation basalt is intruded by the faulted, southeastern portion of the Bedwell batholith, part of the Island Plutonic Suite. The rock is predominantly granodiorite and locally quartz diorite. Some porphyry and gabbroic gradations occur. Quartz diorite occurs as a complex, heterogeneous dike connecting with the granodiorite. The pillow basalt adjacent to the dike and extending east from it, contains a myriad complex of dikes and sills of dacite porphyry, quartz diorite and diorite porphyry. The main exposure of the quartz diorite dike-like mass is 75 to 150 metres wide and exposed along strike for 700 metres. The south contact is sharp and linear whereas the north contact consists of a complex xenolithic zone with myriad dikes and sills. In places swarms of quartzofeldspathic veinlets cross the main dike perpendicularly. The southeast tip of the mass appears to be offset right-laterally about 110 metres by a northeast trending fault (Wolfram fault). Numerous small, irregular dikes or sills of Tertiary(?) dacite porphyry occur in the immediate area extending east from the east end of the main quartz diorite mass.
Strong east and southeast trending fault lineaments are evident in the area with smaller north trending lineaments. Several relatively small faults occur in the occurrence area. One of these is the Wolfram fault that offsets quartz diorite right-laterally; a vertical displacement with unknown relative displacement is indicated. Graphitic faults trending south-southeast have been encountered. Many small north trending faults are exposed and have associated crushed zones. Flat faults also occur.
The Main Showing (Tay vein) is the most important known mineralization on the Tay property and comprises quartz-carbonate fissure veins located at the extreme southeast end of the Bedwell batholith, in the axial part of its roof facies. The roof facies consists of a thick succession of pillow basalt, variably faulted and hornfelsed, which contains innumerable small dikes and sills of dacite porphyry, xenolithic quartz diorite, diorite porphyry and porphyritic dacite. The veins are associated with the dacite porphyry dikes and appear to be cut and locally terminated by quartz diorite porphyry. Bulldozer trenches have exposed a fault striking 086 degrees and dipping 75 degrees north containing quartz-carbonate veining in the footwall; this forms part of the Tay vein system. The sulphide mineralization is mainly pyrite with traces of arsenopyrite and chalcopyrite. Most of the sulphides are disseminated, but sulphide-rich patches, veinlets and stringers occur with concentrations in quartz-rich parts of the vein.
Diamond drilling in 1987 delineated the vein for 165 metres along strike, showing widths ranging from 2 to 4 metres. A minus 30 degree rake to the west was indicated with depths of 90 metres below the surface at the west end and 40 metres below the surface at the east end. The strike projection of the vein is shown to be cut off to the west where it enters quartz diorite. Drilling in 1988 was concentrated at the eastern end of mineralization and defined a large unmineralized area in the middle of the vein; thus, the mineralized part of the vein forms a semi-circular halo-shaped zone around a central unmineralized area. Current data suggests indicated reserves of 132,255 tonnes grading 2.15 grams per tonne gold and 0.68 gram per tonne silver. Calculated average thickness of the mineralization is 2.84 metres with a cutoff of 0.68 gram per tonne gold and 1.5 metres true width (Assessment Report 18395).
A number of other showings occur close to the Tay vein area. Showing No. 2 is 50 metres south of the Tay vein and consists of a flat-lying quartz-carbonate vein in faulted pillow basalt. The vein is up to 0.4 metre thick and a chip sample from it assayed 2.02 grams per tonne gold (Assessment Report 18395). Showing No. 3 is an old hand cut 100 metres south of the Tay vein which exposes a mineralized fissure in pillow basalt about 0.3 metre wide containing quartz-carbonate veining. A grab sample from a few pieces of oxidized sulphide rock assayed 3.73 grams per tonne gold (Assessment Report 18395). Showing No. 6 is 900 metres northwest of the Tay Vein and consists of several diverse trending fractures in faulted basalt. One of the fractures exposed across a width of 0.2 metre and length of 1 metre consists of rusty sheared rock. A chip sample assayed 3.49 grams per tonne gold (Assessment Report 18395).
In 1994, Dalmation Resources Inc. completed a program of 15 diamond drill holes, totalling 1703.6 metres, on the Tay zone. The best intercept of the program returned 7.2 grams per tonne gold over 1.2 metres (Assessment Report 23808). In 1997 through 1999, Dalmation Resources continued sampling and drilling programs on the Tay and associated occurrences; including the Apex (MINFILE 092F 150) and Morning (MINFILE 092F 119) showings. In 2005, the area was explored as the Tay-Christina property of Perovic Enterprises Inc. with minor drilling occurring on the nearby Nora occurrence, 1.4 kilometres to the west.