The Sylvia occurrence is situated approximately 8.5 kilometres northeast of Twinkle Lake, 19 kilometres north of Huckleberry mine (MINFILE 093E 037) and 70 kilometres southwest of Houston.

Regionally, the property is underlain by Hazelton Group epidote-rich tuffs and andesitic to basaltic fragmental volcanics within the Tahtsa porphyry district.

The mineralization has been essentially identified by a single 1974 drillhole (S-8). The drillhole is at the inside edge of a crescent-shaped pyritic zone that has a maximum width of 400 to 500 metres and an arc length of approximately 2000 metres. This zone, which contains 1 to 10 per cent pyrite as fracture fillings and disseminations, straddles the south contact of the granodiorite stock. Volcanics adjacent to the stock are variably hornfelsed and locally cut by numerous fine-grained monzonite/quartz monzonite dikes. Porphyry-style copper-molybdenum mineralization occurs on the south edge of a hornblende-biotite granodiorite ± quartz monzonite stock, within medium-grained granodiorite and fine-grained quartz monzonite and up to 10 per cent secondary felted biotite. Thin sections of this material show feldspars partly altered to clay and sericite. In outcrop, approximately 1.2 kilometres east of the original drillhole, chalcopyrite occurs as disseminations and fracture fillings within an epidote-rich tuff adjacent to a grey, feldspar porphyry dike.

In July 1974, Hudson Bay Oil and Gas Company Ltd. drilled five percussion drill holes totalling 247 metres. Later in September and October, the company drilled an additional five percussion drill holes. From these, drillhole S-8 reported the only significant values. Across the entire 63-metre bedrock intercept, the drillhole averaged 0.33 per cent copper and 0.02 per cent molybdenum, including higher grade intercepts of up to 0.635 per cent copper and 0.132 per cent molybdenum (Assessment Report 05213, 33972).

In July to September 1975, Hudson Bay Oil and Gas conducted a ground magnetometer survey showing several anomalies with no discernible pattern (Assessment Report 05671). In September of the same year, the company drilled an additional six percussion drill holes totalling 345 metres although failed to find additional mineralization. Several holes failed to reach bedrock through overburden (Assessment Report 05670).

In August 1976, Hudson Bay Oil and Gas conducted induced polarization and magnetometer surveys, finding two chargeability anomalies, one of which was unknown, and suggesting a target for further exploration approximately 400 by 200 metres in size (Assessment Report 06078).

In 1976, Rio Tinto Canadian Exploration Ltd. carried out an induced polarization and magnetic survey to explore the mineralized results from Hudson Bay Oil and Gas drilling. The survey confirmed a broad and strong chargeability anomaly extending east from the drill-tested area (Assessment Report 33972).

In 1991, Kingsvale Resources Limited optioned the then Sibola-conducted geological mapping and geochemical sampling. Kingsvale dropped their option in 1993 (Assessment Report 24260).

In November to December 1995, Westley Technologies Limited drilled four diamond drill holes totalling 608 metres to test previous results. Drilling failed to reproduce the high grades of 1974 Hudson Bay drillhole S-8, instead encountering low-grade mineralization including 65 metres grading 0.19 per cent copper, 0.004 per cent molybdenum and 1.8 parts per million silver in hole 1 (Assessment Report 24260).

Results from Geoscience BC Quest West gravity and magnetic surveys have identified geophysical anomalies similar to those of the nearby Berg (MINFILE 093E 046) and Bergette (MINFILE 093E 052) deposits (Assessment Report 33972).

In 2012, KDG Explorations Services conducted limited prospecting on the property (Assessment Report 33972).