The Silica Ridge North occurrence is 23.8 kilometres southeast of the town of Dease Lake, B.C. (bearing 123.5) and 14 kilometres due east of Highway 37. The location is defined by the drillhole collar of DDH TZ15-01, which explores the north side of a prominent lithocap/gossan known as Silica Ridge.

Work history in the In the overall area, referred to as the Tanzilla property:

In 1971 Nittetsu Minerals conducted copper soil, rock and silt sampling (Assessment Report 3538).

In 1973 Kennco conducted airphoto interpretation and 375 kilometres of airborne magnetometer surveys (Assessment Report 4659).

In 1975 Utah Mines conducted an induced polarization survey (Assessment Report 5769)

In 1989 Equity Silver Mines conducted multi-element rock and soil sampling and 24.1 kilometres of VLF-EM and Magnetometer surveys (Assessment Report 9269)

In 1992 Akiko-Lori conducted multi-element rock sampling (Assessment Report 22458)

In 2004 Hyder Gold conducted multi-element rock and silt sampling (Assessment Report 27435)

In from 2006 to 2008 Western Keltic conducted multi-element rock and silt (Assessment Reports 28433, 29198, 30032)

In 2012 West Cirque conducted 21.8 kilometres of Induced polarization surveys (Assessment Report 32724)

In 2013 Terraspec and West Cirque conducted Induced polarization surveys and structural mapping (Assessment Report 34550)

In 2014 West Cirque drilled 5 diamond drill (Assessment Report 35471)

In 2015 Kaizen Discovery drilled 3 diamond drill holes (Assessment Report 36431).

Silica Ridge is part of a seven-kilometre long hydrothermal alteration zone in Lower Jurassic Hazelton Group volcanic rocks, interpreted as related to one or more buried porphyry centres. The alteration zone encompasses a one by three kilometre chargeability high that is open to the east, and is cored by a prominent advanced argillic to phyllic lithocap (Silica Ridge). The lithocap is typical of the style of alteration commonly seen in the upper levels of calc-alkalic porphyry systems.

The most significant results are from hole TZ15-01, which was collared on the north side of Silica Ridge and intersected lithocap-style advanced argillic to phyllic alteration from surface to 288 metres. Below the lithocap, a multiphase suite of high-level diorite porphyries and hydrothermal breccias was intersected to the end of the hole at 840 metres. Alteration in the porphyries and breccias ranges from upper chlorite/sericite-pyrite to lower albite, K-feldspar, magnetite and biotite (sodic and potassic alteration). Quartz, sulfide, chlorite and anhydrite/gypsum veining is widespread in the porphyry, forming dense stockworks from 403 to 423 metres.