The Tardis area is astride the King Salmon thrust fault which strikes west-northwest and dips approximately 45 degrees to the northeast. Upper Triassic Sinwa Formation limestone is interpreted to have been thrust from the northeast over the Lower Jurassic Laberge Group, Takwahoni Formation. Structurally conformable on the Sinwa Formation is the Jurassic Inklin Formation sedimentary rocks.
The Jurassic sedimentary rocks both above and below the thrust fault have a prominent northwest strike. A younger, post-Jurassic system of north to northeast fractures and small faults disrupts all units. Silicification, clay alteration, carbonitization, and fluoritization are locally concentrated along the King Salmon thrust fault at intersections with the north to northeast structures.
The Sinwa Formation lies immediately above the King Salmon thrust fault. The Sinwa limestone is divided into two mappable units. The lower unit is variably silicified and brecciated and contains fluorite veinlets associated with zones of intense alteration. Colourless, honey, purple, and blue varieties of fluorite are present. The upper unit is calcareous and contains an abundant white fibrous mineral of unknown identity as well as numerous sinkholes.
Alteration is restricted mainly to the lower Sinwa limestone unit. Silicification is the most common, with carbonitization and fluoritization less common. A sample collected in 1982 from fluorite veinlets within the limestone assayed greater than 1.0 per cent fluorine (Assessment Report 10616). Some anomalous antimony and mercury values are associated with the fluorite mineralization. The only sulphide present on the property was minor disseminated pyrite.
High soil sample values in arsenic, antimony, mercury and flourine coincided with altered lower Sinwa limestone along the King Salmon Thrust Fault. No sulphides were visible in hand specimen to provide a source for the arsenic, antimony, mercury.
WORK HISTORY
In 1981, the area was staked as the Tardis claims by Chevron Canada Resources Limited and 33 soil and 17 rock samples were collected. In 1982, 39 rock samples were collected on a north-south grid and 277 soil samples were collected on a 100-metre grid.
The ground was restaked in 1987 as the Vardis 1-4 claims on behalf of Tahltan Holdings Ltd. Geological mapping was carried out over the centre portion of the property at a scale of 1:10,000. Rock chip sampling of quartz, barite, fluorite, and calcite veins and stockwork and of hydrothermal alteration zones and all sulphide bearing rocks was carried out over the areas mapped. A total of 30 rock samples were sent for analysis. An extensive alteration zone has been identified along the King Salmon Thrust Fault on the Vardis property. The alteration comprises silicification, fluoritization, carbonatization and barite. Highly anomalous arsenic, antimony, mercury, and barium levels occur in both rock and soil samples collected from this zone. Previous work by Chevron delineated gold values of up to 1060 parts per billion in soils over this zone (Assessment Report 17908). An epithermal signature is suggested.
During 2016 through 2020, Brixton Metals Corporation expanded their Thorn property through staking and acquisition of claims including those covering all the Griz (104K 073), Tardis (104K 112), Griz 3 (104K 114) and Emu (104K 115) showings. Refer to Thorn (104K 031), Chivas (104K 180), East Outlaw (104K 083), Oban (104K 168), Trapper (Inlaw) (104K 078) and Metla (104K 161) for details of the work history of the greater Thorn property.
As of early 2021, no work had been done on the Griz (104K 073), Griz 3 (104K 114) and Emu (104K 115) since 1991 and the Tardis (104K 112) since 1987.
