The Rumble Creek showing is on a south-facing ridge side above a tributary of Verrett River, approximately 10 kilometres north of Iskut River.
The Rumble Creek showing area is underlain by Upper Triassic sedimentary and volcanic rocks of the Stuhini Group and Devonian to Permian sedimentary and volcanic rock of the Stikine Assemblage. Intrusive rock of the Triassic to Eocene Coast Plutonic Suite intrude the showing area.
Previous work north of Chubby Creek defined gold mineralization occurring near the headwaters of both Rumble and Cripple Creeks. In 1989 mineralized float material was found at the base of Rumble Creek during soil sampling. Prospecting resulted in the location of skarn and vein type mineralization.
A stratabound bed of massive magnetite with minor malachite, one to three metres wide and visible for approximately 50 metres along strike, was discovered at the 1450 metre elevation. This zone occurs at the contact between a limestone and an intermediate volcanic unit. At 1350 metres elevation a 4.0 by 2.5 metre massive pyrite-magnetite pod returned geochemically anomalous gold and copper (Sample 06260). Float samples of skarn material collected in this area assayed to 6.17 grams per tonne gold (Sample 06308) with associated anomalous copper, zinc and silver values (Assessment Report 20666).
At the 1280 metre elevation grab samples from a narrow quartz-sulphide vein assayed 1123.55 grams per tonne silver (Sample 06210) with significant copper, lead and zinc present (Assessment Report 20666). Where observed in outcrop the vein is less than 15 centimetres wide. It occurs in a 0.5 metre wide shear that can be traced on surface for approximately 20 metres. Sulphides within the vein include tetrahedrite, galena and sphalerite.
In 2011 Garibaldi Resources Corp. and Acadia Resources Corp. collected a total of 109 composite soil and talus samples and 27 channel and rock samples downslope of the reported mineralized zones to determine if the mineralized zones have significant size potential. A significant number of anomalous gold and copper values were reported from soils with anomalous gold values ranging from several tens of parts per billion to a high of 0.245 gram per tonne gold and anomalous copper values ranging from 100 parts per million to a high of 635 parts per million (Assessment Report 32926).
In 2016 Garibaldi undertook an exploration program focused on the Chubby Creek Target. A total of 21 rock and soil samples were collected. Terrain within the mineralized area is challenging and many of the gossan zones will require assistance from trained rock climbers to safely complete systematic sampling programs. Results of the 2016 sampling program verified the presence of gold mineralization within pyritic shear zones. Two of the rock samples (Sample GRC-16-09 returned 1.465 grams per tonne gold) and one of the soil samples returned strongly anomalous gold values. This is a chip sample of sheared, fractured, medium-fine grained andesite with intense gossan (hematite-jarosite-pyrite ± limonite) assemblage, moderate chlorite-actinolite (hornfels) alteration and carbonate-actinolite veins (Assessment Report 36517).
See King (104B 338) for a common work history.
