The Siwash East occurrence is located to the east of Siwash Creek, approximately 1.5 kilometres north of Siwash Lake.

The area is underlain by Upper Triassic volcanics and sediments of the Nicola Group and by Middle Jurassic granites and granodiorites of the Osprey Lake Batholith. The contact between these units trends northeast across the property. Neogene age feldspar porphyry stocks and dikes of the Otter Intrusions occur throughout the property.

Locally, as exposed by trenching, strongly argillic- to phyllic-altered granitic rocks host narrow quartz veins adjacent to an east-west–trending, steeply dipping andesite dike. The veins are discontinuous and have not been identified on the north side the dike that splits and varies in width from 1 to 3 metres.

In 2001, a 0.5- by 0.5-metre panel sample assayed up to 21.7 grams per tonne gold (Assessment Report 27150).

In 2004, grab samples of the vein material taken at surface assayed averaged analyses of 31.6 grams per tonne gold and 104.4 grams per tonne silver (News Release, Almaden Minerals Limited, March 4, 2005; Assessment Report 34593).

In 2006, diamond drilling intercepted weakly mineralized veins associated with a steeply south-dipping andesite dike yielding up to 1.43 grams per tonne gold over 0.40 metre in hole SED06446 and 3.51 grams per tonne gold over 0.30 metre in hole SED06447 (Assessment Report 29009).

Work History

The area has been historically explored in conjunction with the nearby Elk (MINFILE 092HNE096) occurrence and a complete exploration history of the area can be found there. During 1991 through 2001, Fairfield Minerals completed programs of prospecting, geological mapping, geochemical sampling and six trenches, totalling 202 metres, on the area. The occurrence was discovered by trenching in 2001.

During 2002 through 2012, Almaden Minerals completed programs of geological mapping, geochemical sampling, ground geophysical surveys and four diamond drill holes on the occurrence.

In 2019, a 1108-line-kilometre airborne magnetometer survey was completed on the Elk Gold property. In late 2020 and early 2021, Gold Mountain Mining Corp. completed 42 diamond drill holes on the Elk Gold property. This work centred on the 2500 zone and adjacent veins of the Siwash North (MINFILE 092HNE096) deposit.