Yukon Geological Survey publication metadata (English, HTML)

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Publisher-reported update

2026-08-26

The Harlan property is a significant new sediment-hosted gold prospect within the Selwyn Basin of east-central Yukon Territory. The property has a large, kilometre-scale surface gold-arsenic-antimony-mercury-bismuth anomaly within a thick sequence of Paleozoic Selwyn Basin shelf and off-shelf sedimentary rocks. A series of mid-Cretaceous, late-stage, Tombstone Suite, quartz-feldspar-porphyritic monzonite dykes and small plugs intrude these rocks. Two major mineralized zones have been defined: 1) the Vortex Zone, a thick package of strongly brecciated, silicified, and argillic-altered coarse clastic sedimentary rocks overlain by a thrust-faulted argillite member; and 2) the West Porphyry Zone, consisting of abundant mineralized and altered monzonitic dykes. Surface sampling over the Vortex Zone has defined a north-northwest-trending 1600 m by 700 m zone averaging over 500 ppb gold in soils, with rock sample values up to 6.5 g/t Au. Within this zone, an intensely brecciated area measuring 500 m x 300 m averages greater than 1 g/t Au in soils. A broad anomalous area was identified from surface sampling across the West Porphyry Zone, revealing gold-in-silt values up to 230 ppb and…

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