A Second Look at Canada's Yukon: Great Potential for Small-Scale Miners (Part 4)
(Placer operation near Mayo Lake.)
I now continue this series of posts by discussing glaciated placer gold deposits in the Yukon Territory of Canada:
Glaciated placer gold in the Mayo Area is typically found on the edges or margins of Reid and McConnell period glacial deposits, but in the Dublin Gulch and Haggart Creek locales the gold placers actually lie within the limits of both types of glaciated deposits. This mixing of glaciated gold gravels often produces richer gold ground especially in valley bottoms, gulches, and any alluvial sediments that cut through Reid and McConnell period glacials.
Tributary streams near Mayo Lake carry glaciated placer gold that rests close to McConnell period gold-bearing glacial gravels. Additionally, some Mayo Area placer deposits can be found at the apex of alluvial fans that encroach into the Lake itself. These latter are often hard to distinguish from the ground level, but can be seen quite easily from the air or via satellite imagery.
Most of the placer gold in the Clear Creek area is of the pre-Reid glacial period variety. These glacial drift gravels are often close to the surface and can prove very productive. In other instances, however, the gold-bearing gravels in and around Clear Creek have been buried under substantial overburden.
The Kluane Area has been the recipient of multiple glacial advances and retreats over time, with the oldest glacial movements being the most extensive. However, each time glaciers advanced and retreated here they re-deposited gold and,at the same time, “re-arranged” that very same gold.
( Beautiful array of Yukon Territory placer nuggets.)
Small-scale miners and gold prospectors in the area should keep an eye out for the remnants or vestiges of old streambeds or channels that were left “high and dry” by successive glacial movements. Current streams that carry gold here include Burwash Creek, Gladstone Creek, parts of the Slims River, and the Kaskawush River.
Mount Freegold and Mount Nansen
These glaciated gold placers are pre-Reids that are within the Dawson Range. Some of the best gold values recovered in this area were taken from bedrock (no surprise here) or from layers of “false” bedrock formed from very densely packed glacial till created by successive glacial movements.
That’s it for now. Good luck out there!
If you liked this post, you may want to read: “StateGeological Survey Links (List 1)”
© Jim Rocha (J.R.) 2011
Questions? E-mail me at firstname.lastname@example.org