Alluvial mining of gold
An overview of an example of a gold mining operation supplied by airplane. See how small gold particles can be recovered.
This operation was supplied by air, so an airstrip, a camp, all mining equipments, etc.. had to be constructed on site. The forest clearing was done by hand.
The operation produced over 70,000 ozs. ( 2,177 kg.) in three years.
Average overall gold grade was: 0.456 g/m3.
Reserves, estimated by exploration, were 5% less than the actual production.
Gold particles size distribution in this gold placer deposit:
After changing last 5 rows for carpets covered by especially designed frames, out of 8 rows in total, the average gold recovery was increased by 62%.
Rafal Swiecki, geological engineer email contact
This document is in the public domain.