Re Historical mines..
We all know that shallow alluvial mines ( ie Open Pit ) have their source rock lodes in the basement . These lodes are much higher grade and can extend to more than 2km deep , with gold grades increasing with depth.
Basement lodes are primary ( sulphide ) which is mined as hard rock gold as opposed to free digging of the shallow oxide gold.
What is very interesting is that all eight historical alluvial mines in the Imva Fold have Primary mines which have been either very lightly exploited or not exploited at all.
It is evident that mostly alluvial deposits were exploited, due to the ease of mining and extraction and due to the fact that it was mostly mined on a small scale.
Makapeka and Mongailena are among these and we already know the grades of the basement lode of Makapela...over 7 gms per ton just at shallow depths.
Adumbi is a good example of just how little historical mining exploited these dozen or so good deposits.....we are already above 5 m ounces..
Using Makapela...only one drilled in Imva Fold....and Adumbi as examples, it's quite likely that the Imva Fold has multiple Adumbis yet to be drilled