1887
PDF

Abstract

Mining in Monarch area exploited lenticular gold bearing quartz veins up to 400m long and 2m thick. These veins were emplaced along shears within a complex tectonic contact zone between the Francistown Tonalities and the Penhalonga Formation. The shears were localised by inclusions of altered schist within the tonalite. The shears extend some 1500m along a northerly trending strike, dipping steeply to the west. Subsidiary shears trending north-north-east and northwest are also mineralised and the highest grades are found where these intersect with the main zone. The wall-rock hosting the veins also has impregnations of carbonate and sulphide, and typically contains fine-grained biotite (or stilpnomelane) which imparts a brownish hue to the altered zones.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609-pdb.329.69
2012-03-25
2021-12-04
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.329.69
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error