The Great dyke ; some of the oldest metal bearing rocks14 Feb 2020 16:27
What an amazing resource . Check the link for an aerial view of the dyke .
The Great Dyke is up to 8 miles wide and about 330 miles long
The Great Dyke of Zimbabwe is a layered mafic intrusion of igneous, metal-bearing rock that has been dated to approximately 2.5 billion years old. The dyke intrudes through the even older rocks of African craton, the core of oldest rocks forming the continent of Africa.
Zimbabwe's mineral resources include, amongst others, coal, chromium ore, nickel, copper, iron ore, vanadium, tin, platinum group metals (such as palladium) and diamonds. Globally it is a significant producer of lithium, chrysotile asbestos and vermiculite
https://earthobservatory.nasa.gov/images/46341/great-dyke-of-zimbabwe