Contact between Great Dyke and country rock granites, striking 022 and dipping 60 degrees East. Mafic intrusion along the contact in places.
The outcrop is part of the Chinamora Porphyritic Granite which Baldock (1991) assigned to the Chinamora Igneous Complex. This was first described by Snowden (1976) who recognised some 45 different granitic types and Snowden and Bickle (1976) later grouped these into old gneisses, gneissic granites and late granites. The Chinamora Porphyritic Granite is part of the “late granites”.
Following discovery of alluvial gold at Tarka Forest in 2004 and subsequent acquisition of a Special Grant over the area by the Zimbabwe Mining Development Corporation, a lot of interest was roused on the gold potential of the Chimanimani area. This resulted in DTZ-Ozgeo, a company specialised in alluvial minerals, securing a Special Grant (SG 4955) in 2007 to explore for gold in an area encompassing Charleswood Farm adjacent to Tarka Forest, about 15 km east of Chimanimani.
The Umwindsi Shear (Figures 2 and 3) is a major dislocation cutting through the Harare Greenstone Belt and separating the north-trending Passaford Limb from the north-easterly trending Arcturus Limb in the southern part of the Belt. It dies out to the southwest but continues over 90 km to the northeast and north. It is bounded by two zones of intense deformation which are up to 7 km apart and these are more widely spaced where it passes through the Greenstone Belt.
This is a K-feldsparphyric porphyritic granite, cut by aplitic dykes. It has a weak fabric. It has yielded a simple population of zircons which give an age of 2.03 Ga (Master et al., 2013a,b)