Antler’s Erongo Gold Project is located in central Namibia, about 130 km northwest of Namibia’s capital city Windhoek, near the towns of Usakos, Karibib and Omaruru. The project covers areas of the Navachab-Damara Belt, which is prospective for gold, and overlies similar lithologies and structures to the known Namibian Gold mines (QKR’s Navachab and B2 Golds’ Otjikoto) as well as the recent Twin Hills discovery.
Preliminary work by Antler focused on re-interpretation of the government aeromagnetic data, which lead to the discovery of a large, previously unmapped, deep regional structure – now named the Kranzberg Fault Zone. The Kranzberg Fault stretches southwest to northeast across Antler’s Central Project and can be traced over 50km under several historically mapped gold anomalies (see Press Release dated May 14, 2020).
The Erongo Gold Project benefits from Namibia’s well-established infrastructure of paved highways, railway, power and water. Namibia is mining-friendly and generally regarded as one of the continent’s most politically and socially stable jurisdictions.
Geology of the Erongo Gold Project
The Erongo Gold Project is hosted by rocks within the Southern Central Zone of the Damara Orogen. This terrane comprises mid Proterozoic granitic basement inliers, overlain by metamorphosed late Proterozoic arkoses, shelf carbonates, turbidites and minor volcanic rocks that have been intruded by numerous granites and pegmatites.
The bulk of the Project area is underlain by meta‐sedimentary rocks of the Nosib Group meta‐arkoses (Etusis Formation) or the stratigraphically younger Swakop Group marine carbonates and meta‐turbidites comprising the Arandis Formation (biotite schist, minor quartz schist calc‐silicate rock and amphibolite), the Karibib Formation (dominantly dolomitic and calcitic marbles with minor calc‐silicate) and the overlying Kuiseb Formation (schistose quartz feldspar mica meta‐greywacke and meta‐pelite). Glaciogenic mixtites of the Chuos and Ghaub Formations have limited exposure in the project area. The Swakop Group sediments have been intruded by a series of syn‐, late‐syn‐ and post‐tectonic granite and pegmatite bodies.
The Erongo Gold Project is straddled by the magnetically defined regional scale Omaruru and Welwitschia Lineaments in the west and the Abbabis and Erongo Lineaments in the east. These lineaments are interpreted to be important tectono‐stratigraphic boundaries associated with changes in sedimentology, structure and type of granitic intrusion observed in the Damara Orogen and have known association and control with uranium and other forms of mineralization. The structural setting of the Project area is fairly complex with sediments deformed during poly‐phase deformation and metamorphosed to upper greenschist‐amphibolite facies.
The structural geology of the Erongo Gold Project area is dominated by features typical of the Southern Central Zone of the Damara Belt; Abbabis Basement and/or basal Damara meta‐sedimentary rocks in the cores of dome and anticlinal structures and regional synclinal structures with thick packages of Kuiseb Formation schists occupying these synclines. The larger, earlier folds tend to have fold axes with a north‐east, south‐west direction, parallel to the Omaruru Lineament, and these were subsequently deformed into open basin and dome structures or boudinaged in the more competent lithologies. Later cross cutting lineaments parallel to the Welwitschia Lineament are also evident. These NNE trending structures appear to be loci for mineralised fluid movement.
The gold mineralization in the Damara Belt in general, including Otjikoto, Navachab, Ondundu, Onguati and Twin Hills all share various similarities including stratigraphic position and relationship to regional and local structure. A significant relationship is observed between gold and quartz ‐ sulphide veins hosted dominantly in schists and calc‐silicate rocks and to a lesser extent within marbles and dolomitic marbles, as seen at Navachab (and associated satellite deposits).
For information on previous work, results to date and future plans, please refer to Antler’s recent Management, Discussion and Analysis (MD&A’s) and Press Releases.