The Rehoboth Basement Inlier in the Southern Margin Zone of the Damara Orogen in Namibia comprises two main groups of volcanic and intrusive units: the ca. 1200 Ma Sinclair Sequence and the ca. 1800 Ma Rehoboth Sequence. Till recently, the evolution of the Rehoboth Sequence remained largely unknown. We present results of geochemical investigations carried out on the ca. 1765 Ma Weener Igneous Complex which represents a prominent igneous center in the Rehoboth Sequence. The WIC is a calc-alkaline gabbroic to granodioritic suite. Petrographic features from the other units of the Rehoboth Sequence and the so-called pre-Rehoboth basement are reviewed and support the emplacement of the older part of the Rehoboth Basement Inlier within an arc setting.