The study investigates small-scale Rb-Sr isotope characteristics of banded metasediments from the Late- proterozoic/Early Palaeozoic Kuiseb Formation (Damara Sequence) of the Khomas Trough, Damara Orogen, central Namibia. The Kuiseb Formation, exposed in the western Khomas Trough, comprises a several-thousand-metres-thick sequence of predominantly pelitic and psammitic metasediments with subordinate calc-silicate rocks, graphite schists, scapolite schists and amphibolites (Matchless Member) which were metamorphosed under amphibolite facies conditions. Primary sedimentary
structures, turbidite facies and facies associations, the cyclicity of the sequence and the great lateral extent of sedimentary units suggests that the sedimentary protoliths were deposited on an elongate submarine fan system. The structural overprint is characterised by four phases of ductile deformation, three of which are coaxial with folds verging consistently to the southeast. The overall structural pattern shows that deformation within the Khomas Trough is characterised by contemporaneous folding and thrusting which led to the development of extensive, northward-steepening slices within an overall imbricate fan geometry, with probably repeated sedimentary sequences.