Preliminary report on the stratigraphy of the Damara sequence and the geology and geochemistry of Damaran granites in an area between Walvis Bay and Karibib
The rocks investigated in the present study occur within the Central Zone of the Damara Orogen in the area between Walvis Bay and Karibib. This country is underlain by the Abbabis Metamorphic Complex and the Damara Sequence. The former comprises a reddish augengneiss, metabasalt, calc-silicate rocks, quartzite and schist, whereas the latter is represented by metamorphosed sedimentary rocks of the Nosib and Swakop Groups. In this area, both groups have a conformable relationship. The successions have been repeatedly deformed and display a variety of fabrics. The F1 phase is documented by a schistosity that was overgrown by cordierite. It was co-axially deformed during F2 resulting in the principal regional schistosity s2 . During F3 , pre-existing structures were deformed, but only locally a new fabric was created. The major megascopic structures are NEtrending folds. At a few places, the effects of thrusting are apparent.
Communications of the Geological Survey of South West Africa/Namibia
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Preliminary report on the stratigraphy of the Damara sequence.pdf | 1.54 MB |