Title:

Superposed folding at the junction of the inland and coastal belts, Damara Orogen, NW Namibia

Author(s):
Publication Year:
2000
Abstract:

Two adjoining dome structures in Neoproterozoic Otavi Group sediments are located at the intersection of the Outjo (inland branch) and Kaoko (coastal branch) fold and thrust belts of the Damara Orogen on the farm Vrede, northwestern Namibia. Systematic mapping of outcrop-scale cleavage and folding relationships has unraveled three temporally distinct folding events in the two dome structures. In present-day coordinates, the first shortening event (D1 ) produced E-W trending folds. The second contractional phase (D2 ) developed N-S trending folds. The third shortening episode (D3 ) featured a renewed production of E-W trending folds. If this chronology of deformation is applied to similarly oriented structures along the inland and coastal belts, a history of ocean closure and the amalgamation of southwestern Gondwanaland can be inferred. Closure of the Adamastor ocean and collision along the Kaoko margin began before closure of the Khomas sea and collision along the inland belt

Publication Title:

Communications of the Geological Survey of Namibia

Publisher:
Geological Survey of Namibia
Volume:
12
Pages:
99-109
Item Type:
Journal Article
Language:
en
Keywords: