Cape Town, Western Cape, South Africa
22-23 June 2017
Led by De Ville Wickens (Geo-Routes Petroleum, Cape Town) and Doug Cole (Council for Geoscience, Bellville)
Participants of this field excursion will be introduced to the stratigraphy of the southwestern Karoo Basin by visiting the prime outcrop areas of the Dwyka and Ecca Groups in the Laingsburg and Tanqua Karoo regions. The southwestern Karoo Basin hosts a considerable amount of information on glaciogenic, deep-water and deltaic sedimentation with present day erosion allowing 3D-viewing of laterally continuous (tens of kilometres) outcrops. The Ecca Group in these areas, for example, hosts the world's best examples of deep-water basin floor to slope fan complexes, making it the most sought after “open air laboratory” for studying fine-grained deep-water sedimentation.
The objective of this field trip is to gain a better understanding of the tectono-sedimentary history and stratigraphic evolution of southwestern part of the Karoo Basin, basic depositional processes, facies development, controls on sedimentation patterns and post-depositional diagenetic and structural changes. It further aims to integrate different scales of observation and interpretation, namely the basin (exploration) and the development and production scale (facies distribution and bed-scale stratigraphy). This two-day field trip will focus on show-casing the glaciogenic Dwyka Group, and the Prince Albert and Whitehill Formations of the Ecca Group, which are main targets for shale gas development in South Africa.