by The Conference .
Written in English
|Other titles||Vaal-Orange River System|
|Statement||excursion leaders: M.C.J. de Wit ... [et al. ] ; compiled by M.C.J. de Wit, J.D. Ward and J.R. Jacob j; edited by J. Rogers and E. Cotter ...|
|Contributions||Cotter, E., Jacob, James R. 1940-, Rogers, J., Ward, J. D., Wit, M. C. J. de|
|The Physical Object|
|Pagination||61 p. :|
|Number of Pages||61|
The Orange River (from Afrikaans/Dutch: Oranjerivier) is a river in Southern is the longest river within the borders of Lesotho and the Orange River Basin extends extensively into South Africa, Namibia and Botswana to the north. It rises in the Drakensberg mountains in Lesotho, flowing westwards through South Africa to the Atlantic river forms part of the international Country: Lesotho, South Africa, Namibia. The post-African Vaal–Orange system consequently contained a diamond resource derived from secondary sources associated with the reworking of African-Surface residual lag deposits, and from primary kimberlite and secondary Dwyka diamictite sources related to deflation below the African Surface during the post-African erosion by: deposits. • The world's largest known gem quality alluvial diamond deposits are located along the Namib Desert coastline of southwestern Africa, known as the Sperrgebiet or "forbidden territory," and along the Orange River near Alexander Bay. • Namibia's placer diamond deposits are . Laingsburg Kovacs, Vaal River Alexander, Lower Orange DWA, Orange River Du Plessiset al., Flooding of the Vaal-Orange River System(VORS) is a major concern in South Africa as the system covers nearly half (49%) of the country and supplies water to agricultural, industrial.
De Wit MCJ, Ward JD, Jacob JR () Diamond-bearing deposits of the Vaal-Orange River system. Field excursion guide book, University of Cape Town. Deacon J () Later Stone Age of Southermost Africa. BAR, Oxford (Cambridge Monographs in African Archaeology 12). Where diamond-bearing resistate gravels in-fill makondos, the derived or eluvial deposit will be richer in diamonds than the original alluvial deposit. Palaeotopography All alluvial deposits other than those currently being generated by an active river or transgressive sea are features of palaeotopography. However, these all remain unexplored even though any one could be a significant diamond deposit (see Sutherland and Hausel, ). Figure 2. Prospectors at Centennial Ridge search for gold, but only find diamond indicator minerals in the Middle Fork of the Little Laramie River. So many indicators were found in that it even surprised the. River Diamonds. Game trailer Combine all diamonds in pairs as fast as possible. Click on tile to reveal the hidden diamond. Start Restart Fullscreen Donate River Diamonds. Play. Favorite. Favorite. Click to add this game to your favorites. Share. Rate. Current rating: out of 21 votes.
J.D. Ward's 10 research works with citations and 1, reads, including: The significance of the cretaceous diamondiferous gravel deposit at Mahura Muthla, Northern Cape province, South Africa. The Orange-Vaal River system is known to be the primary secondary source for alluvial diamond deposits in the northern Cape and along the west coast of Namaqualand. The higher order sources for diamonds contained within this system are still not defined entirely to satisfaction, but certainly include kimberlite pipes exposed in the catchment. rivers included the proto-Vaal, -Orange, -Harts, and -Riet Rivers and their modem antecedents. The river deposits, which in part reworked glacial outwash deposits, all appear to have a Diamond bearing deposits found at Holpan and Klipdam include remnants of well developed palaeochannel. Johnson, J. P. and Young, R. B. The relationship of the ancient deposits of the Vaal River to the Palaeolithic period of South Africa. Transactions of the Geological Society of .