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Journal articles on the topic 'Faults (Geology) – South Africa – Eastern Cape'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Bezuidenhout, L. J., M. Doucouré, V. Wagener, et al. "Rayleigh group velocity extraction from ambient seismic noise to map the south Eastern Cape Karoo region, South Africa." South African Journal of Geology 120, no. 3 (2017): 341–50. http://dx.doi.org/10.25131/gssajg.120.3.341.

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Abstract The Karoo region of South Africa is an ideal laboratory to use ambient seismic signals to map the shallow subsurface, as it is a quiet and pristine environment with a geology that is relatively well known. Ambient seismic signals were continuously recorded for a ten week period between August and October 2015. The ambient seismic noise network consisted of two groups of 17 temporary, stand-alone seismic stations each. These were installed in the southeastern Cape Karoo region, near the town of Jansenville. Here we present data on the retrieval and coherency of Rayleigh surface waves e

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2

Bezuidenhout, L. J., and C. M. Doucouré. "Source azimuth determination of ambient seismic noise in the Eastern Cape Karoo, South Africa." Journal of African Earth Sciences 164 (April 2020): 103639. http://dx.doi.org/10.1016/j.jafrearsci.2019.103639.

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3

Holzforster, F. "Lithology and depositional environments of the Lower Jurassic Clarens Formation in the eastern Cape, South Africa." South African Journal of Geology 110, no. 4 (2007): 543–60. http://dx.doi.org/10.2113/gssajg.110.4.543.

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4

Pillay, T., H. C. Cawthra, A. T. Lombard, and K. Sink. "Benthic habitat mapping from a machine learning perspective on the Cape St Francis inner shelf, Eastern Cape, South Africa." Marine Geology 440 (October 2021): 106595. http://dx.doi.org/10.1016/j.margeo.2021.106595.

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5

Booth, P. W. K., G. Brunsdon, and R. W. Shone. "A Duplex Model for the Eastern Cape Fold Belt? Evidence from the Palaeozoic Witteberg and Bokkeveld Groups (Cape Supergroup), Near Steytlerville, South Africa." Gondwana Research 7, no. 1 (2004): 211–22. http://dx.doi.org/10.1016/s1342-937x(05)70321-x.

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6

Albini, Paola, Fleur O. Strasser, and Nicolette S. Flint. "Earthquakes from 1820 to 1936 in Grahamstown and surroundings (Eastern Cape Province, South Africa)." Bulletin of Earthquake Engineering 12, no. 1 (2014): 45–78. http://dx.doi.org/10.1007/s10518-013-9562-0.

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7

Miller, W., R. Armstrong, and M. J. de Wit. "Geology and U/PB geochronology of the Gamtoos Complex and lower Paleozoic Table Mountain Group, Cape Fold Belt, Eastern Cape, South Africa." South African Journal of Geology 119, no. 1 (2016): 147–70. http://dx.doi.org/10.2113/gssajg.119.1.147.

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8

Lewis, Colin A. "Late Quaternary environmental phases in the Eastern Cape and adjacent Plettenberg Bay-Knysna region and Little Karoo, South Africa." Proceedings of the Geologists' Association 122, no. 1 (2011): 187–200. http://dx.doi.org/10.1016/j.pgeola.2010.06.005.

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9

Bamford, M. K., B. Cairncross, and H. Lombard. "Silicified fossil woods from the Late Permian Middleton Formation, Beaufort Group, Eastern Cape Province, South Africa and their palaeoenvironmental significance." South African Journal of Geology 123, no. 4 (2020): 465–78. http://dx.doi.org/10.25131/sajg.123.0036.

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Abstract Fossil wood is described from the Late Permian Middleton Formation, Adelaide Subgroup, Beaufort Group of the Karoo Supergroup in the Easter Cape Province, South Africa. The wood consists of in situ tree trunks up to 9 m long, partially enclosed in fine-grained sandstone surrounded by argillaceous mudstone and siltstone. The strata are poorly exposed due to the eroded and denuded land surface. All are lying horizontally and none are in upright growth positions. Comparisons of the study site lithologies with known surrounding Middleton Formation lithostratigraphy supports the interpreta

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10

Taylor, Peter John, Teresa Kearney, Desire Lee Dalton, Gamuchirai Chakona, Christopher M. R. Kelly, and Nigel P. Barker. "Biomes, geology and past climate drive speciation of laminate-toothed rats on South African mountains (Murinae: Otomys)." Zoological Journal of the Linnean Society 189, no. 3 (2019): 1046–66. http://dx.doi.org/10.1093/zoolinnean/zlz134.

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Abstract Mitochondrial DNA sequences (1137 bp) of the cytochrome b gene and craniodental and craniometric data were used to investigate the evolutionary relationships of six putative rodent taxa of Otomys (family Muridae: subfamily Murinae: tribe Otomyini) co-occurring in the Western Cape and Eastern Cape provinces of South Africa. Phylogenetic analysis of 20 new sequences together with craniodental and craniometric characters of 94 adult skulls reveal the existence of a unique lineage of Otomys cf. karoensis (named herein Otomys willani sp. nov.) from the Sneeuberg Centre of Floristic Endemis

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11

Stone, Philip. "Geology reviewed for the Falkland Islands and their offshore sedimentary basins, South Atlantic Ocean." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 106, no. 2 (2015): 115–43. http://dx.doi.org/10.1017/s1755691016000049.

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ABSTRACTThe position of the Falkland Islands adjacent to the South American continental margin belies the close association of their geology with that of South Africa. A Mesoproterozoic basement is unconformably overlain by a Silurian to Devonian succession of fluvial to neritic and shallow marine, siliciclastic strata. This is disconformably succeeded by a largely Permian succession that, near its base, includes a glacigenic diamictite and, thence, passes upwards into a succession of deltaic and lacustrine strata. The lithological succession and the character of its deformation bear striking

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12

Mepaiyeda, S., K. Madi, O. Gwavava, C. Baiyegunhi, and L. Sigabi. "Contaminant Delineation of a Landfill Site Using Electrical Resistivity and Induced Polarization Methods in Alice, Eastern Cape, South Africa." International Journal of Geophysics 2019 (December 22, 2019): 1–13. http://dx.doi.org/10.1155/2019/5057832.

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A combination of electrical resistivity and induced polarization methods were applied to a solid waste landfill in Alice, Eastern Cape, South Africa to delineate the lithologic layers and locate possible leachate plumes. Resistivity and IP data were collected along six profiles; VES on two and the dipole-dipole configuration was used in the rest four. The result shows a 4-layered earth system with a shallow depth to the top of the bedrock (<10 m). Contaminants ranging from unsaturated waste with high ion content to dense aqueous phase liquid contaminants, characterized by low resistivity (3

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13

Ballance, A., D. Stephenson, R. A. Chapman, and J. Muller. "A geographic information systems analysis of hydro power potential in South Africa." Journal of Hydroinformatics 2, no. 4 (2000): 247–54. http://dx.doi.org/10.2166/hydro.2000.0022.

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Electrification can reduce the dependence on combustible fuels and therefore also reduce the concomitant health risks. Hydro power is one possible method of generating electric power close to the potential consumers, thereby cutting out expensive reticulation costs in widely spread rural areas. For sustainable electricity generation there must be stream flows of sufficient flow rates down significant slopes. A preliminary assessment of hydro power potential in South Africa was undertaken by estimating actual energy potential calculated from digital maps of slope and runoff. Coefficients of var

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14

Green, A. N., J. A. G. Cooper, N. P. Dlamini, N. N. Dladla, D. Parker, and S. E. Kerwath. "Relict and contemporary influences on the postglacial geomorphology and evolution of a current swept shelf: The Eastern Cape Coast, South Africa." Marine Geology 427 (September 2020): 106230. http://dx.doi.org/10.1016/j.margeo.2020.106230.

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15

Dalu, Mwazvita T. B., Charles M. Shackleton, and Tatenda Dalu. "Influence of land cover, proximity to streams and household topographical location on flooding impact in informal settlements in the Eastern Cape, South Africa." International Journal of Disaster Risk Reduction 28 (June 2018): 481–90. http://dx.doi.org/10.1016/j.ijdrr.2017.12.009.

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16

Rishworth, Gavin M., Mark J. K. Edwards, Carlos Cónsole-Gonella, and Renzo Perissinotto. "Modern active microbialite-metazoan relationships in peritidal systems on the Eastern Cape coast of South Africa: Ecological significance and implication for the palaeontological record." Journal of African Earth Sciences 153 (May 2019): 1–8. http://dx.doi.org/10.1016/j.jafrearsci.2019.02.013.

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17

Mabidi, Annah, Matthew S. Bird, and Renzo Perissinotto. "Assessment of the physicochemical characteristics of surface waterbodies in a region earmarked for shale gas exploration (Eastern Cape Karoo, South Africa)." Marine and Freshwater Research 68, no. 9 (2017): 1626. http://dx.doi.org/10.1071/mf16102.

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The proposed drilling for shale gas resources in the Eastern Cape Karoo region of South Africa has triggered much debate over the potential effects of hydraulic fracturing on water resources. Herein we present results on some limnological aspects of surface waterbodies in this water-scarce region before shale gas exploration. Thirty-three waterbodies (nine dams, 13 depression wetlands and 11 rivers) were sampled in November 2014 and April 2015. Principal component analysis revealed that depression wetlands and rivers had distinct physicochemical signatures, whereas dams were highly variable in

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18

Bordy, Emese M., Sean Linkermann, and Rose Prevec. "Palaeoecological aspects of some invertebrate trace fossils from the mid- to Upper Permian Middleton Formation (Adelaide Subgroup, Beaufort Group, Karoo Supergroup), Eastern Cape, South Africa." Journal of African Earth Sciences 61, no. 3 (2011): 238–44. http://dx.doi.org/10.1016/j.jafrearsci.2011.06.002.

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19

Clemens, J. D., and G. Stevens. "S- to I- to A-type magmatic cycles in granitic terranes are not globally recurring progressions. The cases of the Cape Granite Suite of Southern Africa and central Victoria in southeastern Australia." South African Journal of Geology 124, no. 3 (2021): 565–74. http://dx.doi.org/10.25131/sajg.124.0007.

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Abstract Recurring progression from S- to I- to A-type granites has been proposed for a subset of granitic rocks in eastern Australia. The wider applicability and the validity of this idea is explored using the Cape Granite Suite (CGS) of South Africa and the granitic and silicic volcanic rocks of central Victoria, in southeastern Australia. Within the CGS there is presently little justification for the notion that there is a clear temporal progression from early S-type, through I-type to late A-type magmatism. The I- and S-type rocks are certainly spatially separated. However, apart from a si

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20

Le Roy, Pascal, Claire Gracia-Garay, Pol Guennoc, et al. "Cenozoic tectonics of the Western Approaches Channel basins and its control of local drainage systems." Bulletin de la Société Géologique de France 182, no. 5 (2011): 451–63. http://dx.doi.org/10.2113/gssgfbull.182.5.451.

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Abstract The geology of the Channel Western Approaches is a key to understand the post-rift evolution of the NW European continental margin in relation with the Europe/Africa collision. Despite considerable evidence of Tertiary tectonic inversion throughout the Channel basin, the structures and amplitudes of the tectonic movements remain poorly documented across the French sector of the Western Approaches. The effect of the tectonic inversion for the evolution of the “Channel River”, the major system that flowed into the English Channel during the Plio-Quaternary eustatic lowstands, also needs

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21

Mosavel, H., and D. I. Cole. "Lithostratigraphy of the Prince Albert Formation (Ecca Group, Karoo Supergroup)." South African Journal of Geology 122, no. 4 (2019): 571–82. http://dx.doi.org/10.25131/sajg.122.0035.

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Abstract The Prince Albert Formation is a mudstone-dominated unit, which is located in the central and southwestern part of the Main Karoo Basin and the southernmost part of the Kalahari Basin in South Africa. It is Early Permian (Artinskian to early Kungurian) in age and is stratigraphically located between the underlying Dwyka Group and the overlying Whitehill Formation. In the Main Karoo Basin, its regional extent is limited to the cut-off boundary of the Whitehill Formation along a line from Hertzogville in the Free State to Coffee Bay in the Eastern Cape. Northeast of this boundary, it co

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22

Gastaldo, Robert A., Johann Neveling, John W. Geissman, Sandra L. Kamo, and Cindy V. Looy. "A tale of two Tweefonteins: What physical correlation, geochronology, magnetic polarity stratigraphy, and palynology reveal about the end-Permian terrestrial extinction paradigm in South Africa." GSA Bulletin, June 23, 2021. http://dx.doi.org/10.1130/b35830.1.

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The contact between the Daptocephalus to Lystrosaurus declivis (previously Lystrosaurus) Assemblage Zones (AZs) described from continental deposits of the Karoo Basin was commonly interpreted to represent an extinction crisis associated with the end-Permian mass-extinction event at ca. 251.901 ± 0.024 Ma. This terrestrial extinction model is based on several sections in the Eastern Cape and Free State Provinces of South Africa. Here, new stratigraphic and paleontologic data are presented for the Eastern Cape Province, in geochronologic and magnetostratigraphic context, wherein lithologic and b

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23

Knight, J., and S. W. Grab. "Stratigraphy of late Quaternary mountain slope landforms and deposits in southern Africa and their significance for the dynamics of mountain sediment systems." South African Journal of Geology, July 28, 2021. http://dx.doi.org/10.25131/sajg.124.0037.

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Abstract Mountains are areas of high potential sediment yield due to their steep slopes and generally cool, wet climates. Mountain sediments are moved by gravity-driven and often cryogenically-influenced processes, and captured within valleys or footslopes in the form of screes, alluvial/colluvial fans and terraces, or on hillslopes in the form of solifluction sheets, debris lobes/ridges and openwork block deposits. This study critically examines the geomorphic, sedimentary, stratigraphic and dating evidence from cryogenically-influenced late Quaternary slope deposits found along the highest s

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24

Linol, B., I. Montañez, A. Lombardo, et al. "Towards disentangling climatic and tectonic changes of southernmost Africa using strontium isotope stratigraphy and clumped isotope thermometry." South African Journal of Geology, July 9, 2021. http://dx.doi.org/10.25131/sajg.124.0045.

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Abstract Upper Cretaceous-Cenozoic marine sequences preserved between 30 and 350 masl across southern South Africa record a complex history of climatic and tectonic changes. In this study, we measure the strontium (Sr) isotope composition of fossil shark teeth, echinoderms, corals and oyster shells to chronostratigraphically constrain the ages of these sequences. The method requires careful petrographic screening and micro-drilling of the samples to avoid possible alteration by diagenesis. To assess palaeoenvironmental effects in the shells we measured the Mg/Ca elemental ratios and O isotope

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25

Owolabi, Solomon Temidayo, Kakaba Madi, Ahmed Mukalazi Kalumba, and Berhanu Fanta Alemaw. "Assessment of recession flow variability and the surficial lithology impact: a case study of Buffalo River catchment, Eastern Cape, South Africa." Environmental Earth Sciences 79, no. 8 (2020). http://dx.doi.org/10.1007/s12665-020-08925-4.

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26

Humphries, M. S. "Elemental proxy evidence for late Quaternary palaeoenvironmental change in southern African sedimentary records: interpretation and applications." South African Journal of Geology, July 31, 2021. http://dx.doi.org/10.25131/sajg.124.0046.

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Abstract Sediments are the most important source of Late Quaternary palaeoclimate information in southern Africa, but have been little studied from a geochemical perspective. However, recent advances in analytical techniques that allow rapid and near-continuous elemental records to be obtained from sedimentary sequences has resulted in the increasing use of elemental indicators for reconstructing climate. This paper explores the diverse information that can be acquired from the inorganic component of sediments and reviews some of the progress that has been made over the last two decades in int

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27

Hempel, Susanne, and Burg Flemming. "Benthic Foraminifera of the Agulhas Bank coastal shelf in the vicinity of Plettenberg Bay, South Africa: a reconnaissance survey." Geo-Marine Letters 41, no. 2 (2021). http://dx.doi.org/10.1007/s00367-021-00691-x.

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AbstractThe study area is located on the inner Agulhas Bank around Plettenberg Bay, southern Cape Province, South Africa (Fig. 1). The Agulhas Bank is a transitional environment between the cold-temperate Benguela Current regime of the south-eastern South Atlantic and the warm-temperate Agulhas Current regime of the south-western Indian Ocean. Three distinct faunal assemblages (A, B and C) were identified in the study area. These are aligned in three consecutive, coast-parallel belts, assemblage A forming the inshore belt, assemblage C the offshore belt and assemblage B the in-between belt. As

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28

Odigi, Minapuye Isaac, and Prince Suka Momta. "Application of Radar Imagery to Tectonic, Structural and Geological Studies in Afikpo Basin, Southeastern Benue Trough, Nigeria." Journal of Geography, Environment and Earth Science International, April 5, 2019, 1–9. http://dx.doi.org/10.9734/jgeesi/2019/v20i230104.

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Radar imagery was used to identify geological features and the production of geological maps of the Afikpo basin. The essence of this study was to delineate significant geological and geomorphological features that have not been imaged by the traditional ground field mapping. The application of Radar imagery technique will be relevant to the discovery of subsurface structures that will aid the accumulation or concentration of certain economic minerals or natural resources. It will enhance the identification of significant geological information such as lineaments, geologic structures, drainage

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29

De Wit, Maarten J., Bastien Linol, and Vhuhwavhohau Nengovhela. "Proterozoic–Paleozoic Sedimentary Rocks and Mesozoic–Cenozoic Landscapes of the Cape Mountains Across the Kango Complex Reveal ‘More Gaps Than Record’ from Rodinia and Gondwana to Africa." Geoscience Canada, July 10, 2020, 7–58. http://dx.doi.org/10.12789/geocanj.2020.47.157.

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The Kango (Cango) region flanks the northern margins of the Klein Karoo and the Cape Mountains across the Western Cape Province of South Africa. It preserves a condensed Proterozoic–Paleozoic stratigraphy exposed via a Mesozoic–Cenozoic morphology with a present Alpine-like topography. Its rocks and landscapes have been repeatedly mapped and documented for the past 150 years. Over the last 25 years, we remapped and dated a central-eastern section of this region. The subvertically bedded and cleaved rocks reveal an 8–10 km thick stratigraphy covering more than 700 million years between ca. 1200

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