Relevant bibliographies by topics / Magmatism – South Africa

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Magmatism – South Africa'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Magmatism – South Africa"

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MIZUSAKI, ANA MARIA PIMENTEL, ANTONIO THOMAZ FILHO, and PEDRO DE CESERO. "Ages of the Magmatism and the Opening of the South Atlantic Ocean." Pesquisas em Geociências 25, no. 2 (1998): 47. http://dx.doi.org/10.22456/1807-9806.21166.

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The analysis of published and unpublished 368 K/Ar radiometric ages of basic, intermediate and alkaline volcanic rocks, related to the post-Paleozoic magmatism linked to the opening of the South Atlantic Ocean, yields some important evidence concerning the break up of the Gondwana supercontinent. At the Brazilian Equatorial margin, the Gondwana break up started in the Permo-Triassic, when the opening of the Equatorial South Atlantic Ocean began and spread out south-eastward up to the present day Amazon River mouth. During the middle Jurassic/lower Cretaceous (pre-Aptian), the continuity of thi
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Thomas, R. J., B. M. Eglington, and S. A. Bowring. "Dating the cessation of Kibaran magmatism in Natal, South Africa." Journal of African Earth Sciences (and the Middle East) 16, no. 3 (1993): 247–52. http://dx.doi.org/10.1016/0899-5362(93)90046-s.

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Ashwal, Lewis D., Madelein Patzelt, Mark D. Schmitz, and Kevin Burke. "Isotopic evidence for a lithospheric origin of alkaline rocks and carbonatites: an example from southern Africa." Canadian Journal of Earth Sciences 53, no. 11 (2016): 1216–26. http://dx.doi.org/10.1139/cjes-2015-0145.

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Alkaline rocks and carbonatites, including nepheline syenites, are well established as mantle-derived magmatic products, but the nature and location of their mantle sources is debated. Some workers have used isotopic compositions to infer mixed mantle plume type sources such as EM1, HIMU, and FOZO, implying derivation from the subcontinental asthenosphere. Other models favour an entirely lithospheric source, whereby the magmas, originally formed during intracontinental rifting, became deformed and subducted into the mantle lithosphere during later continental collisions, and constituted part o
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Melankholina, E. N., and N. M. Sushchevskaya. "Tectonics of the Southern Ocean passive margins in the Africa – East Antarctica region." Геотектоника, no. 4 (August 13, 2019): 25–42. http://dx.doi.org/10.31857/s0016-853x2019325-42.

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Based on geological and geophysical data for the conjugate margins of Africa – East Antarctica, the peculiarities of preparation of the breakup central Gondwana supercontinent are discussed. When using the historical approach, a significant inheritance of the Middle-Upper Jurassic tectono-magmatic development from the preceding time is shown. The first location of tectono-magmatic activity in zones of weakness on the proximal margin, its subsequent migration to distal margins and further oceanic opening is established. The geochemical features of magmas of the region and their sources are unde
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Milner, Simon C., Anton P. Le Roex, and Ronald T. Watkins. "Rb-Sr age determinations of rocks from the Okenyenya igneous complex, northwestern Namibia." Geological Magazine 130, no. 3 (1993): 335–43. http://dx.doi.org/10.1017/s001675680002001x.

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AbstractThe Okenyenya igneous complex is one of a suite of intrusions which define a prominent northeast-trending linear feature in Damaraland, northwestern Namibia. Precise Rb–Sr internal isochron ages range from 128.6 ± 1 to 123.4 ± 1.4 Ma for the major phases of intrusion identified within the complex. The tholeiitic gabbros forming the outer rings of the complex, and the later alkali gabbros which form the central hills, cannot be distinguished in terms of Rb–Sr ages, although field relations clearly indicate the younger age of the latter. The intrusionsof nepheline-syenite and essexite co
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THOMAZ FILHO, ANTONIO, ANA MARIA PIMENTEL MIZUSAKI, EDISON JOSE MILANI, and PEDRO DE CESERO. "RIFTING AND MAGMATISM ASSOCIATED WITH THE SOUTH AMERICA AND AFRICA BREAK UP." Revista Brasileira de Geociências 30, no. 1 (2000): 017–19. http://dx.doi.org/10.25249/0375-7536.2000301017019.

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Cook, Y. A. "Precambrian rift-related magmatism and sedimentation, south Victoria Land, Antarctica." Antarctic Science 19, no. 4 (2007): 471–84. http://dx.doi.org/10.1017/s0954102007000612.

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AbstractPrecambrian continental extension is described in detail for the first time in the Victoria Land segment of the Transantarctic Mountains and is comparable with plume related intercontinental rifting of the Afar area, Africa. The Baronick Formation comprises igneous-derived conglomerate, marble and volcanic to sub-volcanic igneous layers. Volcanic and carbonate horizons were eroded in a fluvial or marine environment and provided debris for mass flow and slump deposits which formed in a marginal marine basin in the Precambrian. Clasts in these deposits include basalt, trachyte and comend
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Harmer, R. E. "The Petrogenetic Association of Carbonatite and Alkaline Magmatism: Constraints from the Spitskop Complex, South Africa." Journal of Petrology 40, no. 4 (1999): 525–48. http://dx.doi.org/10.1093/petroj/40.4.525.

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Cuney, Michel. "Felsic magmatism and uranium deposits." Bulletin de la Société Géologique de France 185, no. 2 (2014): 75–92. http://dx.doi.org/10.2113/gssgfbull.185.2.75.

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Abstract The strongly incompatible behaviour of uranium in silicate magmas results in its concentration in the most felsic melts and a prevalence of granites and rhyolites as primary U sources for the formation of U deposits. Despite its incompatible behavior, U deposits resulting directly from magmatic processes are quite rare. In most deposits, U is mobilized by hydrothermal fluids or ground water well after the emplacement of the igneous rocks. Of the broad range of granite types, only a few have U contents and physico-chemical properties that permit the crystallization of accessory mineral
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Riley, Teal R., and Kim B. Knight. "Age of Pre-Break-Up Gondwana Magmatism." Antarctic Science 13, no. 2 (2001): 99–110. http://dx.doi.org/10.1017/s0954102001000177.

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Extensive outpourings of basalt, and to a lesser extent rhyolite, are closely associated with continental break-up and plume–lithosphere interactions. The Gondwana supercontinent began to fragment during Early–Middle Jurassic times and was associated with the eruption of over three million km3 of dominantly basaltic magma. This intense magmatic episode is recorded in volcanic rocks of the Karoo (Africa), Ferrar (Antarctica) and Chon Aike (South America). K–Ar and Rb–Sr whole rock geochronology has consistently failed to produce reliable ages for these volcanic rocks, but in the last four years
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Dissertations / Theses on the topic "Magmatism – South Africa"

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Holwell, David. "Roles of magmatism, contamination and hydrothermal processes in the development of Platreef mineralization, Bushveld Complex, South Africa." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/56160/.

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The Platreef is a highly complex, pyroxenite-hosted Ni-Cu-PGE deposit. It is located at the base of the northern limb of the Bushveld Complex, South Africa, in direct contact with a variety of country rock sediments and Archaean basement. The interaction of the Platreef magma with these diverse country rock lithologies during emplacement had a profound effect on the style and distribution of the mineralization on both regional and local scales. Geometrically, the Platreef was emplaced as a thin, sill-like intrusion, with pre-formed PGE- rich sulfide droplets entrained within the magma. Sulfur
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Misrole, Matthew. "A re-assessment of the geochronology and geochemistry of the Postberg Ignimbrites, Saldanha, Western Cape, South Africa." University of the Western Cape, 2020. http://hdl.handle.net/11394/7733.

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>Magister Scientiae - MSc<br>The Saldania Belt in southern Africa, a product of the Pan-African Saldanian Orogeny, forms part of a system of Neoproterozoic mobile belts that border and weld older cratons on the African continent. It is a low-grade orogenic belt situated along the southwestern margin of the Kalahari Craton and is composed of several inliers of greenschist facies metasedimentary and metavolcanic rocks (Malmesbury Group), unroofed in megaanticlinal hinges of the Permo-Triassic Cape Fold Belt. The Malmesbury Group rocks were syn- and post-tectonically intruded in a pervasive trans
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Lambert, Christopher William. "Granitic melt transport and emplacement along transcurrent shear zones : case study of the Pofadder Shear Zone in South Africa and Namibia." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85682.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The close spatial and temporal relationship of shear-zones and magmas is commonly interpreted to indicate positive feedback between magma migration, granitic emplacement and shear-zone-associated deformation. Emplacement geometries and structural fabrics are however rarely preserved, hampering the study of shear-zones and granitic magmas interactions. This study focuses on an area around the Pofadder Shear Zone (PSZ) in Namibia and South Africa as a case study for granitic bodies, mainly as pegmatite sills and dykes, and th
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May, Sian Elizabeth. "Pan-African magmatism and regional tectonics of South Brazil." Thesis, Open University, 1990. http://oro.open.ac.uk/54167/.

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The Dam Feliciano Belt is a Pan-African mobile belt from the Ribeira orogen of southern Brazil. A detailed field and geochemical traverse along the BR392 road section between Pelotas and Cacapava do SuI identifies two major tectonic domains; the Pelotas Batholith and the Santana Metamorphic Belt, striking NNE-SSW parallel to the major foliation of the belts. The two belts are separated by a Triassic basin with flat lying red beds and interbedded andesites and rhyolites. The Santana Metamorphic Belt is a NW-verging fold belt with a metamorphosed shelf sequence of quartzites, marbles and graphit
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Ramphaka, Priscilla L. "The origin of rhythmic magmatic layering in coarse-grained porphyritic S-type granite of the Peninsula pluton, Cape Granite Suite, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85741.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Rhythmic magmatic layering in granites is an intriguing feature that has been reported from plutons with contrasting chemical compositions from a wide range of tectonic settings. Layered granites are rare and occur in association with volumetrically dominant non-layered rocks having similar composition. Understanding the origin of such layering in granites, particularly from well exposed outcrops, may give crucial insights on the physical-chemical conditions and processes (such as fractional crystallization, size and composition
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Mhlanga, Musa. "Magmatic-petrogenetic & structural relationships of the peninsula granite of the Cape Granite Suite (CGS) with the Malmesbury group, sea point contact, Saldania belt, South Africa." University of Western Cape, 2021. http://hdl.handle.net/11394/8007.

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>Magister Scientiae - MSc<br>The Sea Point contact, Cape Town, South Africa, exposes the contact between the Neoproterozoic Malmesbury Group metasedimentary rocks of the Pan-African Saldania belt and the intrusive S-type Peninsula Granite of the Neoproterozoic-Paleozoic Cape Granite Suite (CGS). The exposure outcrops over an area of approximately 170 m × 60 m with the northern end of the exposure being characterized by the country rock–microgranite intrusive contact. Heading further south, the outcrop transitions to the main contact zone, which is a predominantly gradational zone marked
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Mhlanga, Musa. "Magmatic-petrogenetic & structural relationships of the Peninsula Granite of the Cape Granite Suite (CGS) with the Malmesbury Group, Sea Point contact, Saldania Belt, South Africa." University of the Western Cape, 2020. http://hdl.handle.net/11394/8034.

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>Magister Scientiae - MSc<br>The Sea Point contact, Cape Town, South Africa, exposes the contact between the Neoproterozoic Malmesbury Group metasedimentary rocks of the Pan-African Saldania belt and the intrusive S-type Peninsula Granite of the Neoproterozoic-Paleozoic Cape Granite Suite (CGS). The exposure outcrops over an area of approximately 170 m × 60 m with the northern end of the exposure being characterized by the country rock–microgranite intrusive contact. Heading further south, the outcrop transitions to the main contact zone, which is a predominantly gradational zone marked by sh
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"The Limpopo Complex of Southern Africa: outstanding issues with emphasis on ultrahigh-temperature-high-pressure metamorphism and granitoid magmatism." Thesis, 2012. http://hdl.handle.net/10210/5065.

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Ph.D.<br>Preserved Archean crust dominantly recording lower temperature conditions (greenschist to amphibolites facies), the earliest widespread record of ultrahigh- temperature metamorphism occur in the Neoarchean. Considering that, collisional tectonic setting has been postulated as a possible tectonic scenario for the generation of ultrahigh-temperature metamorphism, sites where Archean cratons underwent collision can be potential sites for preservation of ultrahigh-temperature metamorphic granulites. The Limpopo Complex is a high-grade metamorphic terrain considered to have formed by colli
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Appiah-Nimoh, Frederick. "A geological study of the Platreef at Potgietersrus platinum mine with emphasis on the magmatic processes, contamination and metasomatism." Thesis, 2009. http://hdl.handle.net/10210/1946.

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Gumsley, Ashley Paul. "Towards a magmatic ‘barcode’ for the south-easternmost terrane of the Kaapvaal Craton, South Africa." Thesis, 2013. http://hdl.handle.net/10210/8732.

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M.Sc. (Geology)<br>The south-easternmost Kaapvaal Craton is composed of scattered inliers of Archaean basement granitoid-greenstone terrane exposed through Phanerozoic cover successions. In addition, erosional remnants of the supracrustal Mesoarchaean Pongola Supergroup unconformably overlay this granitoid-greenstone terrane in the same inliers. Into this crust a variety of Precambrian intrusions occur. These are comprised of SE-, ENE- and NE-trending dolerite dykes. Also, the Hlagothi Complex intrudes into Pongola strata in the Nkandla region, particularly the quartzites of the basal Mantonga
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Book chapters on the topic "Magmatism – South Africa"

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Svensen, Henrik H., Stéphane Polteau, Grant Cawthorn, and Sverre Planke. "Sub-volcanic Intrusions in the , South Africa." In Physical Geology of Shallow Magmatic Systems. Springer International Publishing, 2014. http://dx.doi.org/10.1007/11157_2014_7.

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Svensen, Henrik H., Stéphane Polteau, Grant Cawthorn, and Sverre Planke. "Sub-volcanic Intrusions in the , South Africa." In Physical Geology of Shallow Magmatic Systems. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-14084-1_7.

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Svensen, Henrik H., Stéphane Polteau, Grant Cawthorn, and Sverre Planke. "Erratum to: Sub-volcanic Intrusions in the Karoo Basin, South Africa." In Physical Geology of Shallow Magmatic Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/11157_2016_23.

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Svensen, Henrik H., Stéphane Polteau, Grant Cawthorn, and Sverre Planke. "Erratum to: Sub-volcanic Intrusions in the Karoo Basin, South Africa." In Physical Geology of Shallow Magmatic Systems. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-14084-1_23.

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Martin, Hervé, Jean-François Moyen, and Robert Rapp. "The sanukitoid series: magmatism at the Archaean–Proterozoic transition." In Sixth Hutton Symposium on The Origin of Granites and Related Rocks: Proceedings of a Symposium held in Stellenbosch, South Africa, 2- 6 July 2007. Geological Society of America, 2010. http://dx.doi.org/10.1130/2010.2472(02).

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Orme, Antony R. "The Tectonic Framework of South America." In The Physical Geography of South America. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195313413.003.0008.

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Tectonism is the science of Earth movements and the rocks and structures involved therein. These movements build the structural framework that supports the stage on which surface processes, plants, animals and, most recently, people pursue their various roles under an atmospheric canopy. An appreciation of this tectonic framework is thus a desirable starting point for understanding the physical geography of South America, from its roots in the distant past through the many and varied changes that have shaped the landscapes visible today. Tectonic science recognizes that Earth’s lithosphere comprises rocks of varying density that mobilize as relatively rigid plates, some continental in origin, some oceanic, and some, like the South American plate, amalgams of both continental and oceanic rocks. These plates shift in response to deep-seated forces, such as convection in the upper mantle, and crustal forces involving push and pull mechanics between plates. Crustal motions, augmented by magmatism, erosion, and deposition, in turn generate complex three-dimensional patterns. Although plate architecture has changed over geologic time, Earth’s lithosphere is presently organized into seven major plates, including the South American plate, and numerous smaller plates and slivers. The crustal mobility implicit in plate tectonics often focuses more attention on plate margins than on plate interiors. In this respect, it is usual to distinguish between passive margins, where plates are rifting and diverging, and active margins, where plates are either converging or shearing laterally alongside one another. At passive or divergent margins, such as the present eastern margin of the South American plate, severe crustal deformation is rare but crustal flexuring (epeirogeny), faulting, and volcanism occur as plates shift away from spreading centers, such as the Mid-Atlantic Ridge, where new crust is forming. Despite this lack of severe postrift deformation, however, passive margins commonly involve the separation of highly deformed rocks and structures that were involved in the earlier assembly of continental plates, as shown by similar structural legacies in the facing continental margins of eastern South America and western Africa. At active convergent margins, mountain building (orogeny) commonly results from subduction of oceanic plates, collision of continental plates, or accretion of displaced terranes.
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Belcher, Richard W., and Alexander F. M. Kisters. "Syntectonic emplacement and deformation of the Heerenveen batholith: Conjectures on the structural setting of the 3.1 Ga granite magmatism in the Barberton granite-greenstone terrain, South Africa." In Processes on the Early Earth. Geological Society of America, 2006. http://dx.doi.org/10.1130/2006.2405(12).

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McKay, M. P., A. L. Weislogel, W. T. Jackson, J. Dean, and A. Fildani. "Structural and magmatic controls on the turbidites of the Karoo Basin, South Africa." In Tectonics, Sedimentary Basins, and Provenance: A Celebration of the Career of William R. Dickinson. Geological Society of America, 2018. http://dx.doi.org/10.1130/2018.2540(29).

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Hoshide, Takashi, and Masaaki Obata. "Zoning and resorption of plagioclase in a layered gabbro, as a petrographic indicator of magmatic differentiation." In Sixth Hutton Symposium on The Origin of Granites and Related Rocks: Proceedings of a Symposium held in Stellenbosch, South Africa, 2- 6 July 2007. Geological Society of America, 2010. http://dx.doi.org/10.1130/2010.2472(16).

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Conference papers on the topic "Magmatism – South Africa"

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Scholz, Christopher A. "Advancing Models of Facies Variability and Lacustrine Source Rock Accumulation in Rifts: Implications for Exploration." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2577056-ms.

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ABSTRACT Important syn-rift hydrocarbon discoveries in the Tertiary East African Rift and in the South Atlantic subsalt basins have in recent years promoted renewed interest in the variability of source and reservoir rock facies in continental rifts. This talk considers several important new observations and developments in our understanding of the sedimentary evolution of lacustrine rift basins. Offshore subsalt basins in the South Atlantic demonstrate the importance of lacustrine carbonates, and especially microbialites, as reservoir facies in extensional systems. The role of rift-related ma
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McKay, Matthew P., Amy L. Weislogel, William T. Jackson, Justin Dean, and Andrea Fildani. "STRUCTURAL AND MAGMATIC CONTROLS ON THE TURBIDITES OF THE KAROO BASIN, SOUTH AFRICA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-305973.

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