Provenance and reconnaissance study of detrital zircons of the Palaeozoic Cape Supergroup in South Africa: revealing the interaction of the Kalahari and Río de la Plata cratons

Fourie, P. H.; Zimmermann, Udo; Beukes, Nicolas J.; Naidoo, Thanusha; Kobayashi, Katsura; Košler, Jan; Nakamura, Eizo; Tait, Joyce; Theron, Johannes N.

doi:10.1007/s00531-010-0619-x

Cited by 34 publications

(12 citation statements)

References 44 publications

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“…The Ordovician age peaks between ca. 462 and 475 Ma found in the Rio do Rasto Formation can be chronocorrelated with the frequency peaks of 469 Ma found in the pre-Carboniferous rocks of the Cape Fold Belt (South Africa) (Fourie et al, 2011), the 478 Ma peak in the Balcarce Formation (Tandilia System) (Rapela et al, 2011) and the 475 Ma peak obtained for the Lol en Formation in the Ventania System, Argentina (Ramos et al, 2013). Recent U-Pb detrital zircon ages from the Devonian Durazno Group (Cerrezuelo and La Paloma formations) in the southern Paran a Basin of Uruguay (Uriz et al, 2016), indicating that the main source areas are Neoproterozoic, with minor contributions derived from Mesoproterozoic and Archean-Paleoproterozoic rocks.…”

Section: Paleozoic Sources: Magmatism and Sedimentary Recyclingsupporting

confidence: 54%

From source-to-sink: The Late Permian SW Gondwana paleogeography and sedimentary dispersion unraveled by a multi-proxy analysis

Alessandretti

Machado

Warren

et al. 2016

Journal of South American Earth Sciences

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The Late Permian sedimentary succession of the Paran a Basin, southern Brazil, provide a valuable source of information about sediment provenance, tectonic processes and, consequently, the paleogeography of the southwestern Gondwana supercontinent. In order to understand the patterns of sedimentary dispersal and reconstruct the Late Permian source-to-sink dynamic, we report a complete series of U-Pb ages and Hf isotopic compositions of detrital zircons from the Rio do Rasto Formation sandstones allied with detailed paleocurrent and sedimentologic data. Our integrated provenance study reveals a consistent sediment transport from the south to the north and northwest. According to the evaluation of zircon ages and Hf isotopes, it was possible to determine four distinct source areas: (i) a distant Late Paleozoic active magmatic arc located in the southwestern Gondwana margin (i.e. Gondwanides Orogen), corresponding to the North Patagonian Massif; (ii) recycling of orthoquartzites from the uplifted Paleozoic Ventania Fold Belt and immature sandstones from the Claromec o Foreland Basin in centraleastern Argentina and the Silurian-Devonian successions of the southern Paran a Basin (central-northern Uruguay) and North Patagonian Massif; (iii) exhumed areas of the Archean-Paleoproterozoic basement and Neoproterozoic to Early Paleozoic mobile belts of the Damara in southwestern Africa and Ribeira Fold Belt in Uruguay and southern Brazil; and (iv) southeastward provenance of Grenvillian (1.2 e1.0 Ga) zircons coming from the mafic to intermediate Mesoproterozoic igneous units of the Namaqua-Natal Belt in South Africa and Namibia. These data allow us to argue that sediments deposited in the Paran a Basin during the Late Permian come from both short-and long-distance source areas. In this context, an important population of Permian detrital zircons comes from the Gondwanides Orogen in the south, probably carried by transcontinental alluvial systems. Close to the source area, antecedent river channels would have eroded older sedimentary rocks of the Ventania Fold Belt, Claromec o and Chaco-Paran a basins and North Patagonian Massif, crosscutting a peripheral bulge and flowing towards the alluvial plain of the intraplate setting to areas further north. Concomitantly, these sediments are reworked by strong winds that even helped carrying the grains to the Paran a Basin depositional site.

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Section: Paleozoic Sources: Magmatism and Sedimentary Recyclingsupporting

confidence: 54%

From source-to-sink: The Late Permian SW Gondwana paleogeography and sedimentary dispersion unraveled by a multi-proxy analysis

Alessandretti

Machado

Warren

et al. 2016

Journal of South American Earth Sciences

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“…Cape margin sediments originate from Palaeozoic sedimentary sequences of the Cape Supergroup (quartz arenites, subgreywackes, shales and sandstones) that were formed by weathering of ancient Kalahari, Patagonia and Río de la Plata Cratons and deposited along rifted margins of Southern Gondowanda ~480–300 Ma 30(ref. 30).…”

Section: Resultsmentioning

confidence: 99%

Distinct iron isotopic signatures and supply from marine sediment dissolution

et al. 2013

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Oceanic iron inputs must be traced and quantified to learn how they affect primary productivity and climate. Chemical reduction of iron in continental margin sediments provides a substantial dissolved flux to the oceans, which is isotopically lighter than the crust, and so may be distinguished in seawater from other sources, such as wind-blown dust. However, heavy iron isotopes measured in seawater have recently led to the proposition of another source of dissolved iron from ‘non-reductive’ dissolution of continental margins. Here we present the first pore water iron isotope data from a passive-tectonic and semi-arid ocean margin (South Africa), which reveals a smaller and isotopically heavier flux of dissolved iron to seawater than active-tectonic and dysoxic continental margins. These data provide in situ evidence of non-reductive iron dissolution from a continental margin, and further show that geological and hydro-climatic factors may affect the amount and isotopic composition of iron entering the ocean.

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“…One possible explanation is that there was a morphological/depositional divide between the cratonic areas and the depositional basins of the Ellsworth-Whitmore Mountains block and the Pensacola and Queen Maud Mountains. In Africa, Fourie et al (2011) suggested that the Namaqua-Natal belt had been a significant morphological divide at the time of deposition of the Cape Supergroup, thus preventing the input of older components from the Kalahari craton. However, it is unlikely that such a barrier persisted for 500 m.y.…”

Section: Older Cratonic Areasmentioning

confidence: 99%

Provenance and age constraints of Paleozoic siliciclastic rocks from the Ellsworth Mountains in West Antarctica, as determined by detrital zircon geochronology

et al. 2017

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New sensitive high-resolution ion microprobe (SHRIMP) U-Pb detrital zircon ages from Cambrian to Permian-Carboniferous siliciclastic units in the Ellsworth Mountains constrain their provenance and maximum depositional age, as well as providing key information as to the tectonic evolution of a problematic region. The Cambrian Heritage Group was deposited in an active continental rift setting and has main zircon components of late Mesoproterozoic-early Neoproterozoic age (ca. 1300-900 Ma) with little to no contributions from older cratons. Two metavolcaniclastic samples of the Union Glacier Formation (lower Heritage Group) have U-Pb zircon ages of ca. 675 Ma, indicating proximal Cryogenian volcanism and thereby raising questions as to the depositional age of this unit. Igneous and metamorphic zircons of late Neoproterozoic-early Cambrian age (650-530 Ma) are a secondary component present in the upper part of this group. The passive-margin sediments of the overlying Upper Cambrian-Devonian Crashsite Group record an up-sequence increase in late Neoproterozoic-Cambrian detrital zircons (ca. 650-480 Ma). The youngest detrital zircons were dated at ca. 480 Ma with major peaks at ca. 530 Ma and 500 Ma. Similar patterns are recorded in the Permian-Carboniferous Whiteout Conglomerate, with main components at ca. 650-500 Ma,

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Provenance and reconnaissance study of detrital zircons of the Palaeozoic Cape Supergroup in South Africa: revealing the interaction of the Kalahari and Río de la Plata cratons

Abstract: In order to facilitate the understanding of the geological evolution of the Kalahari Craton and its relation to South America, the provenance of the first large-scale cratonic cover sequence of the craton,

Cited by 34 publications

References 44 publications

From source-to-sink: The Late Permian SW Gondwana paleogeography and sedimentary dispersion unraveled by a multi-proxy analysis

From source-to-sink: The Late Permian SW Gondwana paleogeography and sedimentary dispersion unraveled by a multi-proxy analysis

Distinct iron isotopic signatures and supply from marine sediment dissolution

Provenance and age constraints of Paleozoic siliciclastic rocks from the Ellsworth Mountains in West Antarctica, as determined by detrital zircon geochronology

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