| Kovaleva, E., Huber, M.S., Roelofse, F., Tredoux, M., Praekelt, H. (2018) Pseudotachylite vein hosted by a clast in the Vredefort Granophyre: characterization, origin and relevance. South African Journal of Geology, 121 (1) 51-68 doi:10.25131/sajg.121.0002 | Journal (article/letter/editorial) | Pseudotachylite vein hosted by a clast in the Vredefort Granophyre: characterization, origin and relevance...University of the Free State, 205 Nelson Mandela Drive, 9300 Bloemfontein, South Africa e-mail: kovalevae@ufs...praekehe@ufs.ac.za © 2018 March Geological Society of South Africa Abstract A small, meta-granitic clast with...microcrystalline vein was found enclosed within the Vredefort Granophyre. Semi-quantitative chemical analyses...shock deformation microstructures were found in quartz grains in the granite ground mass, including mosaicism | | | Journal (article/letter/editorial) | felsic and mafic rocks from the Vredefort impact structure, South Africa. Implications for the experimental...University of the Free State, 205 Nelson Mandela Drive, 9300 Bloemfontein, South Africa e-mail: kovalevae@ufs...University of the Free State, 205 Nelson Mandela Drive, 9300 Bloemfontein, South Africa e-mail: fouriefd@ufs...ac.at © 2018 December Geological Society of South Africa Abstract While the formation of tectonic PTs...for all rock types, the mechanism of formation of impact-related pseudotachylites (PTs) is strongly debated | | Rajesh, H.M., Knoper, M.W., Belyanin, G.A., Safonov, O.G., Schmidt, C. (2020) Petalite postdating spodumene in pegmatite as a consequence of the ~2.02 Ga meteorite impact in the Vredefort structure, southern Africa. Lithos, 376. 105760pp. doi:10.1016/j.lithos.2020.105760 | Journal (article/letter/editorial) | of the ~2.02 Ga meteorite impact in the Vredefort structure, southern Africa H.M. Rajesh, M.W. Knoper...of the ~2.02 Ga meteorite impact in the Vredefort structure, southern Africa, LITHOS (2020), https://doi...of the ~2.02 Ga meteorite impact in the Vredefort structure, southern Africa H.M. Rajesh1*, M.W. Knoper2...Department of Geology, University of Johannesburg, South Africa 3 Korzhinskii Institute of Experimental Mineralogy...Petrology and Volcanology, Geological Faculty, Moscow State University, Russia 5 GFZ German Research Centre | | | Journal (article/letter/editorial) | minerals Article Properties of Impact-Related Pseudotachylite and Associated Shocked Zircon and Monazite...Upper Levels of a Large Impact Basin: A Case Study from the Vredefort Impact Structure Elizaveta Kovaleva...of Geology, University of the Free State, Bloemfontein 9300, South Africa Department of Geology, University...University of Pretoria, Pretoria 0028, South Africa Correspondence: kovalevae@ufs.ac.za; Tel.: +27-51-401-9257... Abstract: The Vredefort impact structure in South Africa is deeply eroded to its lowermost | | | Journal (article/letter/editorial) | shock-induced pseudotachylites, Vredefort impact structure, South Africa Elizaveta Kovaleva, Matthew S...shock-induced pseudotachylites, Vredefort impact structure, South Africa, LITHOS (2020), https://doi.org/10...shock-induced pseudotachylites, Vredefort impact structure, South Africa Elizaveta Kovalevaa,* kovalevae@ufs...University of the Free State, 205 Nelson Mandela Drive, 9300 Bloemfontein, South Africa b ur na lP ...of Pretoria, 0028 Pretoria, South Africa Journal Pre-proof ABSTRACT Impact-generated pseudotachylites | | | Journal (article/letter/editorial) | dyke and surrounding host rocks, Vredefort impact structure, South Africa F. D. FOURIE 1* , M. S. HUBER...University of the Free State, 205 Nelson Mandela Drive, 9300 Bloemfontein, South Africa 2 Department of...University of the Free State, 205 Nelson Mandela Drive, 9300 Bloemfontein, South Africa * Corresponding...central part of the Vredefort impact structure are believed to be the remnants of the impact melt sheet, which...relates to the formation and modification of large impact structures. We conducted magnetic and resistivity | | | Journal (article/letter/editorial) | metamorphosed zircon from the Vredefort impact structure, South Africa: a transmission electron microscopic...REIMOLD1)*, HUGUES LEROUX2), and ROGER L. GIBSON1) 1)Impact Cratering Research Group, School of Geosciences...Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa 2)Laboratoire des Structures et Propriétés de...the Vredefort Dome, the central uplift of the ca. 250-300 km diameter Vredefort impact structure in South...South Africa, reveals a nanometer- to micrometer-scale subplanar lamellar structure that is attributed | | | Journal (article/letter/editorial) | Planetary Science 1–17 (2017) doi: 10.1111/maps.12997 Quartz–coesite–stishovite relations in shocked metaquartzites...metaquartzites from the Vredefort impact structure, South Africa John G. SPRAY * and Suporn BOONSUE Planetary...~30 km from the center of the 2.02 Ga Vredefort impact structure. This work focuses on deploying analytical...spatial relations of these silica polymorphs. a-Quartz in the host metaquartzites, away from shock veins...SiO2 phase, now represented by microcrystalline quartz. It is also developed in the matrix of the shock | | | Journal (article/letter/editorial) | of the Vredefort Dome for the thermal and structural evolution of the Witwatersrand Basin, South Africa...Africa R. L. Gibson and W. U. Reimold Impact Cratering Research Group, Department of Geology, University of...of the Witwatersrand, Johannesburg, South Africa With 5 Figures Received July 14, 1998; revised version...version accepted January 26, 1999 Summary The Vredefort Dome represents an area of significant ( ~ 10 kin)...250-300 km diameter, 2023±4 Ma old meteorite impact structure, the extent of which closely correlates with | | | Journal (article/letter/editorial) | coarsecrystalline veins within Vredefort Granophyre, Vredefort impact structure, South Africa E. Kovaleva and M.S...University of the Free State, 205 Nelson Mandela Drive, Bloemfontein 9300, South Africa e-mail: kovalevae@ufs...2018 December Geological Society of South Africa Abstract Vredefort Granophyre dykes are generally considered...part of impact melt, which intruded downward from the melt sheet of the Vredefort impact structure (South...(South Africa). This work reports enigmatic textural inhomogeneities found within the Daskop and southeast | | | Journal (article/letter/editorial) | USA. Meleorilics Original size of the Vredefort Structure: Implications for the geological evolution... P. 0. Wits 2050, Johannesburg, Republic of South Africa. *Correspondence author's e-mail address: atherriault@gsc...deeply eroded Vredefort impact structure within the Witwatersrand Basin, South Africa. Here, we estimate...shock metamorphic features in the floor of the structure and downfaulted Transvaal outliers. Taking erosion...km for the original final rim diameter. An impact structure of this size is expected to have had an original | | Reimold, W.U., Gibson, R.L., Henkel, H. (2008) Scientific comment on “Muundjua et al., 2007: Magnetic imaging of the Vredefort impact crater, South Africa, EPSL 261, 456–468”. Earth and Planetary Science Letters, 273 (3) 393-396 doi:10.1016/j.epsl.2008.06.046 | Journal (article/letter/editorial) | 2007: Magnetic imaging of the Vredefort impact crater, South Africa, EPSL 261, 456–468” W.U. Reimold...Berlin, Invalidenstrasse 43, 10115 Berlin, Germany Impact Cratering Research Group, School of Geosciences...University of the Witwatersrand, 2050 Johannesburg, South Africa Royal Institute of Technology, Department of...magnetics of the Vredefort Dome, the central uplift of the largest and oldest known impact structure on Earth...within the context of trying to understand the impact-related effects on rock magnetic properties but | | | Journal (article/letter/editorial) | INVITED REVIEW The melt rocks of the Vredefort impact structure – Vredefort Granophyre and pseudotachylitic...pseudotachylitic breccias: Implications for impact cratering and the evolution of the Witwatersrand Basin Wolf Uwe Reimold...Reimold,1, Roger L. Gibson Impact Cratering Research Group, School of Geosciences, University of the...Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa Received 22 February 2005; accepted 26 July...the Vredefort impact structure in South Africa an exceptional laboratory for the study of impact-related | | | Journal (article/letter/editorial) | Fluvial transport of impact evidence from cratonic interior to passive margin: Vredefort-derived shocked zircon...zircon on the Atlantic coast of South Africak Stephanie D. Montalvo1,2,*, Aaron J. Cavosie1,2,3, Timmons...microstructures unique to hypervelocity processes. When impact craters erode, detrital shocked minerals can be...of modern alluvium at some of the largest known impact structures. However, the ultimate fate of distally...crater. In South Africa, detrital shocked minerals from the 2020 Ma Vredefort impact structure have been | | | Journal (article/letter/editorial) | in the Vredefort Granophyre: characterization, origin and relevance” by E. Kovaleva et al., South African...uwer@gmail.com © 2019 March Geological Society of South Africa The work by Kovaleva et al. (2018) deals with...single granitic clast in a dike of Vredefort impact melt rock, the Vredefort Granophyre, on farm Daskop 1103...geology synonymous with “friction melt” (the authors state so themselves), there is no way that this term could...refer to two types of impact-generated melt rock of the Vredefort Structure – Vredefort Granophyre and “pseudotachylitic | | | Journal (article/letter/editorial) | central uplift formation in the Vredefort impact structure, South Africa Daniel Lieger a, Ulrich Riller...Street West, Hamilton, Ontario, Canada L8S 4K1 Impact Cratering Research Group, School of Geosciences...Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa a r t i c l e i n f o Article history: Received...Keywords: impact cratering central uplift pseudotachylite deformation Vredefort impact structure a b s...underlying the central portions of large terrestrial impact structures are characterized by the pervasive presence | | Reimold, Wolf Uwe, Hauser, Natalia, Hansen, Bent T., Thirlwall, Matthew, Hoffmann, Marie (2017) The impact pseudotachylitic breccia controversy: Insights from first isotope analysis of Vredefort impact-generated melt rocks. Geochimica et Cosmochimica Acta, 214. 266-281 doi:10.1016/j.gca.2017.07.040 | Journal (article/letter/editorial) | The Impact Pseudotachylitic Breccia Controversy: Insights from First Isotope Analysis of Vredefort Impact-Generated...The Impact Pseudotachylitic Breccia Controversy: Insights from First Isotope Analysis of Vredefort Impact-Generated... The Impact Pseudotachylitic Breccia Controversy: Insights from First Isotope Analysis of Vredefort Impact-Generated...reimold@mfn-berlin.de ABSTRACT Besides impact melt rock, several large terrestrial impact structures, notably the Sudbury...Sudbury (Canada) and Vredefort (South Africa) structures, exhibit considerable occurrences of a second | | | Journal (article/letter/editorial) | Revolutions in the Earth Sciences: Continental Drift, Impact and other Catastrophes by Wolf Uwe Reimold Jet...(http://photojournal.jpl.nasa.gov/catalog/PIA05578). SOUTH AFRICAN JOURNAL OF GEOLOGY, 2007, VOLUME 110 PAGES...DRIFT, IMPACT AND OTHER CATASTROPHES Revolutions in the Earth Sciences: Continental Drift, Impact and other...hu-berlin.de © 2007 March Geological Society of South Africa ABSTRACT This is the story of changing paradigms...processes affecting this planet. The nature of impact cratering as a fundamental universal process and | | Reimold, W.U., Hoffmann, M., Hauser, N., Schmitt, R-T., Zaag, P.T., Mohr-Westerheide, T. (2016) A geochemical contribution to the discussion about the genesis of impact-related pseudotachylitic breccias: Studies of PTB in the Otavi and Kudu Quarries of the Vredefort Dome support the“In Situ Formation”hypothesis. South African Journal of Geology, 119 (3) 453-472 doi:10.2113/gssajg.119.3.453 | Journal (article/letter/editorial) | contribution to the discussion about the genesis of impact-related pseudotachylitic breccias: Studies of PTB...PTB in the Otavi and Kudu Quarries of the Vredefort Dome support the “In Situ Formation” hypothesis W...n.de © 2016 September Geological Society of South Africa Abstract This work is aimed at contributing...formation of massive pseudotachylitic breccias (PTB) in impact structures. In the past this has been debated as...combination of injection of impact melt from a higher level of the impact structure plus assimilation of other | | | Journal (article/letter/editorial) | "PSEUDOTACHYLITE IN THE SOUTH BOUNDARY EAULT ATTHE COOKE SHAET, WITWATERSRAND BASIN, SOUTH AERICA BY PW. MAMBANE...MAMBANE ET AL., SOUTH AERICAN JOURNAL OE GEOLOGY 114.2, 109-120 w.u. REIMOLD Museum für Naturkunde - Leibniz...reimold@mfn-berlin.de © 2012 June Geological Society of South AMca Mambane et al. (2011) presented a geological...occurrence of different fault rock types at the South Boundary Fault on Cooke Shaft, in the West Rand...referred as PTB) being present at that location. They state that based on the conclusion of previous research | | Papapavlou, K., , , Darling, J. R., Moser, D. E., Barker, I. R., White, L. F., Lightfoot, P. C., Storey, C. D., Dunlop, J. (2018) U–Pb isotopic dating of titanite microstructures: potential implications for the chronology and identification of large impact structures. Contributions to Mineralogy and Petrology, 173 (10) doi:10.1007/s00410-018-1511-0 | Journal (article/letter/editorial) | for the chronology and identification of large impact structures K. Papapavlou1 J. Dunlop2 · J. R. Darling2...Nature 2018 Abstract Identifying and dating large impact structures is challenging, as many of the traditional...shock indicator phases can be modified by post-impact processes. Refractory accessory phases, such as...respond with partial U–Pb age resetting during impact events. Titanite is an accessory phase with lower...but its potential as indicator and chronometer of impact-related processes remains poorly constrained. In | | MAMBANE, P. W., HEIN, K. A. A., TWEMLOW, S. G., MANZI, M. S. D. (2011) PSEUDOTACHYLITE IN THE SOUTH BOUNDARY FAULT AT THE COOKE SHAFT, WITWATERSRAND BASIN, SOUTH AFRICA. South African Journal of Geology, 114 (2) 109-120 doi:10.2113/gssajg.114.2.109 | Journal (article/letter/editorial) | PSEUDOTACHYLITE IN THE SOUTH BOUNDARY FAULT AT THE COOKE SHAFT, WITWATERSRAND BASIN, SOUTH AFRICA P.W. MAMBANE...Kusasalethu Shaft, Harmony Gold Ltd, Republic of South Africa e-mail: paul.mambane@harmony.co.za K.A.A. HEIN...Johannesburg, Private Bag 3, WITS, 2050, Republic of South Africa e-mail: kim.ncube-hein@wits.ac.za S.G. TWEMLOW...Office, PO Box 2, Randfontein, 1760, Republic of South Africa e-mail: Steve.Twemlow@randuranium.co.za M.S...Republic of South Africa e-mail: Musa.Manzi@students.wits.ac.za © 2011 June Geological Society of South Africa | | | Journal (article/letter/editorial) | observations on shatter cones in the Vredefort impact structure, South Africa, and evaluation of current hypotheses...Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa 2Museum for Natural History (Mineralogy), Humboldt...Abstract–Shatter cones have been described from many meteorite impact structures and are widely regarded as a diagnostic...diagnostic macroscopic recognition feature for impact. However, the origin of this meso- to macroscopic striated...studies of shatter cones from the Vredefort impact structure and other impact structures are discussed in the | | | Journal (article/letter/editorial) | a constraint on the size of the Vredefort impact crater, South Africa Sybrand de Waal Centre for Research...Department of Geology, University of Pretoria, South Africa Current address: PO Box 21167, Windhoek, Namibia...heimat@iway.na © 2008 September Geological Society of South Africa ABSTRACT The volcanic Roodekraal Complex, situated...40 km from the proposed center of the ~2.02 Ga Vredefort cratering event, overlies the rocks of the Pretoria...as such constrains the size of the transient Vredefort crater to a maximum of ca. 80 km in diameter. | | Erickson, Timmons M., Cavosie, Aaron J., Moser, Desmond E., Barker, Ivan R., Radovan, Henri A., Wooden, Joe (2013) Identification and provenance determination of distally transported, Vredefort-derived shocked minerals in the Vaal River, South Africa using SEM and SHRIMP-RG techniques. Geochimica et Cosmochimica Acta, 107. 170-188 doi:10.1016/j.gca.2012.12.008 | Journal (article/letter/editorial) | distally transported, Vredefort-derived shocked minerals in the Vaal River, South Africa using SEM and SHRIMP-RG...on Earth is incomplete due to the destruction of impact craters by erosion and burial. Shocked minerals...residing in sediments may help further document the impact record. To evaluate the survival of shocked minerals...grains from seven sites along the Vaal River in South Africa, ranging from 103 to 759 km downriver from the...the 2.020 Ga Vredefort impact structure, for the presence of detrital shocked minerals. Detailed observations |
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