 | | 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 |  | 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...vein within the granophyre. Introduction Meteorite impact structures are the most important features of rocky |  | | 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 |  | 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) | | 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) | | 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 |  | 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 |  | 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) | | pseudotachylitic breccias in the central uplifts of very large impact structures: Scaling the melt formation Tanja MOHR-WESTHEIDE*...occurrences of pseudotachylitic breccia (PTB) in impact structures have been strongly debated for decades...these processes; or (5) intrusion of allochthonous impact melt from a coherent melt body has been advocated...meter-sized occurrences from the type location, the Vredefort Dome. This complex Archean to early Proterozoic...the originally >250 km diameter Vredefort impact structure in South Africa. Previously, results of microstructural |  | | 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) | | "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 |  | | 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 |  | | Journal (article/letter/editorial) | | http://meteoritics.org Impact tectonics in the core of the Vredefort dome, South Africa: Implications for...formation in very large impact structures C. LANA, R. L. GIBSON, and W. U. REIMOLD* Impact Cratering Research...Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa *Corresponding author. E-mail: reimoldw@geosciences...accepted 16 June 2003) Abstract–The 80 km wide Vredefort dome presents a unique opportunity to investigate...levels of the central uplift of a very large impact structure. Exposure of progressively older strata in |  | O’Callaghan, J. W., Osinski, G. R., Lightfoot, P. C., Linnen, R. L., Weirich, J. R. (2016) Reconstructing the Geochemical Signature of Sudbury Breccia, Ontario, Canada: Implications for Its Formation and Trace Metal Content. Economic Geology, 111 (7) 1705-1729 doi:10.2113/econgeo.111.7.1705 | Journal (article/letter/editorial) | | 85719-2395 Abstract The Sudbury breccia is an impact-generated pseudotachylitic breccia formed in the...target rocks, and/or (3) injection of allochthonous impact melt from the Sudbury Igneous Complex into the...from six different locations around the Sudbury structure. A mixing model was used to construct the composition...with no requirement for a contribution from the impact melt sheet. Instead, we propose a dynamic, parautochthonous...described by Shand (1916) in the Vredefort impact structure, South Africa, as a rock that originated by |  | | Journal (article/letter/editorial) | | Archean crustal structure of the Kaapvaal craton, South Africa ^ evidence from the Vredefort dome Cristiano...Alexander F.M. Kisters b , W. Uwe Reimold a a Impact Cratering Research Group, School of Geosciences...Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa b Department of Geology, University of Stellenbosch...Stellenbosch, Private Bag X1, Matieland 7602, South Africa Received 2 August 2002; received in revised form...Crystalline Archean basement rocks in the core of the Vredefort dome present a profile through a substantial part |  | | 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 |  | 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 |  | Erickson, Timmons M., Timms, Nicholas E., Kirkland, Christopher L., Tohver, Eric, Cavosie, Aaron J., Pearce, Mark A., Reddy, Steven M. (2017) Shocked monazite chronometry: integrating microstructural and in situ isotopic age data for determining precise impact ages. Contributions to Mineralogy and Petrology, 172 (2) doi:10.1007/s00410-017-1328-2 | Journal (article/letter/editorial) | | situ isotopic age data for determining precise impact ages Timmons M. Erickson1 · Nicholas E. Timms1...records shock deformation from meteorite impact but the effects of impact-related microstructures on the U–Th–Pb...the Vredefort impact structure, South Africa, and impact melt from the Araguainha impact structure, Brazil...orientation mapping of monazite grains from both impact structures reveals a similar combination of crystal-plastic...granular monazite domains are strain-free, having grown during the impact events via consumption of strained |  | | Journal (article/letter/editorial) | | STABLE ISOTOPE EVIDENCE FOR IMPACT-RELATED PSEUDOTACHYLITE FORMATION AT VREDEFORT BY LOCAL MELTING OF DRY...Sciences, University of Cape Town, Rondebosch 7701, South Africa e-mail: chris.harris@uct.ac.za D.S. FOURIE...Sciences, University of Cape Town, Rondebosch 7701, South Africa e-mail: duanefourie@gmail.com A. FAGERENG Department...7701, South Africa e-mail: ake.fagereng@uct.ac.za © 2013 June Geological Society of South Africa ABSTRACT...water content of impact-related granophyre, and pseudotachylite, from various Vredefort Dome localities |  | | Journal (article/letter/editorial) | | allochthonous, possibly impact melt, origin of pseudotachylite from the Vredefort Dome, South Africa Daniel Lieger...Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa Received 18 October 2010; accepted in revised...origin of pseudotachylite bodies formed during impact cratering include: (1) frictional heating, (2)...shock loading, (3) decompression or (4) drainage of impact melt into target rocks. In order to differentiate...composition akin to the average composition of Vredefort Granophyre dikes. Within veins, melt transport |  | 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 |  | | Journal (article/letter/editorial) | | deformation features and impact glass in inclusions from the Vredefort Granophyre, South Africa P. C. BUCHANAN*t...BUCHANAN*t AND W. U. REIl\IIOLD Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand...Witwatersrand, Private Bag 3, WITS 2050, Johannesburg, South Africa 'Present address: Antartic Meteorite Research...revised/arm 2002 March 4) Abstract-The Vredefort Granophyre represents impact melt that was injected downward...fractures in the floor of the Vredefort impact structure, South Africa. This unit contains inclusions |  | 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) | | The age and thermal evolution of the Vredefort impact structure: A single-grain U-Pb zircon study R....Private Bag 3, P O WITS, Johannesburg 2050, South Africa 2Research School of Earth Sciences, The Australian...granite body in the Archean basement core of the Vredefort Dome indicate an age of 2017 _+ 5 Ma for the granite...previously reported age determinations for the Vredefort impact event. Petrographic evidence from the granite...crystallized after the impact shock event, but some doubt remains whether it is a true impact melt, a decompression |  | GRIEVE, Richard A. F., REIMOLD, W. Uwe, MORGAN, Joanna, RILLER, Ulrich, PILKINGTON, Mark (2008) Observations and interpretations at Vredefort, Sudbury, and Chicxulub: Towards an empirical model of terrestrial impact basin formation. Meteoritics & Planetary Science, 43 (5) 855-882 doi:10.1111/j.1945-5100.2008.tb01086.x | Journal (article/letter/editorial) | | interpretations at Vredefort, Sudbury, and Chicxulub: Towards an empirical model of terrestrial impact basin formation...and other characteristics of the Vredefort, Sudbury, and Chicxulub impact structures are described. Assuming...morphology, the observations/interpretations for each structure are compared and extended to the other structures...observations be scaled spatially. In the case of Vredefort and Sudbury, this is accomplished by scaling the...uplift. INTRODUCTION Impact structures are the result of the hypervelocity impact of an asteroidal or |
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