 | | Journal (article/letter/editorial) | | 20, 57±70 Impact-induced melting of Archean granulites in the Vredefort Dome, South Africa. I: anatexis...Private Bag 3, P O WITS, Johannesburg 2050, South Africa (065rlg@cosmos.wits.ac.za) ABSTRACT Mid-crustal...Mid-crustal Archean pelitic granulites in the Vredefort Dome experienced a static, low-P granulite facies...associated with the formation of the dome by meteorite impact at 2.02 Ga. Heating and exhumation were virtually...energy released from nonadiabatic decay of the impact shock wave. Maximum temperatures within a radius |  | | Journal (article/letter/editorial) | | Processes in Planetary Materials: From Hypervelocity Impact to Earthquakes John G. Spray Planetary and Space...rates, it forms shock veins in meteorites and in impact craters, which may contain high-pressure mineral...faults, facilitate the post-shock modification of impact craters, and make landslides more hazardous. 221...tectonic collapse of craters formed by hypervelocity impact. Frictional melting is an important transient phenomenon...(1916) following his work on the Vredefort Structure of South Africa. Shand described anastomosing veins |  | | Journal (article/letter/editorial) | | veins in the central uplift of the Manicouagan impact structure: Context and genesis Marc B. Biren ⁎, John...anorthositic central uplift of the Manicouagan impact structure. They occur as thin (b 2.5 mm wide), linear...predominantly trend radially from the point of impact. The shock veins are distinguished by the development...within the collar rocks of the Vredefort impact structure of South Africa (Martini, 1978, 1991; Spray et...of the structure (i.e., it is now accepted that Vredefort was formed by hypervelocity impact). Only a |  | Pati, Jayanta Kumar, Poelchau, Michael H., Reimold, Wolf Uwe, Nakamura, Norihiro, Kuriyama, Yutaro, Singh, Anuj Kumar (2019) Documentation of shock features in impactites from the Dhala impact structure, India. Meteoritics & Planetary Science, 54 (10) 2312-2333 doi:10.1111/maps.13369 | Journal (article/letter/editorial) | | shock features in impactites from the Dhala impact structure, India Jayanta Kumar PATI1,2*, Michael H....confirmation of any terrestrial meteorite impact structure is the identification of diagnostic shock...confirmed impact structures known on Earth to date, multiple scale-independent tell-tale impact signatures...recorded. Especially some of the pre-Paleozoic impact structures reported so far have yielded limited...rocks of the Dhala structure in India, a deeply eroded Paleoproterozoic impact structure, exhibit a range |  | ANHAEUSSER, C. R., STETTLER, E., GIBSON, R. L., COOPER, G. R. J. (2010) A POSSIBLE MESOARCHAEAN IMPACT STRUCTURE AT SETLAGOLE, NORTH WEST PROVINCE, SOUTH AFRICA: AEROMAGNETIC AND FIELD EVIDENCE. South African Journal of Geology, 113 (4) 413-436 doi:10.2113/gssajg.113.4.413 | Journal (article/letter/editorial) | | POSSIBLE MESOARCHAEAN IMPACT STRUCTURE AT SETLAGOLE, NORTH WEST PROVINCE, SOUTH AFRICA: AEROMAGNETIC AND...the Witwatersrand, Private Bag 3, Wits 2050, South Africa e-mail: carl.anhaeusser@wits.ac.za E. STETTLER...the Witwatersrand, Private Bag 3, Wits 2050, South Africa, and Department of Geology, University of Pretoria...the Witwatersrand, Private Bag 3, Wits 2050, South Africa e-mail: roger.gibson@wits.ac.za G.R.J. COOPER...2050, South Africa e-mail: gordon.cooper®wits.ac.za C> 2010 December Geological Society of South Africa |  | | Book | | relevant protective laws and regulations and therefore free for general use. The publisher, the authors and...maps and institutional affiliations. Printed on acid-free paper This Springer imprint is published by the...and Robert Sinclair Dietz: Pioneers of asteroid impact research Preface Thanks to their long-term geological...number of impact structures and probable impact structures. These include 38 confirmed asteroid impact structures...which constitute possible to probable asteroid impact structures. These structures have been the subject |  | Pati, J.K., Reimold, W.U., Hauser, N. (2018) Comment on “Anatomy of impactites and shocked zircon grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India” by Li et al., 2018, Gondwana Research, 54, 81–101. Gondwana Research, 60. 214-217 doi:10.1016/j.gr.2018.03.019 | Journal (article/letter/editorial) | | grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India”...grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India”...grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India”... 1. Introduction M The age of the Dhala impact structure on the Bundelkhand craton of north-central...lithologies, where they alleged that the age of the impact could be defined into the interval between 2.44 |  | Pati, Jayanta Kumar, Qu, Wen Jun, Koeberl, Christian, Reimold, Wolf Uwe, Chakarvorty, Munmun, Schmitt, Ralf Thomas (2017) Geochemical evidence of an extraterrestrial component in impact melt breccia from the Paleoproterozoic Dhala impact structure, India. Meteoritics & Planetary Science, 52 (4) 722-736 doi:10.1111/maps.12826 | Journal (article/letter/editorial) | | extraterrestrial component in impact melt breccia from the Paleoproterozoic Dhala impact structure, India Jayanta Kumar...Geoanalysis, 26 Baiwanzhuang Dajie, Beijing, Xicheng District 100037, China 4 Department of Lithospheric Research...Paleoproterozoic Dhala structure with an estimated diameter of ~11 km is a confirmed complex impact structure located...located in the central Indian state of Madhya Pradesh in predominantly granitic basement (2.65 Ga), in the...subsurface lithology shows pseudotachylitic breccia, impact melt breccia, suevite, lithic breccias, and postimpact |  | Vinograd, V. L., Perchuk, L. L., Gerya, T. V., Putnis, A., Winkler, B., Gale, J. D. (2007) Order/disorder phase transition in cordierite and its possible relationship to the development of symplectite reaction textures in granulites. Petrology, 15 (5) 427-440 doi:10.1134/s0869591107050013 | Journal (article/letter/editorial) | | oblast, 142432 Russia c Geological Faculty, Moscow State University, Vorob’evy Gory, Moscow, 119192 Russia...set of empirical interatomic potentials, static structure energy calculations of various Al/Si configurations...temperature dependences of the enthalpy, entropy, and free energy of the Al/Si disorder were calculated using...2/3(T1) : 1/3(T2), that characterizes the ordered state, precludes formation of the domains of the orthorhombic...between the free energies of these two structural modifications and show that the higher free energy of |  | Glikson, A. Y., Eggins, S., Golding, S. D., Haines, P. W., Iasky, R. P., Mernagh, T. P., Mory, A. J., Pirajno, F., Uysal, I. T. (2005) Microchemistry and microstructures of hydrothermally altered shock-metamorphosed basement gneiss, Woodleigh impact structure, Southern Carnarvon Basin, Western Australia. Australian Journal of Earth Sciences, 52 (4) 555-573 doi:10.1080/08120090500170336 | Journal (article/letter/editorial) | | shock-metamorphosed basement gneiss, Woodleigh impact structure, Southern Carnarvon Basin, Western Australia...shock-metamorphosed basement gneiss, Woodleigh impact structure, Southern Carnarvon Basin, Western Australia...shock-metamorphosed basement gneiss, Woodleigh impact structure, Southern Carnarvon Basin, Western Australia*...plagioclase – quartz assemblages ( + accessory garnet, corundum, titanite, monazite, zircon), and showing extensive...the basement core uplift of the Woodleigh impact structure, Western Australia. The rocks display extensive |  | | Journal (article/letter/editorial) | | Hydrothermal processes associated with meteorite impact structures: evidence from three Australian examples...Hydrothermal processes associated with meteorite impact structures: evidence from three Australian examples...Hydrothermal processes associated with meteorite impact structures: evidence from three Australian examples...circulation. Impact-generated hydrothermal systems have been documented from several impact structures...data suggest a common evolutionary trend of post-impact hydrothermal activity from early high-temperature |  | | Journal (article/letter/editorial) | | complete resetting of the isotopic system during the impact event and exchange with Pb from the target sediments...the impact event; this is in contrast to zircons extracted from impact melt rocks at some impact structures...of zircon), and corundum (formed by the decomposition of an Al2SiO5 phase to corundum plus SiO2 glass)...largely reset due to the impact event (as is known for zircons from impact melt rocks and in the distal...from several impact structures; see below), or if some of them have retained pre-impact information to |  | | Book | | EARTH SCIENCES Andrew Y. Glikson The Asteroid Impact Connection of Planetary Evolution With Special...asteroid Eros (34.4 × 11.2 × 11.2 km) (NASA) and S3 impact microkrystites, Barberton Greenstone Belt (courtesy...(courtesy G. Byerly) Andrew Y. Glikson The Asteroid Impact Connection of Planetary Evolution With Special...relevant protective laws and regulations and therefore free for general use. While the advice and information...to the material contained herein. Printed on acid-free paper Springer is part of Springer Science+Business |  | | Journal (article/letter/editorial) | | 6296 Differentiation Processes of Substance in Impact Events A. I. Bakhtin, R. Kh. Sungatullin, V. A...6127 Iron Deposit and Its Bearing on the Meteorite Impact Event in the Libyan Glass Area Southwestern Egypt...Bridgmanite-Related Microstructures in L6 Chondrite Northwest Africa 5011 I. S. Bazhan, K. D. Litasov, D. D. Badyukov...“Breccia Towers” at the Santa Fe Impact Structure, New Mexico, USA — Primary Impact/Tectonic Breccia Versus Colluvial/Alluvial...of the Size of Deeply Eroded Impact Structure. Agoudal Impact Structure (Morocco) Case Study M. Čalogović |  | Mory, Arthur J., Iasky, Robert P., Glikson, Andrew Y., Pirajno, Franco (2000) Woodleigh, Carnarvon Basin, Western Australia: a new 120 km diameter impact structure. Earth and Planetary Science Letters, 177 (1) 119-128 doi:10.1016/s0012-821x(00)00031-5 | Journal (article/letter/editorial) | | Western Australia: a new 120 km diameter impact structure Arthur J. Mory a; *, Robert P. Iasky a , Andrew...January 2000 Abstract The Woodleigh multi-ring structure, buried by Cretaceous and, at its centre, Lower...as an impact structure, the largest discovered to date on the Australian continent. An impact origin...that sharply intersects the NS-striking regional structure. At the centre of the basement uplift shock metamorphosed...and potentially of sulfide mineralisation. The impact age is constrained by overlying Lower Jurassic |  | | Journal (article/letter/editorial) | | breccia in the North Range of the Sudbury impact structure Bruno Lafrance a,∗ , David Legault a , Doreen...June 2008 Keywords: Sudbury breccia Sudbury impact structure Cataclasite Trace element geochemistry Rietveld...the North Range of the ca. 1.85 Ga Sudbury impact structure, massive bodies of Sudbury breccia cut across...(SIC), which represents an impact melt sheet that lined the floor of the impact crater. The breccia occurs...reserved. 1. Introduction The formation of large impact craters occurs in three stages: contact-compression |  | | Journal (article/letter/editorial) | | in USA. Abstracts THE 145-Ma MOROKWENG IMPACT, SOUTH AFRICA: AN UNUSUAL, APPROXIMATELY 90-KILOMETER...Ainslie', 'AEC, P.O. Box 582, Pretoria 0001, South Africa (marco@aec.co.za), 2Schonland Research Centre...2050, South Africa, %old Fields Limited, Postnet Suite 252, Private Bag X30500, Houghton 2041, South Africa...Wits 2050, South Africa, SBilliton SA Limited, P.O. Box 61820, Marshalltown 2107, South Africa, 6Council...Geoscience, Private Bag X I 12, Pretoria 0001, South Africa, 'Department of Geology, Rand Afrikaans University |  | | Book | | Archaean Geology of the Kaapvaal Craton, Southern Africa Regional Geology Reviews Series editors Roland... Nelson Mandela University, Port Elizabeth, South Africa François M. Roure, Rueil-Malmaison, France ... Each book aims to provide the reader with the state-of-the-art understanding of a regions geology with...Archaean Geology of the Kaapvaal Craton, Southern Africa 123 Editors Alfred Kröner Institut für Geowissenschaften...Geology University of Johannesburg Auckland Park, South Africa ISSN 2364-6438 ISSN 2364-6446 (electronic) |  | | Book | | Impact Studies Series Editor Christian Koeberl Editorial Board Eric Buffetaut, CNRS, Paris, France Iain...University of the Witwatersrand, Johannesburg, South Africa Virgil L. Sharpton, University of Alaska, Fairbanks...com/series/4698 Billy P. Glass Bruce M. Simonson • Distal Impact Ejecta Layers A Record of Large Impacts in Sedimentary...relevant protective laws and regulations and therefore free for general use. While the advice and information...illustration: Dona Jalufka, Vienna, Austria Printed on acid-free paper Springer is part of Springer Science+Business |  | Schmieder, Martin, Jourdan, Fred, Moilanen, Jarmo, Buchner, Elmar, Öhman, Teemu (2016) A Late Mesoproterozoic
40
Ar/
39
Ar age for a melt breccia from the Keurusselkä impact structure, Finland. Meteoritics & Planetary Science, 51 (2) 303-322 doi:10.1111/maps.12594 | Journal (article/letter/editorial) | | age for a melt breccia from the Keurusselk€a impact structure, Finland Martin SCHMIEDER1,2,8,*, Fred JOURDAN2...central uplift of the ≤30 km Keurusselk€a impact structure, Finland, revealed a thin, dark melt vein...of Kirkkoranta, close to the center of the impact structure. The petrographic analysis of quartz in this...magmatism in south-central Finland and probably reflects the Keurusselk€ a impact, followed by impact-induced...~1150 Ma should be treated as a minimum age for the impact. The new 40Ar/39Ar results are consistent with |  | Piilonen, P. C., McDonald, A. M., Poirier, G., Rowe, R., Larsen, A. O. (2012) The mineralogy and crystal chemistry of alkaline pegmatites in the Larvik Plutonic Complex, Oslo rift valley, Norway. Part 1. Magmatic and secondary zircon: implications for petrogenesis from trace-element geochemistry. Mineralogical Magazine, 76 (3) 649-672 doi:10.1180/minmag.2012.076.3.15 | Journal (article/letter/editorial) | | original surface; and (2) the Skagerrak graben to the south, which is submerged and buried beneath younger Mesozoic...T-type zircon (Fig. 2e). thermal reworking or solid-state diffusion (Corfu et al., 2003). At Lysebo (LACP-27)...This contact is identical to that observed in the south of the Larvik Plutonic Complex at Låven and Stokkøya...The instrument was calibrated using synthetic corundum (PDF 00-10-0173) following a statistical procedure...calibrated using NIST610 standard glass. Inclusion-free (BSEI), visibly transparent areas S-, T- and ST-type |  | | Journal (article/letter/editorial) | | in USA. Q MeteoriticalSociety, 19%. Abstracts IMPACT DIAMONDS IN GLASS FROM OTTING QUARRY, RIES CRATER...University, Walton Hall, Milton Keynes MK7 6AA, UK. Impact diamonds have been found in an acid-demineralized...Crater is a 25-km-diameter, l6-m.y.-old structure formed by the impact of a meteorite with the Earth. The...shallow-level impact-derived deposits makes the crater the ideal site for a detailed investigation of impact phenomena...acid-demineralized residues of impact melt rocks from the Ries Crater revealed the presense of impact diamonds, closely |  | Berg, Sylvia E., Troll, Valentin R., Harris, Chris, Deegan, Frances M., Riishuus, Morten S., Burchardt, Steffi, Krumbholz, Michael (2018) Exceptionally high whole-rock δ18O values in intra-caldera rhyolites from Northeast Iceland. Mineralogical Magazine, 82 (5) 1147-1168 doi:10.1180/mgm.2018.114 | Journal (article/letter/editorial) | | Sciences, University of Cape Town, Rondebosch 7701, South Africa. *E-mail: e.sylviaberg@gmail.com [Received...Powdered sample was spiked with known quantities of corundum to permit accurate determination of the mineral...fluorination methods at University of Cape Town, South Africa. All isotope ratios were measured offline using...contents between 69 and 77 wt. % (on a volatile-free basis, see Figure 4a, Le Maitre et al., 1989). Employing...Arnórsson, S. (1995). Geothermal systems in Iceland: structure and conceptual models—I. Hightemperature areas |  | | Journal (article/letter/editorial) | | evaporative loss during chondrule formation [ I ] . Free evaporation is generally accompanied by isotopic...be rapid. The starting composition is the alkali-free ‘solar’ composition of [4]. Olivine is the dominant...the identity o f the phase (e.g., plagioclase, impact glass) at the pixel under the EMP spot is determined...successfully discriminate between plagioclase and impact glass in the fine fractions of lunar highland soils...to the similar chemistry of the two phases. As impact glass forms from plagioclase and scarce mafic minerals |  | | Book | | relevant protective laws and regulations and therefore free for general use. While the advice and information...to the material contained herein. Printed on acid-free paper Springer is part of Springer Science+Business...Archaean field and isotopic geology and asteroid impact research by Arthur Hickman, Don Lowe, Allen Nutman...LHB. Recent discoveries of near to 14 Archaean impact ejecta units up to 3.48 Ga-old intercalated with...shown to be consistent with the theory of asteroid impact-triggered geodynamic and magmatic activity originally |
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