 | Goderis, Steven, Kalleson, Elin, Tagle, Roald, Dypvik, Henning, Schmitt, Ralf-Thomas, Erzinger, Jörg, Claeys, Philippe (2009) A non-magmatic iron projectile for the Gardnos impact event. Chemical Geology, 258 (3) 145-156 doi:10.1016/j.chemgeo.2008.09.025 | Journal (article/letter/editorial) | | e o A non-magmatic iron projectile for the Gardnos impact event Steven Goderis a,b, Elin Kalleson c,...N-0316 Oslo, Norway d Department of Geosciences, University of Oslo, N-0316 Oslo, Norway e Department...September 2008 Editor: B. Bourdon Keywords: Gardnos Impact structure Platinum group elements Projectile identiïŹcation...Precambrian Gardnos impact structure in Norway. Fifteen impactite samples, predominantly impact breccias...from the central and northeastern part of the structure, were analyzed for platinum group elements (PGE) |  | French, Bevan M., Koeberl, Christian, Gilmour, Iain, Shirey, Steven B., Dons, Johannes A., Naterstad, Johan (1997) The Gardnos impact structure, Norway: Petrology and geochemistry of target rocks and impactites. Geochimica et Cosmochimica Acta, 61 (4) 873-904 doi:10.1016/s0016-7037(96)00382-1 | Journal (article/letter/editorial) | | OO PI1 SOO16-7037(96)00382-l The Gardnos impact structure, Norway: Petrology and geochemistry of target...Museum, University of Oslo, Sarsgt. 1, N-0562 Oslo, Norway (Received July 11, 1996; accepted in revised fom...fom November 5, 1996) Abstract-The Gardnos structure, Norway is an approximately circular area of anomalously...The original recognition of Gardnos as a deeply eroded impact structure between 900 and 400 Ma old has...shocked rocks (impactites). Deep erosion of the structure has erased the original rim, removed much of the |  | RIIS, F., KALLESON, E., DYPVIK, H., KRĂGLI, S. O., NILSEN, O. (2011) The Ritland impact structure, southwestern Norway. Meteoritics & Planetary Science, 46 (5) 748-761 doi:10.1111/j.1945-5100.2011.01188.x | Journal (article/letter/editorial) | | 1945-5100.2011.01188.x The Ritland impact structure, southwestern Norway F. RIIS1, E. KALLESON2*, H. DYPVIK2...Petroleum Directorate, P.O. Box 600, NO-4003 Stavanger, Norway Department of Geosciences, University of Oslo,...Oslo, Norway 3 The Norwegian Forest and Landscape Institute, P.O. Box 115, NO-1431 AÌs, Norway * Corresponding...Ritland structure is a newly discovered impact structure, which is located in southwestern Norway. The structure...structure is the remnant of a simple crater 2.5 km in diameter and 350 m deep, which was excavated in |  | Gilmour, I, French, B.M, Franchi, I.A, Abbott, J.I, Hough, R.M, Newton, J, Koeberl, C (2003) Geochemistry of carbonaceous impactites from the Gardnos impact structure, Norway. Geochimica et Cosmochimica Acta, 67 (20) 3889-3903 doi:10.1016/s0016-7037(03)00213-8 | Journal (article/letter/editorial) | | of carbonaceous impactites from the Gardnos impact structure, Norway I. GILMOUR,1,* B. M. FRENCH,2 I. A...AbstractâThe Gardnos impact structure in southern Norway is one of only two known impact structures (among...investigation of the geochemistry and petrology of Gardnos impactites (French et al., 1997) with additional...components have been identified in Gardnos impactites: (1) impact-produced diamonds, 0.5 to 1 âźm in size...size, with a cubic crystal structure, predominantly hexagonal morphologies with platey layers and an |  | | Journal (article/letter/editorial) | | impactites (suevite and impact melt rock) within the Gardnos structure, Norway Elin KALLESON1,2*, Henning...Oslo, Norway 2 Natural History Museum, University of Oslo, P.O. 1172 Blindern, NO-0318 Oslo, Norway * Corresponding...of clastrich impact melt rock, are found within the central part of the Gardnos structure. They are preserved...eroded remnants in the relatively small complex impact structure with a present diameter of 5 km. These rocks...subjected to during the impact event and deposition processes. This study discusses the impact-related deposits |  | | Journal (article/letter/editorial) | | search for meteoritic components in terrestrial impact rocks Frederic Moynier a,â, Christian Koeberl b...a b s t r a c t The identiïŹcation of meteorite impact structures on Earth is based on two main criteria:...known impact rocks. We measured the W isotope composition in four samples from different impact structures...structures (Gardnos, Norway; Morokweng, South Africa; Vredefort, South Africa; Ries, Germany) as well as in...Canyon, USA). All these samples are unambiguously impact-produced and in several of those materials a meteoritic |  | | Journal (article/letter/editorial) | | zircon and titanite from the Gardnos impact structure, Norway: Evidence for impact at 546 Ma? E. Kalleson a...University of Oslo, Norway Department of Geosciences, University of Oslo, Norway Received 20 October...titanite were investigated in impactites of the Gardnos structure, a crater formed in Sveconorwegian (ca. 1...likely the incorporation of organic carbon during impact causing black staining of the zircon grains. The...mass spectrometry (ID-TIMS). Zircon grains without impact related features have UâPb data showing moderate |  | Schmieder, Martin, Shaulis, Barry J., Lapen, Thomas J., Buchner, Elmar, Kring, David A. (2019) In situ UâPb analysis of shocked zircon from the Charlevoix impact structure, QuĂ©bec, Canada. Meteoritics & Planetary Science, 54 (8) 1808-1827 doi:10.1111/maps.13315 | Journal (article/letter/editorial) | | analysis of shocked zircon from the Charlevoix impact structure, Quebec, Canada Martin SCHMIEDER 1,2* ...a vesicular-fluidal impact melt rock from the â„54 km Charlevoix impact structure, Quebec, Canada, suggests...Ordovician to Silurian age of 450 20 Ma for the impact. This age is anchored by concordant UâPb results...seemingly chronometrically reset by the Charlevoix impact, but withstood later tectonometamorphic events...Ma and corroborates earlier suggestions that the impact occurred most likely in the Ordovician, and not |  | | Journal (article/letter/editorial) | | http://meteoritics.org Impact melt rocks from the PaasselkĂ€ impact structure (SE Finland): Petrography...rocks from the âŒ10 km and â€1.9 Ga PaasselkĂ€ impact structure, SE Finland, were obtained. In this study...geochemical description of clast-rich PaasselkĂ€ impact melt rocks. Shock metamorphic features comprise...altered. The geochemical composition of the PaasselkĂ€ impact melt rocks is roughly consistent with the compositions...compositions of melt rocks from a number of impact structures located within the crystalline basement of |  | Li, Shan-Shan, Keerthy, S., Santosh, M., Singh, S.P., Deering, C.D., Satyanarayanan, M., Praveen, M.N., Aneeshkumar, V., Indu, G.K., Anilkumar, Y., Sajinkumar, K.S. (2018) Reply to the âComment on Anatomy of impactites and shocked zircon grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central Indiaâ by Pati et al., 2018, Gondwana Research. Gondwana Research, 60. 218-221 doi:10.1016/j.gr.2018.03.018 | Journal (article/letter/editorial) | | grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central Indiaâ...grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central Indiaâ...grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central Indiaâ...grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central Indiaâ...their REE redistribution. US (2018) including impact-related K2O metasomatism and impacted zircon grains |  | | Journal (article/letter/editorial) | | spectroscopy of quartz in upper impactite interval, ICDP drill core LB-07A, Bosumtwi impact crater, Ghana Jared R...spectroscopic examination of quartz from the upper impactite interval of the International Continental Scientific...evidence of shock metamorphism. In the upper impactite, which comprises interbedded polymict lithic breccia...estimates based on quartz alteration in the upper impactite indicate that shock pressures in excess of 20...volatile-rich target for the Bosumtwi impact event. INTRODUCTION The Bosumtwi impact crater, located in the Ashanti |  | Parnell, John, Bowden, Stephen A., Osinski, Gordon R., Lee, Pascal, Green, Paul, Taylor, Colin, Baron, Martin (2007) Organic geochemistry of impactites from the Haughton impact structure, Devon Island, Nunavut, Canada. Geochimica et Cosmochimica Acta, 71 (7) 1800-1819 doi:10.1016/j.gca.2007.01.006 | Journal (article/letter/editorial) | | geochemistry of impactites from the Haughton impact structure, Devon Island, Nunavut, Canada John Parnell...from the 24 km wide and 39 Ma old Haughton impact structure, Canadian High Arctic, is a mixture of fossil...Lower Palaeozoic marine source material before impact and permeates bedrock dolomites. Biomarker maturity...parameters record the thermal eïŹect of the mid-Tertiary impact. Maturity-inïŹuenced sterane, rearranged hopanoid...ratios all increase towards the centre of the impact structure, where thermal alteration was greatest. The |  | HECHT, Lutz, WITTMANN, Axel, SCHMITT, Ralf-Thomas, STöFFLER, Dieter (2004) Composition of impact melt particles and the effects of post-impact alteration in suevitic rocks at the Yaxcopoil-1 drill core, Chicxulub crater, Mexico. Meteoritics & Planetary Science, 39 (7) 1169-1186 doi:10.1111/j.1945-5100.2004.tb01135.x | Journal (article/letter/editorial) | | http://meteoritics.org Composition of impact melt particles and the effects of post-impact alteration in suevitic rocks...this study is to determine the composition of the impact melt, the variation between different types of...of melt particles, and the effects of post-impact hydrothermal alteration. We demonstrate that the compositional...of the target lithologies during impact and subsequent post-impact hydrothermal alteration. Most melt...with overlying carbonate rocks. Multi-stage post-impact hydrothermal alteration involved significant mass |  | | Report (chapter) | | verification of an extraterrestrial component in impact-derived melt rocks or breccias can be of diagnostic...provide confirming evidence for an impact origin of a geological structure. Geochemical methods are used to...not be used as evidence against an impact origin of a crater structure. The determination of such an extraterrestrial...presence of a meteoritic component in a number of impact melt rocks and breccias. This method avoids the...meteoritic component has been established for about 41 impact structures (out of about 150 known on Earth), which |  | | Journal (article/letter/editorial) | | Chemical compositions of impact melt breccias and target rocks from the Tenoumer impact crater, Mauritania...revision accepted 05 August 2005) AbstractâThe impact melt breccias from the Tenoumer crater (consisting...target rock clasts. Analyses of major elements in impact melt rocks show lower contents of SiO2, Al2O3,...basement. In comparison with the bulk analyses of the impact melt, the glass is strongly enriched in Si-Al,...it is depleted both in Mg and Fe; moreover, the impact melt rocks are variably enriched or depleted in |  | | Journal (article/letter/editorial) | | 745â768 Mineralogical and geochemical aspects of impact craters C. KOEBERL* Institute of Geochemistry,...A-1090 Vienna, Austria ABSTR ACT The importance of impact cratering on terrestrial planets is obvious from...obliterate the cratering record. To date only about 170 impact structures have been recognized on the Earthâs...and geochemical criteria are used to identify the impact origin of such structures or related ejecta layers...providing information on the meteorite type. In impact studies there is now a trend towards the use of |  | | Journal (article/letter/editorial) | | feldspar recording low-barometry impact processes, Tenoumer impact structure, Mauritania Steven J. JARET1...accepted 16 April 2014) AbstractâThe Tenoumer impact structure is a small, well-preserved crater within Archean...Reguibat Shield, north-central Mauritania. The structure is surrounded by a thin ejecta blanket of crystalline...(granitic gneiss, granite, and amphibolite) and impact-melt rocks. Evidence of shock metamorphism of quartz...within small bodies of polymict, glass-rich breccia. Impact-related deformation features in oligoclase and |  | | Journal (article/letter/editorial) | | drill core samples from Yaxcopoil-1, Chicxulub impact crater, Mexico Ralf T. SCHMITT,* Axel WITTMANN...from the Yaxcopoil-1 (Yax-1) drill core, Chicxulub impact crater, Mexico, is reported and compared with the...middle suevite (depth of 846â861 m); c) brecciated impact melt rock (depth of 861â885 m); and d) lower suevite...differences when compared with the suevite, while an impact melt rock dike (depth of ~1348 m) is significantly...content were observed in the Yax-1 suevite and the impact-generated dikes. All impactites of Yax-1 and Y6 |  | | Journal (article/letter/editorial) | | University of Oslo, P.O. Box 1047, Blindern, N0316 Oslo, Norway b Geological Survey of Canada-Atlantic, P.O. Box...accepted 28 March 2003 Abstract Studies of submarine impact craters resulting from impacts of comets or asteroids...impacts in marine environments compared to subaerial impact craters. In subaerial impacts, the targets are...in sedimentary processes inside and outside the impact area. Impacts in shallow-water marine (neritic)...the crater structure. The only difference between gravity deposits triggered by an impact or other rare |  | | Journal (article/letter/editorial) | | zircon â a case study from the Rochechouart impact structure, France Cornelia Rasmussen, Daniel F. Stockli...zircon â a case study from the Rochechouart impact structure, France, Geochimica et Cosmochimica Acta (2020)...zircon â a case study from the Rochechouart impact structure, France Cornelia Rasmussen1,2*, Daniel F...*Corresponding author Abstract Age determination of impact structures via the zircon UâPb system remains challenging...Rochechouart impact structure in the northwestern Massif Central of France. For the Rochechouart impact structure |  | Wittmann, A., Kenkmann, T., Schmitt, R. T., Hecht, L., Stöffler, D. (2004) Impact-related dike breccia lithologies in the ICDP drill core Yaxcopoil-1, Chicxulub impact structure, Mexico. Meteoritics & Planetary Science, 39 (6) 931-954 doi:10.1111/j.1945-5100.2004.tb00938.x | Journal (article/letter/editorial) | | org Impact-related dike breccia lithologies in the ICDP drill core Yaxcopoil-1, Chicxulub impact structure...displaced sedimentary megablocks of the Chicxulub impact structure. The suevitic dike breccias are the uppermost...excavation stage as a ground-surge related deposit. The impact melt rock dikes are present in a strongly brecciated...interval as flow textured, anastomozing veinlets of impact melt rock that were altered to clay minerals. The... high initial temperatures. Brecciation of the impact melt rock dikes occurred while they were still |  | | Book | | Shock-Metamorphic Effects in Terrestrial Meteorite Impact Structures Bevan M. French Research Collaborator...Shock-Metamorphic Effects in Terrestrial Meteorite Impact Structures. LPI Contribution No. 954, Lunar and...peninsula as it was 65 m.y. ago, just after the impact of an asteroid or comet about 10 km in diameter...huge Chixculub (Mexico) impact structure. In only a minute after the impact, a transient crater about...................... 16 Chapter 3: FORMATION OF IMPACT CRATERS ...................................... |  | PUURA, V., HUBER, H., KIRS, J., KĂRKI, A., SUUROJA, K., KIRSIMĂE, K., KIVISILLA, J., KLEESMENT, A., KONSA, M., PREEDEN, U., SUUROJA, S., KOEBERL, C. (2004) Geology, petrography, shock petrography, and geochemistry of impactites and target rocks from the KĂ€rdla crater, Estonia. Meteoritics & Planetary Science, 39 (3) 425-451 doi:10.1111/j.1945-5100.2004.tb00103.x | Journal (article/letter/editorial) | | AbstractâThe KĂ€rdla crater is a 4 km-wide impact structure of Late Ordovician age located on Hiiumaa...to be the result of early stage alteration in an impact-induced hydrothermal system. The chemical composition...INTRODUCTION In the Baltic Sea region, 15 meteorite impact structures of Paleozoic age have been identified...depending on high or low sea levels. Among these 15 impact craters (see Fig. 1), six structures of Middle...bestpreserved crater among the Paleozoic marine impact structures in this region. The KĂ€rdla crater formed |  | Li, Shan-Shan, Keerthy, S., Santosh, M., Singh, S.P., Deering, C.D., Satyanarayanan, M., Praveen, M.N., Aneeshkumar, V., Indu, G.K., Anilkumar, Y., Sajinkumar, K.S. (2018) Anatomy of impactites and shocked zircon grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India. Gondwana Research, 54. 81-101 doi:10.1016/j.gr.2017.10.006 | 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...2220 ACCEPTED MANUSCRIPT 2 Abstract The Dhala structure in Central India has been a topic of global interest...interest ever since the report of an ancient meteorite impact event there. Here we present an integrated study |  | | Journal (article/letter/editorial) | | Jacobsen S. B. The Case for an Impact at the Gardnos Impact Structure at 385 Ma [#6476] Previous geochronolgic...geochronolgic studies of the Gardnos Impact Structure have been complicated by an assumed regional Caledonian...regional overprint, and interpret the timing of impact to be 385 Ma. 9:30 a.m. Hauser N. * Reimold W...Zircon: Preliminary Results from the Araguainha Impact Structure, Central Brazil [#6522] Texture and U-Pb isotope...zircon are discussed for a sample of quartzitic impact melt from Araguainha. 9:45 a.m. White L. F. * |
|
