 | | Journal (article/letter/editorial) | | minerals in impact melt rocks of the Boltysh structure, Ukraine E. P. GUROV*, S. B. SHEKHUNOVA, and V...National Academy of Sciences of Ukraine, Gontchara Str., 55b, Kiev, Ukraine * Corresponding author. E-mail:...opaque minerals from the impact melt rocks of the Boltysh structure, in the central part of the Ukrainian...rocks with a glassy matrix. Native metalsâcopper, platinum, and silverâwere likely formed due to the hydrothermal...the basement granites of the Boltysh structure. INTRODUCTION The Boltysh impact structure, a circular |  | | Journal (article/letter/editorial) | | recent discovery of an impact crater of K^T boundary age in Ukraine raises the possibility of impact...address: bauluz@unizar.es (B. Bauluz). associated platinum-group element ratios, the presence of unusual...references therein). The Chicxulub crater in Yucatan, Mexico, is the only crater to be con¢rmed with an isotopic...Recent studies have shown that the Boltysh impact crater in Ukraine, which is 25 km in diameter, is 65...0.50 1.05 15.90 49.50 3.99 25.20 3.86 100 tysh crater are shown in Table 2. AEM analyses are reported |  | | Journal (article/letter/editorial) | | from platinum-group elements (rhenium and gold) in borehole samples from the Clearwater East crater (Canada)...(Canada) and the Boltysh impact crater (Ukraine) GERHARDSCHMIDT Institut fur Kernchemie, Johannes Gutenberg-Universit...boreholes from the Boltysh impact crater (Ukraine) and six samples from the East Clearwater crater (Canada) were...impact melt rock samples from a bore hole from Boltysh are low in Ir with an average of 0.2 & 0.1 ng/g...chondrites is 2646pg/g (Palme and Beer, 1993). From Boltysh, so far only eight samples have been analyzed for |  | | Book | | sections, where the distal ejecta from Chicxulub crater is well preserved. Scientifically, the workshop...Impact effect on climate and biosphere Ejecta-crater correlation Impact signatures and geochemical...terrestrial impact crater as a mechanism for generating melt to auto-obliterate the crater. They also model...Popigai impact crater, Siberia. Three types of ejecta facies occur in the upper parts of the crater fill: lithic...at the study and analysis of the Boltysh impact crater in the Ukraine, which initially was thought to |  | | Journal (article/letter/editorial) | | chondrites are also known from the Morokweng impact crater in South Africa (Maier et al. 2006). Discoveries...65.17 0.64 Ma old, 25-km in diameter Boltysh crater in Ukraine (Kelley and Gurov 2002; Gurov et al. 2006;...south-east of Lech owka. Current studies show that the Boltysh impactor might have been a chondrite (McDonald...meteorite from Lech owka has no connection to the Boltysh impactor (B. Schmitz, Koeberl, personal communication)...resurge deposits of the early Late Ordovician Lockne crater, central Sweden. Earth and Planetary Science Letters |  | | Report (issue) | | active lava lake in the Overlook crater within the Halema'uma'u Crater and eruption center of the KÄŤlauea...6. The early Danian hyperthermal event at Boltysh (Ukraine): Relation to Cretaceous-Paleogene boundary...and Mike Widdowson 7. Plant macrofossils from Boltysh crater provide a window into early Cenozoic vegetation...layer in Texas, northeast Mexico, and the impact crater on Yucatan. She demonstrates the coincidence between...the sediments that infilled the Boltysh meteorite impact crater in Ukraine based on carbon isotopes and |  | | Journal (article/letter/editorial) | | the late Maastrichtian zone CF1 are enriched in platinum group elements with a signi¢cant Ir enrichment...new core Yaxcopoil-1 drilled inside the Chicxulub crater revealed late Maastrichtian planktonic foraminiferal...not the KT boundary impact crater, but an earlier pre-KT impact, and the crater was probably much smaller...entrenched view that Chicxulub is the KT impact crater, they reveal a consistent pattern of a pre-KT age...Maastrichtian. One is the 24 km wide Boltysh crater of Ukraine dated at 65.2 Q 0.6 Ma [35] and the other |  | KELLER, Gerta, ADATTE, Thierry, STINNESBECK, Wolfgang, STĂźBEN, Doris, BERNER, Zsolt, KRAMAR, Utz, HARTING, Markus (2004) More evidence that the Chicxulub impact predates the K/T mass extinction. Meteoritics & Planetary Science, 39 (7) 1127-1144 doi:10.1111/j.1945-5100.2004.tb01133.x | Journal (article/letter/editorial) | | AbstractâYaxcopoil-1 (Yax-1), drilled within the Chicxulub crater, was expected to yield the final proof that this...INTRODUCTION In the early 1990s, the Chicxulub crater on YucatĂĄn, Mexico, was hailed as the smoking gun...Cretaceous-Tertiary (K/T) boundary 65 Myr ago. The impact crater size was estimated to be between 180 and 300 km...Microtektites and melt rock from the Chicxulub crater yielded 39Ar/40Ar ages within Âą200 kyr of the K/T...Chicxulub as the long-sought K/T boundary impact crater and the cause for the mass extinction at the end |  | MORGAN, J, LANA, C, KEARSLEY, A, COLES, B, BELCHER, C, MONTANARI, S, DIAZMARTINEZ, E, BARBOSA, A, NEUMANN, V (2006) Analyses of shocked quartz at the global K-P boundary indicate an origin from a single, high-angle, oblique impact at Chicxulub. Earth and Planetary Science Letters, 251 (3) 264-279 doi:10.1016/j.epsl.2006.09.009 | Journal (article/letter/editorial) | | coverage of proximal ejecta in this quadrant of the crater, however, suggests a relatively high impact angle...the Chicxulub impact crater was discovered [9] numerous studies of this crater and the KâP boundary led...of N 15°. Although asymmetries in the apparent crater structure have been used to estimate impact angle...quartz is asymmetrically distributed around the crater and, if so, whether that distribution offers a...N45° show continuous ejecta deposits around the crater. b) KâP paleogeographic map showing maximum size |  | | Report (chapter) | | and (iii) the discovery of the large Chicxulub crater in the Yucatan Peninsula, Mexico, possibly the...microspherules could be a result of the Chicxulub crater meteorite impact; however, From: Bojar, A.-V....Chicxulub impact crater is associated with three others (the Boltysh crater in Ukraine, dated 65.2 + 0...Silverpit crater in the North Sea, dated 65 Ma, Stewart & Allen 2002; and the Shiva crater, India, dated...during the KTB suggests that iridium and other platinum group element (PGE) contributions may have been |  | | Journal (article/letter/editorial) | | that type of low-energy impact feature (e.g., the crater-like pits produced 1. Introduction I mpact cratering...km-diameter and roughly 50 kyr-old Meteor Crater (aka Barringer Meteorite Crater) in Arizona is one of the best-preserved...terrain surrounding the crater. Note the pronounced topography of the crater indicated by low-angle sunlight...Tswaing impact crater in South Africa (e.g., Brandt and Reimold, 1995), with its crater bowl seen from...from the uplifted crater rim. After more than 2000 centuries of erosion, its topographic features have been |  | | Book | | illustration: Radar image of the Gosses Bluff impact crater central peak (Australia) acquired in spotlight...Atlas will be very useful to better understand crater formation and evolution and provides a new research...research method that may, hopefully, help new crater ďŹndings. Getting through these pages, it is then both...Maria Libera Battagliere, and Maria Virelli Boltysh, Ukraine . . . . . . . . . . . . . . . . . . . . ....Libera Battagliere, and Maria Virelli Ilyinets, Ukraine . . . . . . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | IMPACT DIAMONDS IN GLASS FROM OTTING QUARRY, RIES CRATER, GERMANY. J. 1. Abbott, R. M. Hough, 1. Gilmore...base of the Otting Quarry, Ries, Germany. The Ries Crater is a 25-km-diameter, l6-m.y.-old structure formed...shallow-level impact-derived deposits makes the crater the ideal site for a detailed investigation of...acid-demineralized residues of impact melt rocks from the Ries Crater revealed the presense of impact diamonds, closely...by the impact responsible for the Chesapeake Bay Crater in southeastern Virginia [ 1-31. In this investigation |  | | Journal (article/letter/editorial) | | Argentina. Introduction: A new possible impact crater was discovered during routine flights by Mr. Jorge...s.l). It has 1.0 km in diameter. Results: The crater feature is a clear ring with a raised rim and a...at the top of the chain. The area all around the crater is full of radial and concentric fractures and...the structure. Conclusions: Sierra de Ambatoâs crater cannot be a volcanic neck or caldera. Its morphology...there are no visible lava floods coming from the crater itself. No volcanic features have been so far reported |  | | Report (issue) | | V., 1991, Chicxulub crater: A possible CretaceousTertiary boundary impact crater: Geology, v. 19, p....another paleoecologic effect, the Wetumpka impact crater apparently functioned as a minor terrestrial (island)...with this local catastrophe. Keywords: Wetumpka, crater, impact structure, Alabama, Cretaceous. INTRODUCTION...97 98 King et al. crater, which probably washed over the early-formed crater rim and mixed with fallback...from subsurface drilling (i.e., two core holes at crater center; discussed in King et al., 2002, 2003). |
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