 | | Journal (article/letter/editorial) | | they are not capable of explaining the subcone structure and the diverging and branching striations that...quantities on four shatter cones from different impact structures and lithologies agree well with model...is related to impact cratering (Dietz 1947), they have been widely used to identify impact structures....USA; and Flynn Creek, USA as eroded impact structures. Many other impact structures on Earth have been discovered... USA (Howard and Offield 1968); Haughton Dome, Canada (Robertson 1975) (Fig. 1B); Vredefort, South Africa |  | Mathieu, J., Kontak, D.J., Turner, E.C., Fayek, M., Layne, G. (2015) Geochemistry of Phanerozoic diagenesis on Victoria Island, NWT, Canada. Chemical Geology, 415. 47-69 doi:10.1016/j.chemgeo.2015.08.016 | Journal (article/letter/editorial) | | Geochemistry of Phanerozoic diagenesis on Victoria Island, NWT, Canada J. Mathieu a,â, D.J. Kontak a, E.C....Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada Department of Geological Science, University of...Wallace Bldg, 125 Dysart Rd, Winnipeg, MB R3T 2N2, Canada Department of Earth Sciences, Alexander Murray...University of Newfoundland, St. John's, NL A1B 3X5, Canada a r t i c l e i n f o Article history: Received...Carbonate diagenesis Dolomite Stable isotopes Trace elements Victoria Island Canada Paleozoic a b s t |  | | Journal (article/letter/editorial) | | meso- to macroscopic recognition criterion for impact structures. Shatter cones exhibit a number of geometric...Possible links between geometric properties with impact or crater parameters have remained controversial...lithology suggests that shatter cones do not occur in impact craters less than a few kilometers in diameter...meso- to macroscopic recognition criterion for impact structures (e.g., Dietz 1960; Melosh 1989; French...obscure. With this special issue dedicated to this impact shock-related fracturing phenomenon we hope to |  | | Journal (article/letter/editorial) | | 1111/maps.12682 Formation of shatter cones in MEMIN impact experiments J. WILK* and T. KENKMANN Institute...diagnostic for the discovery and verification of impact structures. The occurrence of shatter cones is...boundary conditions of shatter cone formation in impact experiments and test a novel approach to qualitatively...pressures of up to 86 GPa. In experiments with lower impact velocities shatter cones could not be found. A...the poorest sample of the record of hypervelocity impact throughout geologic timeâ (Grieve and Therriault |  | | Journal (article/letter/editorial) | | BioSciences, University of Melbourne, Parkville, Victoria 3010, Australia * Corresponding author. E-mail:...08 April 2016) AbstractâOne of the aspects of impact cratering that are still not fully understood is...phenomena. Yet, shatter cones have been applied as an impact-diagnostic criterion for decades without the role...âvalleysâ). Shatter-coned samples from different impact sites and in different lithologies were investigated...cone in sandstone from the Serra da Cangalha impact structure (Brazil) remaining as the most promising candidate |  | 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) | | shocked zircon from the Charlevoix impact structure, Quebec, Canada Martin SCHMIEDER 1,2* , Barry J...vesicular-fluidal impact melt rock from the â„54 km Charlevoix impact structure, Quebec, Canada, suggests an...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 |  | | Book | | Atlas of Terrestrial Impact Craters Encyclopedic Atlas of Terrestrial Impact Craters Enrico Flamini... âą Editors Encyclopedic Atlas of Terrestrial Impact Craters 123 Editors Enrico Flamini Italian Space...Cover illustration: Radar image of the Gosses Bluff impact crater central peak (Australia) acquired in spotlight...shape depends on the impactor kinetic energy, the structure of the ground, and other parameters. They then... Contents Part I Chapters Impacting Bodies and Post-impact ModiïŹcation Processes on Earth . . . . . . . . |  | | Journal (article/letter/editorial) | | Earthâs Impact Events Through Geologic Time: A List of Recommended Ages for Terrestrial Impact Structures...list of recommended ages for proven terrestrial impact structures (n = 200) and deposits (n = 46) sourced...literature. High-precision impact ages can be used to (1) reconstruct and quantify the impact flux in the inner...accreted on Earth through geologic time; (2) utilize impact ejecta as event markers in the stratigraphic record...and hypotheses of synchronous double or multiple impact events in the terrestrial record; (4) assess the |  | | Journal (article/letter/editorial) | | timing of thermal metamorphism, and implications for impact history and mixing in the early Solar System [e...formed on the chondrite parent body, resulted from impact melting, or are fragments of an achondritic projectile...63:2089-2104. Pb-Pb and Rb-Sr DATES FOR ZAGAMI AND NORTHWEST AFRICA 7034 USING CODEX F. S. Anderson1, J. Levine2... we have obtained Pb-Pb dates for Zagami and Northwest Africa (NWA) 7034. We have previously demonstrated...are multiple isotopic reservoirs sampled by the impact process. In the future, we plan to use CODEX to |  | | Report (issue) | | attention had been drawn to a 1.2-kilometer-diameter structure in northern Arizona, originally called Coon Mountain...desert to determine if Coon Butte was a volcanic or impact construct. In the end, he erroneously concluded...early stage in the development of the field of impact cratering, because it curiously is at odds with...Earth did not emerge until Barringer championed the impact concept. There is an important distinction in scale...evident on the Moon. We now understand that larger impact events occur less frequently than smaller ones |  | | Journal (article/letter/editorial) | | accreted, with the lowest effect of thermal or impact metamorphism [1]. The petrological scale for classifying...determine which trends are linked to static or impact metamorphism. Method: Samples were imaged using...metamorphism as well as the loss of equilibrium due to impact events and the onset of shock melting. It is not... Raman provides information on the molecular structure. These techniques are highly synergetic and can...CAMBRIAN VAKKEJOKK BRECCCIA, SWEDEN â EVIDENCE OF AN IMPACT. C. Alwmark1, J. Ormö2, and A. T. Nielsen3, 1Dept |
|
