 | | Journal (article/letter/editorial) | | Shock Metamorphism of Minerals Impact melt glass with a schlieren-type flow texture in a suevite sample...sample from the Chesapeake Bay impact crater, USA Falko Langenhorst1 and Alex Deutsch2 1811-5209/12/0008-0031$2...10.2113/gselements.8.1.31 T he hypervelocity impact of extraterrestrial objects causes unequivocal...nature for just a few seconds âeven during the impact of kilometer-sized projectilesâ resulting in the...comprehensive description of effects related to impact cratering, the reader is referred to French and |  | Salge, T., Stosnach, H., Rosatelli, G., Hecht, L., Reimold, W. U. (2019) Evidence for shockâinduced anhydrite recrystallization and decomposition at the UNAMâ7 drill core from the Chicxulub impact structure. Meteoritics & Planetary Science, 54 (10) 2334-2356 doi:10.1111/maps.13283 | Journal (article/letter/editorial) | | at the UNAM-7 drill core from the Chicxulub impact structure T. SALGE 1,2,3* , H. STOSNACH3, G. ROSATELLI4...obtained 126 km from the center of the Chicxulub impact structure, outside the crater rim, contains a sequence...silicate components during annealing by superheated impact melt. At anhydrite clasts, recrystallization is...and dissociation of sulfates during the Chicxulub impact event. The lack of anhydrite in the KPg ejecta...The response of sedimentary target rocks to the impact may be relevant to environmental changes that would |  | | Journal (article/letter/editorial) | | metamorphic rock from the suevite breccia of the Ries impact crater was studied by scanning-electron microscopy...Boslough 1991; French 1998). At present, about 170 impact structures have been discovered on our planet,...transformations in target rocks of impact craters. The ca. 25 km wide and 600 m deep structure of the Ries in southern...40Ar/39Ar age of 14.3±0.2 Ma measured directly on Ries impact glasses (Buchner et al. 2003). Further argon ages...behaviour of sillimanite may help to recognize fossil impact structures within metamorphic terrains. Similar |  | | 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) | | Heidelberg on 40Ar-39Ar dating continued, applying it to impact craters like, e.g., the N⏠ordlinger Ries (Jessberger...(Jessberger et al. 1978), the Haughton impact structure (Jessberger 1988; Stephan and Jessberger 1992a),...Elmarâs work, and he stayed involved in dating impact events until recently (Schwarz et al. 2016). 40...elemental and isotopic composition of presolar silicon carbides. Meteoritics & Planetary Science 42:1121â1134...Jessberger E. K. 1988. 40Ar-39Ar dating of the Haughton impact structure. Meteoritics 23:233â234. Jessberger E |  | | Journal (article/letter/editorial) | | the Yaxcopoil-1 drill core in the Chicxulub impact structure Horton E. NEWSOM1*, Melissa J. NELSON1, Charles...Oceanview Terrace, Nanaimo, British Columbia, V9V 1G7, Canada *Corresponding author. E-mail: newsom@unm.edu (Received...concentrations in the upper suevite impact breccias than in the lower impact melt deposits by factors of 3...terrestrial impact structures such as the Sudbury structure, the Ries crater, the Manson structure, and craters... Aqueous and hydrothermal processes in Martian impact craters may have contributed to the mobile element |  | | Journal (article/letter/editorial) | | Dating the cooling of exhumed central uplifts of impact structures by the (UâTh)/He method: A case study...Bailey Drive, Fredericton, New Brunswick E3B 5A3, Canada Noble Gas Geochemistry and Geochronology Laboratories...metamorphosed anorthosite from the Manicouagan impact structure were dated by the (UâTh)/He technique. A (UâTh)/He...zircon age of 214 ± 1 Ma (2Ï) derived from the impact melt. Manicouagan's central uplift formed due to...km depth as part of the modiïŹcation stage of the impact process, which has facilitated the dating of its |  | Walton, Erin L., Timms, Nicholas E., Hauck, Tyler E., MacLagan, Ebberly A., Herd, Christopher D.K. (2019) Evidence of impact melting and post-impact decomposition of sedimentary target rocks from the Steen River impact structure, Alberta, Canada. Earth and Planetary Science Letters, 515. 173-186 doi:10.1016/j.epsl.2019.03.015 | Journal (article/letter/editorial) | | elsevier.com/locate/epsl Evidence of impact melting and post-impact decomposition of sedimentary target...target rocks from the Steen River impact structure, Alberta, Canada Erin L. Walton a,b,â , Nicholas E. Timms...Centre Campus, 10700 104 Ave, Edmonton, AB, T5J 4S2, Canada Department of Earth and Atmospheric Sciences, University...Earth Science Building, Edmonton, AB, T6G 2E3, Canada c Department of Applied Geology, The Institute...Atria Building, 4999 98 Ave, Edmonton, AB, T6B 2X3, Canada b a r t i c l e i n f o Article history: Received |  | | Journal (article/letter/editorial) | | activity, large igneous province formation and impact craters. Surface enrichment of mineral sand deposits...potential Analogue research Ores Hydrothermal deposits Impact cratering 1. Introduction The economic mineralization...fracture systems, channels and valley networks, and impact craters (Carr, 1990). The large variations in the...Mauna Loa. Most researchers consider the Tharsis region the surface expression of a mantle plume on a stationary...above, the southern highlands are littered with impact craters. Unlike on Earth, plate tectonics and recycling |  | | Journal (article/letter/editorial) | | (2005) IMPACT-RELATED Ca-METASOMATISM IN CRYSTALLINE TARGET-ROCKS FROM THE CHARLEVOIX STRUCTURE, QUEBEC...QUEBEC, CANADA CLAUDIA A. TREPMANN§ AND THOMAS GĂTTE Institut fĂŒr Geologie, Mineralogie und Geophysik, Ruhr-UniversitĂ€t...Bailey Drive, Fredericton, New Brunswick, E3B 5A3, Canada ABSTRACT The mineralogy and microstructure of...target-rocks from the 54-kmdiameter Charlevoix impact structure, in eastern Quebec, have been investigated...quartz partly shows a fibrous or spherulitic structure, indicating successive stages of precipitation |  | | 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) | | importance of being cratered: The new role of meteorite impact as a normal geological process Bevan M. FRENCH...past development of impact geology and of the newly recognized importance of impact events in terrestrial...range of impact effects preserved on the Earth, to apply the knowledge obtained from impact phenomena...exotic field of impact geology with mainstream geosciences. Since the recognition of an impact event at the...Cretaceous-Tertiary (K-T) boundary, much current activity in impact geology has been promoted by traditionally trained |  | Lindgren, Paula, Hallis, Lydia, Hage, Fredrik S., Lee, Martin R., Parnell, John, Plan, Anders, Doye, Alistair, MacLaren, Ian (2019) A TEM and EELS study of carbon in a melt fragment from the Gardnos impact structure. Meteoritics & Planetary Science, 54 (11) 2698-2709 doi:10.1111/maps.13381 | Journal (article/letter/editorial) | | carbon in a melt fragment from the Gardnos impact structure Paula LINDGREN 1* , Lydia HALLIS 2, Fredrik...carbon-rich melt fragment from the Gardnos impact structure has been studied for a better understanding...structural form(s) of carbon that have been processed by impact melting. The carbon was analyzed in situ in its...grain size. The Gardnos carbon has a graphitic structure but with a large c/a ratio indicating disorder...result of rapid heating to high temperatures during impact, followed by rapid cooling, with not enough time |  | | Journal (article/letter/editorial) | | ..................................... on Disko Island, West Greenland 49 Complex 57 G. HARTMANNand...magmatism formation: An example from the Georgetown region of Northeastern Australia .......................groundwater in a mafic pluton, EastBull Lake,Ontario,Canada . . . . . . . . . . . . . . . . . . . . . . . ...the Keno Hill Ag-Pb-Zn district, Yukon Territory, Canada 1045 R. FENG and R. KERRICH: Geochemistry Im...sediments in the Archean Abitibi greenstone belt, Canada: . . ...... . ....... ........ . . . .._..__.._ |  | | Journal (article/letter/editorial) | | magmatism formation: An example from the Georgetown region of Northeastern Australia .......................groundwater in a mafic pluton, East Bull Lake,Omario,Canada . . . . . . . . . . . . . . . . . . . . . . . ...the Keno Hill Ag-Pb-Zn district, Yukon Territory, Canada . 1045 R. FJZNG and R. KERRICH:Geochemistry of...sediments in the Amhean Abitibi greenstone belt, Canada: Implications for provenance and tectonic setting...KOEBERL,and R. J. FORD: Geochemistry of Darwin impact glass and target rocks ..................... |  | | Journal (article/letter/editorial) | | core of the Yaxcopoil-1 borehole, Chicxulub impact structure, Mexico Lukas ZĂRCHER* and David A. KRING...samples from the Chicxulub crater indicate that the impact generated a hydrothermal system. Relative textural...occurs 30 m above the impact melt. The lack of mineralogical zoning about the impact melt and convective...large volumes of the Earthâs crust. At the Siljan impact crater, drilling and surface sampling indicate...fluids affected the entire 52 km diameter of the structure down to a depth of at least 1.2 km (Komor et al |  | Arvidson, Raymond E., Squyres, Steven W., Morris, Richard V., Knoll, Andrew H., Gellert, Ralf, Clark, Benton C., Catalano, Jeffrey G., Jolliff, Brad L., McLennan, Scott M., Herkenhoff, Kenneth E., VanBommel, Scott, Mittlefehldt, David W., Grotzinger, John P., Guinness, Edward A., Johnson, Jeffrey R., Bell, James F., Farrand, William H., Stein, Nathan, Fox, Valerie K., Golombek, Matthew P., Hinkle, Margaret A.G., Calvin, Wendy M., de Souza, Paulo A. (2016) High concentrations of manganese and sulfur in deposits on Murray Ridge, Endeavour Crater, Mars. American Mineralogist, 101 (6) 1389-1405 doi:10.2138/am-2016-5599 | Journal (article/letter/editorial) | | University of Guelph, Guelph, Ontario N1G 2W1, Canada 6 Space Science Institute, Boulder, Colorado 80301...surrounding terrains were densely fractured during the impact crater-forming event. Fractures have also propagated...rim segment, called Murray Ridge, is composed of impact breccias with basaltic compositions, as well as...were conducted on two of them: Pinnacle Island and Stuart Island. These rocks have the highest concentrations...minerals. We infer from these unique Pinnacle Island and Stuart Island rock measurements that subsurface precipitation |  | | 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) | | patterns as a potential tool for the identification of impact-deformed carbonate rocks Sarah A. HUSON*, Franklin...parameters of carbonate samples from the Sierra Madera impact crater, west Texas, unshocked equivalent samples...diffraction as a potential tool for distinguishing impact deformed rocks from unshocked and tectonically...collected from well cores drilled outside of the impact crater. Carbonate rocks of the Mission Canyon Formation...significant shock intensities at the Sierra Madera impact crater can be differentiated from tectonically |  | | Journal (article/letter/editorial) | | zoned granitic ~gmatite, southeastern Manitoba, Canada 49 A. H. RANKIN, M. H. RAMSEY, B. COLE& F. VAN...ALBRECHT:Porphyrins from Messel oil shale (Eocene, Germany): Structure elucidation, geochemical and biological significance...LOWE: Noble metal abundances in an Early Archean impact deposit 1365 A. J. BREARLEYand M. PRINZ: CI chondrite-like...KENNEDY:Noble gases in CH4-rich gas fields, Alberta, Canada 1569 T. STEPHANand E. K. JESSBERGER:Isotope systematics...metamorphism: naturally shocked rocks; the Haughton impact structure, Canada 4352 III. K-Ar in experimentally |  | Cherniak, D.J., Watson, E.B., Trappisch, R., Thomas, J.B., Chaussende, D. (2016) Diffusion of helium in SiC and implications for retention of cosmogenic He. Geochimica et Cosmochimica Acta, 192. 248-257 doi:10.1016/j.gca.2016.08.007 | Journal (article/letter/editorial) | | Abstract DiïŹusion of helium has been characterized in silicon carbide of cubic and hexagonal (4H and 6H) forms...presolar grains in the solar nebula. When exposed to impact heating followed by slow cooling, nearly complete...complete loss of He from SiC grains near the site of impact will occur within several hours to a few days.... For SiC grains at greater distance from impact sites, He would be better retained, depending on the...cooling. Helium would also be retained in cases of impact heating followed by very rapid cooling. For these |  | Westall, Frances, Loizeau, Damien, Foucher, FrĂ©dĂ©ric, Bost, Nicolas, Betrand, MarylĂšne, Vago, Jorge, Kminek, Gerhard (2013) Habitability on Mars from a Microbial Point of View. Astrobiology, 13 (9) 887-897 doi:10.1089/ast.2013.1000 | Journal (article/letter/editorial) | | its history. These considerations have a profound impact on the nature and distribution of eventual traces...electrical discharges in the atmosphere (or by impact shock) can create the necessary energy kinetics...necessary for the Strecker reaction are bolide impact shock synthesis in a slightly reducing atmosphere...little more than 50â100 cm away. On early Earth, silicon and oxygen isotope data suggest that global ocean...hydrothermal vents. (a) Sketch showing a porous beehive structure where hydrothermal fluids and seawater can circulate |  | | Journal (article/letter/editorial) | | 75 (2011) 6461â6472 www.elsevier.com/locate/gca Impact-induced phyllosilicate formation from olivine and...to demonstrate waterâmineral interactions during impact events (Furukawa et al., 2007). The products of...formation of phyllosilicates using heat supplied by an impact. The present results and estimations suggest that...has experienced numerous impact events by extraterrestrial bodies. Several impact structures have been recognized...2003). Depending on impact pressures, meteoritic projectiles may disrupt upon impact, even on water (Milner |  | | Journal (article/letter/editorial) | | MO. US.4 Eric J. Reardon. Waterloo, Ontario. Canada Roberta L. Rudnick,â Canberra. ACT. Australia Roman...Ontario, Canada Joseph T. Senftle, Piano, TX. US.4 Denis M. Shaw, Hamilton. Ontario, Canada Ronald J...Spencer, Calgaq, Alberta, Canada Edward T. C. Spooner,â Toronto, Ontario. Canada Garrison Sposito. Berkeley...4CT. Australia Bruce E. Taylor. Ottawa, Ontario. Canada S. Ross Taylor, Canberra, ACT. Australia Stuart...zoned granitic pegmatite. southeastern Manitoba, Canada of magmatic H20-CO2 Sardinia. Italy) 21 fluids |  | | Book | | also occur on Earth, including tectonic, volcanic, impact cratering, aeolian, fluvial, glacial, and possibly...insights and outstanding questions JAMES W . HEAD 2 Impact structures on Earth and Mars NADINE G . BARLOW...geological processes including tectonic, volcanic, impact cratering, aeolian, fluvial, glacial and possibly...processes of wind, annual carbon dioxide frosts, and impact cratering, most active geologic processes on Mars...appreciate and want to thank for their time and efforts Devon Burr, Nathalie Cabrol, Bill Cassidy, Dean Eppler |
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