Výsledky vyhledávání - "S. Holm-Alwmark"

Resolving the age of the Puchezh-Katunki impact structure (Russia) against alteration and inherited 40Ar* – No link with extinctions

Autor: Ludovic Ferrière, Christian Koeberl, S. Holm-Alwmark, Fred Jourdan, Carl Alwmark

Publikováno v: Holm-Alwmark, S, Jourdan, F, Ferriere, L, Alwmark, C & Koeberl, C 2021, ' Resolving the age of the Puchezh-Katunki impact structure (Russia) against alteration and inherited Ar-40*-No link with extinctions ', Geochimica et Cosmochimica Acta, vol. 301, pp. 116-140 . https://doi.org/10.1016/j.gca.2021.03.001

The possibility of a "death from above" cause for biotic crises and extinction events is intriguing, to say the least, but such claims must be supported by reliable and reproducible data, not only impact diagnostic criteria, but also accurate and pre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf9c2241d0c778c61656d47feaaf9d36
https://doi.org/10.1016/j.gca.2021.03.001

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Shock deformation in zircon grains from the Mien impact structure, Sweden

Autor: S. Holm-Alwmark, Josefin Martell, Carl Alwmark, Paula Lindgren

Publikováno v: Martell, J, Alwmark, C, Holm-Alwmark, S & Lindgren, P 2021, ' Shock deformation in zircon grains from the Mien impact structure, Sweden ', Meteoritics and Planetary Science, vol. 56, no. 2, pp. 362-378 . https://doi.org/10.1111/maps.13625

Recognition of impact-induced deformation of minerals is crucial for the identification and confirmation of impact structures as well as for the understanding of shock wave behavior and crater formation. Shock deformed mineral grains from impact stru

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba18c9f7035a58e6e5af15e88f64e535
https://doi.org/10.1111/maps.13625

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Identifying Shocked Feldspar on Mars Using Perseverance Spectroscopic Instruments: Implications for Geochronology Studies on Returned Samples

Autor: S. Shkolyar, S. J. Jaret, B. A. Cohen, J. R. Johnson, O. Beyssac, J. M. Madariaga, R. C. Wiens, A. Ollila, S. Holm-Alwmark, Y. Liu

Publikováno v: Earth, Moon, and Planets. 126

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::554f2fae65a56f1959a89516b86f9daf
https://doi.org/10.1007/s11038-022-09546-6

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Perseverance rover reveals an ancient delta-lake system and flood deposits at Jezero crater, Mars

Publikováno v: Mangold, N, Gupta, S, Gasnault, O, Dromart, G, Tarnas, J D, Sholes, S F, Horgan, B, Quantin-Nataf, C, Brown, A J, Le Mouelic, S, Yingst, R A, Bell, J F, Beyssac, O, Bosak, T, Calef, F, Ehlmann, B L, Farley, K A, Grotzinger, J P, Hickman-Lewis, K, Holm-Alwmark, S, Kah, L C, Martinez-Frias, J, McLennan, S M, Maurice, S, Nunez, J, Ollila, A M, Pilleri, P, Jr, J W R, Rice, M, Simon, J, Shuster, D L, Stack, K M, Sun, V Z, Treiman, A H, Weiss, B P, Wiens, R C, Williams, A J, Williams, N R & Williford, K H 2021, ' Perseverance rover reveals an ancient delta-lake system and flood deposits at Jezero crater, Mars ', Science, vol. 374, no. 6568, pp. 711-717 . https://doi.org/10.1126/science.abl4051
Science
Science, American Association for the Advancement of Science, In press, ⟨10.1126/science.abl4051⟩
Science, In press, ⟨10.1126/science.abl4051⟩

Perseverance images of a delta on Mars The Perseverance rover landed in Jezero crater, Mars, in February 2021. Earlier orbital images showed that the crater contains an ancient river delta that was deposited by water flowing into a lake billions of y

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59b3908846a07b7a9d82fa89adca9c18
https://curis.ku.dk/ws/files/313681295/Mangold_Science_withFiguresHAL_2_42.pdf

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Stratigraphic relationships in Jezero crater, Mars: constraints on the timing of fluvial‐lacustrine activity from orbital observations

Autor: Kjartan M. Kinch, K. M. Stack, Ryan B. Anderson, J. Knade, Linda C. Kah, William Abbey, Ernst Hauber, Vivian Z. Sun, Fred Calef, S. Holm-Alwmark, N. B. Miklusicak, S. Shahrzad, Briony Horgan, J. D. Tarnas, C. Quantin-Nataf, Sanjeev Gupta, K. Svennevig, M Hansen

Publikováno v: Holm-Alwmark, S, Kinch, K M, Hansen, M D, Shahrzad, S, Svennevig, K, Abbey, W J, Anderson, R B, Calef, F J, Gupta, S, Hauber, E, Horgan, B H N, Kah, L C, Knade, J, Miklusicak, N B, Stack, K M, Sun, V Z, Tarnas, J D & Quantin-Nataf, C 2021, ' Stratigraphic Relationships in Jezero Crater, Mars : Constraints on the Timing of Fluvial-Lacustrine Activity From Orbital Observations ', Journal of Geophysical Research: Biogeosciences, vol. 126, no. 7, e2021JE006840 . https://doi.org/10.1029/2021JE006840
Journal of Geophysical Research: Planets
Journal of Geophysical Research: Planets, 2021, 126, ⟨10.1029/2021JE006840⟩

International audience; On February 18, 2021 NASA's Perseverance rover landed in Jezero crater, located at the northwestern edge of the Isidis basin on Mars. The uppermost surface of the present-day crater floor is dominated by a distinct geologic as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cc9edd81aa2f55ff95ee544f71c4d6e
http://hdl.handle.net/10044/1/90416

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An Early Jurassic age for the Puchezh‐Katunki impact structure (Russia) based on 40 Ar/ 39 Ar data and palynology

Autor: Matthias M. M. Meier, S. Holm-Alwmark, Anders Scherstén, Carl Alwmark, Mikhail S. Mashchak, Mikhail V. Naumov, Sofie Lindström, V. L. Masaitis, Maria Herrmann, Fred Jourdan, Ludovic Ferrière

Publikováno v: Meteoritics & Planetary Science. 54:1764-1780

The Puchezh-Katunki impact structure, 40–80 km in diameter, located ~400 km northeast of Moscow (Russia), has a poorly constrained age between ~164 and 203 Ma (most commonly quoted as 167 ± 3 Ma). Due to its relatively large size, the Puchezh-Katu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b16ee6fcd87e66e5aecdc6d9fb908176
https://doi.org/10.1111/maps.13309

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Shocked quartz in distal ejecta from the Ries impact event (Germany) found at ~ 180 km distance, near Bernhardzell, eastern Switzerland

Autor: Carl Alwmark, Ludovic Ferrière, Emma Sheldon, Sofie Lindström, Günter Schweigert, Beda A. Hofmann, Martin J. Whitehouse, S. Holm-Alwmark, Matthias M. M. Meier, Christoph Spötl, Gavin G. Kenny

Publikováno v: Holm-Alwmark, Sanna; Alwmark, Carl; Ferrière, Ludovic; Meier, Matthias M. M.; Lindström, Sofie; Kenny, Gavin G.; Sheldon, Emma; Schweigert, Günter; Spötl, Christoph; Whitehouse, Martin J.; Hofmann, Beda A. (2021). Shocked quartz in distal ejecta from the Ries impact event (Germany) found at ~ 180 km distance, near Bernhardzell, eastern Switzerland. Scientific reports, 11(1) Springer Nature 10.1038/s41598-021-86685-2
Holm-Alwmark, S, Alwmark, C, Ferriere, L, Meier, M M M, Lindstrom, S, Kenny, G G, Sheldon, E, Schweigert, G, Spotl, C, Whitehouse, M J & Hofmann, B A 2021, ' Shocked quartz in distal ejecta from the Ries impact event (Germany) found at similar to 180 km distance, near Bernhardzell, eastern Switzerland ', Scientific Reports, vol. 11, no. 1, 7438 . https://doi.org/10.1038/s41598-021-86685-2
Scientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
Scientific Reports, 11 (1)
Scientific Reports

Impact ejecta formation and emplacement is of great importance when it comes to understanding the process of impact cratering and consequences of impact events in general. Here we present a multidisciplinary investigation of a distal impact ejecta la

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83253d6e849bec28498ece8471092ac0
https://boris.unibe.ch/168194/1/s41598-021-86685-2.pdf

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The effect of low-temperature annealing on discordance of U–Pb zircon ages

Autor: S. Holm-Alwmark, Tomas Næraa, Anders Scherstén, Carl Alwmark, Maria Herrmann, Ulf Söderlund

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
Scientific Reports
Herrmann, M, Soderlund, U, Schersten, A, Naeraa, T, Holm-Alwmark, S & Alwmark, C 2021, ' The effect of low-temperature annealing on discordance of U-Pb zircon ages ', Scientific Reports, vol. 11, no. 1, 7079 . https://doi.org/10.1038/s41598-021-86449-y

Discordant U–Pb data of zircon are commonly attributed to Pb loss from domains with variable degree of radiation damage that resulted from α-decay of U and Th, which often complicates the correct age interpretation of the sample. Here we present U

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d72e55450f02a1f00cef8064b2bd196
https://doi.org/10.1038/s41598-021-86449-y

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Exceptional preservation of reidite in the Rochechouart impact structure, France: New insights into shock deformation and phase transition of zircon

Autor: Paula Lindgren, S. Holm-Alwmark, Philippe Lambert, Ulf Söderlund, Timmons M. Erickson, Anders Plan, Anders Scherstén, Gavin G. Kenny, Carl Alwmark

Publikováno v: Plan, A, Kenny, G G, Erickson, T M, Lindgren, P, Alwmark, C, Holm-Alwmark, S, Lambert, P, Schersten, A & Soderlund, U 2021, ' Exceptional preservation of reidite in the Rochechouart impact structure, France : New insights into shock deformation and phase transition of zircon ', Meteoritics and Planetary Science, vol. 56, no. 10, pp. 1795-1828 . https://doi.org/10.1111/maps.13723

Reidite, the high-pressure zircon (ZrSiO4) polymorph, is a diagnostic indicator of impact events. Natural records of reidite are, however, scarce, occurring mainly as micrometer-sized lamellae, granules, and dendrites. Here, we present a unique seque

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6145641bebe6ea65188f57c39218a8e
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4405

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