يعرض 1 - 10 نتائج من 88 نتيجة بحث عن '"impact melting"', وقت الاستعلام: 1.29s تنقيح النتائج
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    تقرير

    المساهمون: Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement IRD : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Rutgers, The State University of New Jersey New Brunswick (RU), Rutgers University System (Rutgers), Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG), Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), University of Arizona

    المصدر: https://hal.science/hal-04125476Test ; 2023.

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    دورية أكاديمية

    المصدر: Proceedings of the Japan Academy Series B: Physical and Biological Sciences

    وصف الملف: application/pdf

    العلاقة: Hypervelocity collision and water-rock interaction in space preserved in the Chelyabinsk ordinary chondrite / E. Nakamura, T. Kunihiro, T. Ota et al. // Proceedings of the Japan Academy Series B: Physical and Biological Sciences. — 2019. — Vol. 95. — Iss. 4. — P. 165-177.; https://www.jstage.jst.go.jp/article/pjab/95/4/95_PJA9504B-02/_pdfTest; f65c4c9e-29bd-497a-a99b-23ae43f0050f; http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85064721551Test; http://elar.urfu.ru/handle/10995/75667Test; 85064721551; 000470804000002

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    مؤتمر

    المساهمون: Mugnaioli, E., Campanale, F., Folco, L., Gemmi, M.

    مصطلحات موضوعية: Impact coesite is generally considered a retrograde product formed during pressure release by the crystallization of an amorphous phase. Our recent TEM study, performed on impact ejecta from Kamil crater and the Australasian tektite strewn field, suggests a different coesite formation pathway through subsolidus quartz-to-coesite transformation (Campanale et al. 2021). In Kamil ejecta we found rounded single-crystal coesite domains of 200 nm or less (Fig. up-left). These domains are surrounded by shocked quartz, without any amorphous phase in-between. We also observed larger coesite domains. The larger the domains, the more they appear fragmented and progressively dispersed and resorbed in amorphous silica (Fig. up-right). Our observations suggest that coesite seeds nucleate and grow inside quartz during pressure uploading, probably favored by shock-wave reverberation. Later, when pressure is released and temperature is still high, coesite domains fragment and melt. In impact ejecta from the Australasian tektite strewn field, we again observe coesite crystals embedded in shocked quartz. Coesite crystals have well-developed euhedral habits, which grow at the expense of neighboring quartz, and appear to postdate PDFs and other planar microstructures (Fig. down). In both ejecta, 3D electron diffraction reveals coesite grains displaying a recurrent crystallographic relation with quartz, with (010) coesite plane parallel to {10-11} or {-1011} of quartz. Such evidence suggests a topotactic relation between shocked quartz and impact coesite. Remarkably, both samples experienced realtively fast coolin, which preserved a rock texture only sligthly altered by post-impact melting.

    العلاقة: ispartofbook:23th General Meeting of the International Mineralogical Association; 23th General Meeting of the International Mineralogical Association; http://hdl.handle.net/11568/1153945Test

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