Zobrazeno 1 - 10
of 1 678
pro vyhledávání: '"Shock metamorphism"'
Autor:
Wolf Uwe Reimold
Publikováno v:
Geosciences, Vol 14, Iss 4, p 105 (2024)
A possible impact crater at Mahout in Oman was recently proposed by Nasir et al. (2023 [1]). They alleged that “crater” morphology, shatter cones, shock metamorphic evidence in quartz, plagioclase, and calcite, as well as initial geochemical info
Externí odkaz:
https://doaj.org/article/a8367e832e0d45e28e2a11c2c831e4a4
Publikováno v:
Minerals, Vol 14, Iss 1, p 18 (2023)
Within the Ca-Al-silicate system, dense, layered hexagonal phases occur at high temperatures and pressures between 20 and 23 GPa. They have been observed both in nature and in experiments. In this study, we describe the endmember with a dominant sixf
Externí odkaz:
https://doaj.org/article/aa82aed177844a14911f02c875d4c386
Publikováno v:
Geosciences, Vol 13, Iss 12, p 363 (2023)
The present work reports on the first evidence of a possible hypervelocity impact crater in the Sultanate of Oman. The impact origin of the structure is determined based on field observations, microscopic observations of shatter cones, planar fractur
Externí odkaz:
https://doaj.org/article/c4dce55eb1e54bfc8a27ed9646fe1dea
Autor:
Tatiana Kaulina, Vladimir Shilovskih, Lyudmila Nerovich, Yevgeny Savchenko, Vladimir Bocharov, Lyudmila Lialina, Vadim Il’chenko
Publikováno v:
Minerals, Vol 13, Iss 10, p 1325 (2023)
Microstructural deformation and the age of monazite (Ce) from diatectite granite of the presumably impact Jarva-Varaka structure in the Kola Region (northeastern Fennoscandian Shield) are presented. Biotite diatectite granite forms lenses in the alum
Externí odkaz:
https://doaj.org/article/d43e607f1db04415a239496cd306c7c6
Akademický článek
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Akademický článek
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Autor:
Haruka Ono, Kosuke Kurosawa, Takafumi Niihara, Takashi Mikouchi, Naotaka Tomioka, Junko Isa, Hiroyuki Kagi, Takuya Matsuzaki, Hiroshi Sakuma, Hidenori Genda, Tatsuhiro Sakaiya, Tadashi Kondo, Masahiro Kayama, Mizuho Koike, Yuji Sano, Masafumi Murayama, Wataru Satake, Takafumi Matsui
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 1, Pp n/a-n/a (2023)
Abstract Basaltic rocks occur widely on the terrestrial planets and differentiated asteroids, including the asteroid 4 Vesta. We conducted a shock recovery experiment with decaying compressive pulses on a terrestrial basalt at the Chiba Institute of
Externí odkaz:
https://doaj.org/article/f6350cc1eb2d493e80a4083a4c6dc48d
Autor:
Jinping Hu, Thomas G. Sharp
Publikováno v:
Progress in Earth and Planetary Science, Vol 9, Iss 1, Pp 1-22 (2022)
Abstract The goal of classifying shock metamorphic features in meteorites is to estimate the corresponding shock pressure conditions. However, the temperature variability of shock metamorphism is equally important and can result in a diverse and hete
Externí odkaz:
https://doaj.org/article/0dee2c41c2464b27b070f7f3070decdc
Publikováno v:
Progress in Earth and Planetary Science, Vol 8, Iss 1, Pp 1-26 (2021)
Abstract Hypervelocity impacts are among the fundamental phenomena occurring during the evolution of the solar system and are characterized by instantaneous ultrahigh pressure and temperature. Varied physicochemical changes have occurred in the build
Externí odkaz:
https://doaj.org/article/b4d869e9801c49d1a82d83cf7cc3e098
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-18 (2021)
Abstract Ringwoodite and wadsleyite are the high-pressure polymorphs of olivine, which are common in shocked meteorites. They are the major constituent minerals in the terrestrial mantle. NWA 8705, an olivine-phyric shergottite, was heavily shocked,
Externí odkaz:
https://doaj.org/article/ec4a122e1f82480dab5af23a939419eb