Measuring the shock stage of Itokawa and asteroid regolith grains by electron backscattered diffraction, optical petrography, and synchrotron X‐ray diffraction

Autor: Michael Zolensky, James Martinez, Scott Sitzman, Takashi Mikouchi, Kenji Hagiya, Kazumasa Ohsumi, Mutsumi Komatsu, Tomoki Nakamura, Atsushi Takenouchi, Haruka Ono, Hikari Hasegawa, Kotaro Higashi, Yasuko Terada, Naoto Yagi, Masaki Takata, Hikaru Ozawa, Yuta Taki, Yuta Yamatsuta, Arashi Hirata, Ayaka Kurokawa, Shoki Yamaguchi

Publikováno v: Meteoritics & Planetary Science. 57:1060-1078

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d239eefc8152adfa5eeab27c5e91dae
https://doi.org/10.1111/maps.13808

Mineralogy and petrography of the Almahata Sitta ureilite

Autor: Jon M. Friedrich, James Martinez, Matthew W. Colbert, T. Kurihara, Jessica A. Maisano, Michael E. Zolensky, Andrew Steele, Marc Fries, Loan Le, Romy D. Hanna, Stefanie N. Milam, Wataru Satake, K. Ross, Scott A. Sandford, Kazumasa Ohsumi, Peter Jenniskens, Georg Ann Robinson, Cyrena Anne Goodrich, Hiroshi Takeda, Kenji Hagiya, Richard A. Ketcham, Jason S. Herrin, Takashi Mikouchi, Muawia H. Shaddad, Douglas Rumble

Publikováno v: Meteoritics & Planetary Science. 45:1618-1637

– We performed a battery of analyses on 17 samples of the Almahata Sitta meteorite, identifying three main lithologies and several minor ones present as clasts. The main lithologies are (1) a pyroxene-dominated, very porous, highly reduced litholog

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17c7b1dc02cf7f85c346afa9a65dad40
https://doi.org/10.1111/j.1945-5100.2010.01128.x

Comparing Wild 2 particles to chondrites and IDPs

Autor: Hugues Leroux, Kazushige Tomeoka, Kenji Hagiya, Rhonda M. Stroud, Ichiro Ohnishi, Michael A. Velbel, Naotaka Tomioka, Steven B. Simon, Lindsay P. Keller, John P. Bradley, Anton T. Kearsley, Thomas J. Zega, Hope A. Ishii, Michael E. Zolensky, Graciela Matrajt, Giles A. Graham, Frans J. M. Rietmeijer, Keiko Nakamura-Messenger, Alexander N. Krot, Falko Langenhorst, Donald E. Brownlee, Miaofang Chi, Takashi Mikouchi, Lawrence Grossman, John Bridges, M. K. Weisberg, Tomoki Nakamura, David J. Joswiak, Thomas Stephan, Kazumasa Ohsumi, Matthieu Gounelle, Zu Rong Dai

Publikováno v: ResearcherID
Scopus-Elsevier

We compare the observed composition ranges of olivine, pyroxene, and Fe-Ni sulfides in Wild 2 grains with those from chondritic interplanetary dust particles (IDPs) and chondrite classes to explore whether these data suggest affinities to known hydro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b3903bc4345b760f5a7330c5320bc22
https://doi.org/10.1111/j.1945-5100.2008.tb00621.x

Identification of Magnetite in Lunar Regolith Breccia 60016: evidence for oxidised conditions at the lunar surface

Autor: Kenji Hagiya, Takashi Mikouchi, David A. Kring, Michael E. Zolensky, Kazumasa Ohsumi, Channon Visscher, Katherine H. Joy

Publikováno v: Joy, K H, Visscher, C, Zolensky, M E, Mikouchi, T, Hagiya, K, Ohsumi, K & Kring, D A 2015, ' Identification of Magnetite in Lunar Regolith Breccia 60016: evidence for oxidised conditions at the lunar surface ', Meteoritics and Planetary Science . https://doi.org/10.1111/maps.12462

Lunar regolith breccias are temporal archives of magmatic and impact bombardment processes on the Moon. Apollo 16 sample 60016 is an ancient™ feldspathic regolith breccia that was converted from a soil to a rock at ~3.8 Ga. The breccia contains a sm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7cf45f41c6ca7d38fca384d25b79fc3
https://doi.org/10.1111/maps.12462

The crystal data and stability of calcite III at high pressures based on single-crystal X-ray experiments

Autor: Kenji Hagiya, Yuhei Kimura, Yuichi Akahama, Masanori Matsui

Publikováno v: Journal of Mineralogical and Petrological Sciences. 100:31-36

Single-crystal X-ray experiments have been performed for calcite, calcite II, and calcite III at 300 K and pressures up to 4.1 GPa. The volume decrease from calcite to calcite II is estimated to be 0.54 cm3/mol (1.5 %) at 1.5 GPa, which compares well

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d9502ebe82450a9694fb0e14237f2dd
https://doi.org/10.2465/jmps.100.31