Experimentally shock-induced melt veins in basalt: Improving the shock classification of eucrites

التفاصيل البيبلوغرافية
العنوان:	Experimentally shock-induced melt veins in basalt: Improving the shock classification of eucrites
المؤلفون:	Ono, Haruka, Kurosawa, Kosuke, Niihara, Takafumi, Mikouchi, Takashi, Tomioka, Naotaka, Isa, Junko, Kagi, Hiroyuki, Matsuzaki, Takuya, Sakuma, Hiroshi, Genda, Hidenori, Sakaiya, Tatsuhiro, Kondo, Tadashi, Kayama, Masahiro, Koike, Mizuho, Sano, Yuji, Murayama, Masafumi, Satake, Wataru, Matsui, Takafumi
سنة النشر:	2022
المجموعة:	Astrophysics Physics (Other)
مصطلحات موضوعية:	Astrophysics - Earth and Planetary Astrophysics, Physics - Geophysics
الوصف:	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 Chiba Institute of Technology, Japan. The sample recorded a range of pressures, and shock physics modeling was conducted to add a pressure scale to the observed shock features. The shocked sample was examined by optical and electron microscopy, electron back-scattered diffractometry, and Raman spectroscopy. We found that localized melting occurs at a lower pressure (~10 GPa) than previously thought (>20 GPa). The shocked basalt near the epicenter represents shock degree C of a recently proposed classification scheme for basaltic eucrites and, as such, our results provide a pressure scale for the classification scheme. Finally, we estimated the total fraction of the basaltic eucrites classified as shock degree C to be ~15% by assuming the impact velocity distribution onto Vesta. Comment: 17 pages, 4 figures, 1 table, 1 supplementary Information, accepted for publication in Geophysical Research Letters
نوع الوثيقة:	Working Paper
DOI:	10.1029/2022GL101009
URL الوصول:	http://arxiv.org/abs/2212.10964
رقم الأكسشن:	edsarx.2212.10964
قاعدة البيانات:	arXiv

الوصف
DOI:	10.1029/2022GL101009