Experimental study concerning the oblique impact of low- and high-density projectiles on sedimentary rocks

Suzuki, Ayako; Fujita, Yoichi; Harada, Shunya; Kiuchi, Masato; Koumoto, Yasunari; Matsumoto, Eri; Omura, Tomomi; Shigaki, Sae; Taguchi, Erine; Tsujido, Sayaka; Kurosawa, Kosuke; Hasegawa, Susumu; Hirai, Takayuki; Tabata, M.; Tamura, Hideki; Kadono, Toshihiko; Nakamura, Akiko; Arakawa, Masahiko; Sugita, Seiji; Ishibashi, Ko

doi:10.1016/j.pss.2020.105141

Cited by 6 publications

(6 citation statements)

References 32 publications

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“…At the shallowest 𝜃 (= 10°), the cavity consisted of multiple depressions along a line in the direction of the velocity component, as shown in a previous study (Burchell and Mackay, 1998). The downrange damage is due to a decapitated projectile (Burchell and Mackay, 1998;Davison et al, 2011;Suzuki et al, 2021). Differences among the appearances of crater cavities formed at different temperatures are not clear as shown in Figure 6 below, although the patterns extending downrange of the crater are more obvious for those at room temperature.…”

Section: Measurement Resultssupporting

confidence: 59%

“…After impact, the surface profile of the target was measured using a laser profiler installed at ISAS as described previously (Suzuki et al, 2012;2021). In the following, the setups of the experiments with the two-stage hydrogen-gas gun and the powder gun are described.…”

Section: Methodsmentioning

confidence: 99%

“…The long axis of the block was placed in the ballistic direction of the projectile. Details on how to set up the target can be found in Suzuki et al (2021). Table 1 shows the experimental conditions of these oblique impacts.…”

Section: Two-stage Hydrogen-gas Gun Experimentsmentioning

confidence: 99%

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Crater shape as a possible record of the impact environment of metallic bodies: Effects of temperature, impact velocity and impactor density

Ogawa

Nakamura

Suzuki

et al. 2021

Icarus

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Section: Measurement Resultssupporting

confidence: 59%

Section: Methodsmentioning

confidence: 99%

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Crater shape as a possible record of the impact environment of metallic bodies: Effects of temperature, impact velocity and impactor density

Ogawa

Nakamura

Suzuki

et al. 2021

Icarus

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“…The second technique is a standard cratering experiment with a relatively large block. Although the shocked structure deep inside the target can be examined in a fully open system, which is the same geometry as in natural impact events (e.g., Lindgren et al., 2013; Winkler et al., 2018; Ohtani et al., 2022), the highly shocked materials around the impact point are lost due to impact spallation and excavation (e.g., Polanskey & Ahrens, 1990; Suzuki et al., 2021). The first and second methods are time consuming and expensive to carry out.…”

Section: Methodology: Impact Experiments Analyses Of Shocked Samples ...mentioning

confidence: 99%

Shock Recovery With Decaying Compressive Pulses: Shock Effects in Calcite (CaCO₃) Around the Hugoniot Elastic Limit

et al. 2022

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Shock metamorphism of minerals in meteorites provides insights into the ancient Solar System.Calcite is an abundant aqueous alteration mineral in carbonaceous chondrites. Return samples from the asteroids Ryugu and Bennu are expected to contain calcite-group minerals. Although shock metamorphism in silicates has been well studied, such data for aqueous alteration minerals are limited.Here, we investigated the shock effects in calcite with marble using impact experiments at the Planetary Exploration Research Center of Chiba Institute of Technology. We produced decaying compressive pulses with a smaller projectile than the target. A metal container facilitates recovery of a sample that retains its pre-impact stratigraphy. We estimated the peak pressure distributions in the samples with the iSALE shock physics code. The capability of this method to produce shocked grains that have experienced different degrees of metamorphism from a single experiment is an advantage over conventional uniaxial shock recovery experiments. The shocked samples were investigated by polarizing microscopy and X-ray diffraction analysis. We found that more than half of calcite grains exhibit undulatory extinction when peak pressure exceeds 3 GPa. This shock pressure is one order of magnitude higher than the Hugoniot elastic limit (HEL) of marble, but it is close to the HEL of a calcite crystal, suggesting that the undulatory extinction records dislocation-induced plastic deformation in the crystal. Finally, we propose a strategy to re-construct the maximum depth of calcite grains in a meteorite parent body, if shocked calcite grains are identified in chondrites and/or return samples from Ryugu and Bennu.

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“…Although we have assumed in this paper that Itokawa boulders have low porosity, it is important to consider the possibility of boulders with high porosity. However, it is unlikely that the boulders we analyzed are as porous as those in the oblique impact experiment of Suzuki et al (2021) because the pit-halo craters are found on the boulders. In addition, the low porosity of LL chondrites and the Itokawa samples (0-10 % with an average of 1.5 and 1.9 %, respectively) may also support our argument for low porosity (Tanbakouei et al 2019).…”

Section: Crater Size Relation and Spallationmentioning

confidence: 97%

Estimation of the space weathering timescale on (25143) Itokawa: Implications on its rejuvenation process

Jin

Ishiguro

2022

A&A

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Context. The space weathering timescales of near-Earth S-type asteroids have been investigated using several approaches (i.e., experiments, sample analyses, and theoretical approaches), yet there are orders of magnitude differences. Aims. We aim to examine the space weathering timescale on a near-Earth S-type asteroid, Itokawa, using Hayabusa/AMICA images, and further investigate the evolutional process of the asteroid. Methods. We focused on bright mottles on the boulder surfaces generated via impacts with interplanetary dust particles (IDPs). We compared the bright mottle size distribution with an IDP flux model to determine the space weathering timescale. Results. We found that the space weathering timescale on Itokawa's boulder surfaces is 10 3 years (in the range of 10 2 -10 4 years), which is consistent with the timescales of space weathering by light ions from the solar wind. Conclusions. From this result, we conclude that Itokawa's surface has been weathered rapidly in 10 3 years but portions of the surface are exposed due to seismic shaking that was triggered by a recent impact, which created the Kamoi crater

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Experimental study concerning the oblique impact of low- and high-density projectiles on sedimentary rocks

Cited by 6 publications

References 32 publications

Crater shape as a possible record of the impact environment of metallic bodies: Effects of temperature, impact velocity and impactor density

Crater shape as a possible record of the impact environment of metallic bodies: Effects of temperature, impact velocity and impactor density

Shock Recovery With Decaying Compressive Pulses: Shock Effects in Calcite (CaCO₃) Around the Hugoniot Elastic Limit

Estimation of the space weathering timescale on (25143) Itokawa: Implications on its rejuvenation process

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Experimental study concerning the oblique impact of low- and high-density projectiles on sedimentary rocks

Cited by 6 publications

References 32 publications

Crater shape as a possible record of the impact environment of metallic bodies: Effects of temperature, impact velocity and impactor density

Crater shape as a possible record of the impact environment of metallic bodies: Effects of temperature, impact velocity and impactor density

Shock Recovery With Decaying Compressive Pulses: Shock Effects in Calcite (CaCO3) Around the Hugoniot Elastic Limit

Estimation of the space weathering timescale on (25143) Itokawa: Implications on its rejuvenation process

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Shock Recovery With Decaying Compressive Pulses: Shock Effects in Calcite (CaCO₃) Around the Hugoniot Elastic Limit