Publication Date:
2012-08-23
Description:
We systematically conducted impact cratering experiments with sedimentary rocks at 0.8–7.1 km/s using various projectiles with 1.1–15 g/cm3 in density. The crater diameter, depth, and volume are investigated and compared with the results for igneous rocks. Then, using the non-dimensional parameters, the normalized crater diameter πD, the normalized depth πd, the normalized volume πV, the target strength per specific energy π3, and the target and projectile density ratio π4, the scaling laws, πD = (1.43 ± 0.25)π3−0.22±0.02 π40.11±0.07, πd = (0.22 ± 0.04)π3−0.25±0.02 π40.01±0.05, and πV = (0.11 ± 0.04) π3−0.71±0.05 π40.23±0.17, are obtained. The comparison with the results of igneous rocks suggests that the characteristic properties of sedimentary rocks such as the lower strength and the strong shock wave attenuation rate are actually effective for the cratering of sedimentary rocks.
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics
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