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Oblique impact jetting of geological materials

Yang, Wenbo and Ahrens, Thomas J. (1994) Oblique impact jetting of geological materials. In: High-pressure science and technology, 1993. AIP Conference Proceedings. No.309. American Institute of Physics , Melville, NY, pp. 835-838. ISBN 1-56396-219-5.

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To understand jetting of earth materials, gabbro slabs (5 mm thick) were accelerated to 1.5–2 km/s and impacted inclined gabbro (5–10 mm thick), novaculite (10 mm thick) and porous sandstone (12 mm thick) targets at angles of 30°–60°. The ejecta were collected using a catcher box filled with styrofoam and the particles were extracted using chloroform. The mass of the ejected particles per unit area (∼50 mg/cm^2) remains almost independent of impact velocity, inclination angle, thickness of the target and sample mineralogy and density. Based on this result, we predict that a 500 m diameter asteroid will produce only ∼10^7 gm tektite material. This is negligible comparing to an estimated 2×10^(13) gm in the Ivory Coast tektite strewn field. The recovered ejecta, unlike most tektites, contains both target and impactor materials. Both of the above results suggest that the tektites are not produced by jetting.

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Additional Information:© 1994 American Institute of Physics. Published online 10 July 1994. This research is supported by NASA under NAGW 1941. Division of Geological and Planetary Sciences Contribution # 5326.
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Caltech Division of Geological and Planetary Sciences5326
Series Name:AIP Conference Proceedings
Issue or Number:309
Record Number:CaltechAUTHORS:20141022-135113329
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Official Citation:Oblique impact jetting of geological materials Wenbo Yang and Thomas J. Ahrens AIP Conf. Proc. 309, 835 (1994);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50691
Deposited By: Ruth Sustaita
Deposited On:22 Oct 2014 21:38
Last Modified:03 Oct 2019 07:25

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