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Impact Jetting of Geological Materials

Yang, Wenbo and Ahrens, Thomas J. (1995) Impact Jetting of Geological Materials. Icarus, 116 (2). pp. 269-274. ISSN 0019-1035. doi:10.1006/icar.1995.1125. https://resolver.caltech.edu/CaltechAUTHORS:20141027-154816617

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Abstract

To understand jetting of earth materials, gabbro slabs (5 mm thick) were accelerated to 1.5-2 km sec^(-1) and impacted gabbro (5-10 mm thick), novaculite (10 mm thick), and porous sandstone (12 mm thick) targets at inclination angles of 30°-60°. The ejecta were collected using a catcher box filled with styrofoam and the particles are extracted using chloroform. Jetting angles are determined by the relative positions of the target and the crater produced by the ejecta. The mass of the ejected particles per unit area (∼50 mg cm^(-2)) of the impactor remains almost independent of the impact velocity, inclination angle, thickness of the target and sample mineralogy, and density. Hydrodynamic models are used to calculate the jetting mass, angle, and velocity. Theoretical models predict ∼6 times more ejecta than the experimentally measured as the inclination angle increases. X-ray diffraction of the recovered ejecta shows that it is still in crystalline form, which agrees with thermodynamic calculations. Because the experimental results indicate that the theoretical jetting model for thin metal plates provides a poor description of the experiments, the application of metal plate theory to planet-sized objects appears to be questionable.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1006/icar.1995.1125DOIAritcle
http://www.sciencedirect.com/science/article/pii/S0019103585711256PublisherArticle
Additional Information:© 1995 Academic Press. Received May 23, 1994: revised March 17, 1995. Research is supported by NASA under NAGW 1941, Division of Geological and Planetary Sciences, Contribution 5399.
Funders:
Funding AgencyGrant Number
NASANAGW 1941
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences5399
Issue or Number:2
DOI:10.1006/icar.1995.1125
Record Number:CaltechAUTHORS:20141027-154816617
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141027-154816617
Official Citation:Yang, W., & Ahrens, T. J. (1995). Impact Jetting of Geological Materials. Icarus, 116(2), 269-274. doi: http://dx.doi.org/10.1006/icar.1995.1125
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50887
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:28 Oct 2014 16:31
Last Modified:10 Nov 2021 19:02

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