Title

Pore size distribution in an uncompacted equilibrated ordinary chondrite

Authors

Authors

J. M. Friedrich; R. J. Macke; D. P. Wignarajah; M. L. Rivers; D. T. Britt;D. S. Ebel

Comments

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Abbreviated Journal Title

Planet Space Sci.

Keywords

X-ray microtomography; porosity; density; ordinary chondrite; asteroid; COLLISIONAL DISRUPTION; POROSITY; IMPACT; METEORITES; CHROMITE; STONY; Astronomy & Astrophysics

Abstract

The extraordinarily uncompacted nature of the ordinary L chondrite fall Baszkowka gives a unique opportunity to investigate the potentially pre-compaction pore size distribution in an equilibrated ordinary chondrite. Using X-ray microtomography and helium pycnometry on two samples of Baszkowka, we have found that on average, two-thirds of the 19.0% porosity resides in inter-and intra-granular voids with volumes between similar to 3 x 10(-5) and 3 mm(.)(3) We show the cumulative number density of pore volumes observable by X-ray microtomography obeys a power law distribution function in this equilibrated ordinary chondrite. We foresee these data adding to our understanding of the impact processing of chondrites and their parent asteroids, where porosity and pore size play significant roles in the parameterization of impact events. (c) 2008 Elsevier Ltd. All rights reserved.

Journal Title

Planetary and Space Science

Volume

56

Issue/Number

7

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

895

Last Page

900

WOS Identifier

WOS:000256827100003

ISSN

0032-0633

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