Pore size distribution in an uncompacted equilibrated ordinary chondrite

    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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