Title

Density, porosity, and magnetic susceptibility of carbonaceous chondrites

Authors

Authors

R. J. Macke; G. J. Consolmagno;D. T. Britt

Comments

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Abbreviated Journal Title

Meteorit. Planet. Sci.

Keywords

COMPOSITIONAL CLASSIFICATION; CV3 CHONDRITES; METEORITES; ABUNDANCES; PETROLOGY; SOLAR; Geochemistry & Geophysics

Abstract

We report physical properties (bulk and grain density, magnetic susceptibility, and porosity) measured using nondestructive and noncontaminating methods for 195 stones from 63 carbonaceous chondrites. Grain densities over the whole population average 3.44 g cm-3, ranging from 2.42 g cm-3 (CI1 Orgueil) to 5.66 g cm-3 (CB Bencubbin). Magnetic susceptibilities (in log units of 10-9 m3 kg-1) averaged log ? = 4.22, ranging from 3.23 (CV3 Axtell) to 5.79 (CB Bencubbin). Porosities averaged 17%, ranging from 0 (for a number of meteorites) to 41% (for one stone of the CO Ornans). Notably, we found significant differences in porosity between the oxidized and reduced CV subgroups, with the porosities of CVo averaging approximately 20% and CVr porosities approximately 4%. Overall, porosities of carbonaceous chondrite falls trend with petrographic type, from type 1 (CI) near 35%, type 2 (CM, CR) averaging 23%, type 3 (CV, CO) 21%, to type 4 (CK and some CO) averaging 15%. There is also a significant decrease in porosity between meteorites of shock stage S1 and those of S2, indicative of shock compression.

Journal Title

Meteoritics & Planetary Science

Volume

46

Issue/Number

12

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

1842

Last Page

1862

WOS Identifier

WOS:000298094600005

ISSN

1086-9379

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