^1,2Dominik C. Hezel,³Knut Metzler,⁴Mara Hochstein
Meteoritics & Plantary Science (in Press) Open Access Link to Article [https://doi.org/10.1111/maps.14336]
¹Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
²Department of Mineralogy, Natural History Museum, London, UK
³Institut für Planetologie, University of Münster, Münster, Germany
⁴Department of Geology and Mineralogy, University of Cologne, Köln, Germany
Published by arrangement with John Wiley & Sons

Chondrule size–frequency distributions provide important information to understand the origin of chondrules. Size–frequency distributions are often obtained as apparent 2-D size–frequency distributions in thin sections, as determining a 3-D size–frequency distribution is notoriously difficult. The relationship between a 2-D size–frequency distribution and its corresponding 3-D size–frequency distribution has been previously modeled; however, the results contradict measured results. Models so far predict a higher mean of the 2-D size–frequency distribution than the corresponding mean of the 3-D size–frequency distribution, while the measurements of real chondrule populations show the opposite. Here, we use a new model approach that agrees with these measurements and at the same time offers a solution, why models so far predicted the opposite. Our new model provides a tool with which the 3-D chondrule size–frequency distribution can be determined from the fit of a measured 2-D chondrule size–frequency distribution.