Maribo-A new CM fall from Denmark

Henning Haack, Thomas Grau, Addi Bischoff, Marian Horstmann, John Wasson, Anton Sørensen, Matthias Laubenstein, Ulrich Ott, Herbert Palme, Marko Gellissen, Richard C. Greenwood, Victoria K. Pearson, Ian A. Franchi, Zelimir Gabelica, Philippe Schmitt-Kopplin

Research output: Article

51 Citations (Scopus)

Abstract

Maribo is a new Danish CM chondrite, which fell on January 17, 2009, at 19:08:28 CET. The fall was observed by many eye witnesses and recorded by a surveillance camera, an all sky camera, a few seismic stations, and by meteor radar observatories in Germany. A single fragment of Maribo with a dry weight of 25.8g was found on March 4, 2009. The coarse-grained components in Maribo include chondrules, fine-grained olivine aggregates, large isolated lithic clasts, metals, and mineral fragments (often olivine), and rare Ca,Al-rich inclusions. The components are typically rimmed by fine-grained dust mantles. The matrix includes abundant dust rimmed fragments of tochilinite with a layered, fishbone-like texture, tochilinite-cronstedtite intergrowths, sulfides, metals, and carbonates often intergrown with tochilinite. The oxygen isotopic composition: (δ 17O=-1.27‰; δ 18O=4.96‰; Δ 17O= -3.85‰) plots at the edge of the CM field, close to the CCAM line. The very low Δ 17O and the presence of unaltered components suggest that Maribo is among the least altered CM chondrites. The bulk chemistry of Maribo is typical of CM chondrites. Trapped noble gases are similar in abundance and isotopic composition to other CM chondrites, stepwise heating data indicating the presence of gas components hosted by presolar diamond and silicon carbide. The organics in Maribo include components also seen in Murchison as well as nitrogen-rich components unique to Maribo.

Original languageEnglish
Pages (from-to)30-50
Number of pages21
JournalMeteoritics and Planetary Science
Volume47
Issue number1
DOIs
Publication statusPublished - jan. 1 2012

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

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    Haack, H., Grau, T., Bischoff, A., Horstmann, M., Wasson, J., Sørensen, A., Laubenstein, M., Ott, U., Palme, H., Gellissen, M., Greenwood, R. C., Pearson, V. K., Franchi, I. A., Gabelica, Z., & Schmitt-Kopplin, P. (2012). Maribo-A new CM fall from Denmark. Meteoritics and Planetary Science, 47(1), 30-50. https://doi.org/10.1111/j.1945-5100.2011.01311.x