TY - JOUR
T1 - Maribo—a new CM fall from Denmark
AU - Haack, Henning
AU - Grau, Thomas
AU - Bischoff, Addi
AU - Horstmann, Marian
AU - Wasson, John
AU - Sørensen, Anton Norup
AU - Laubenstein, Matthias
AU - Ott, Ulrich
AU - Palme, Herbert
AU - Gellissen, Marko
AU - Greenwood, Richard C.
AU - Pearson, Victoria K.
AU - Franchi, Ian A.
AU - Gabelica, Zelimir
AU - Schmitt-Koplin, Philippe
PY - 2012/1
Y1 - 2012/1
N2 - 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.
AB - 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.
U2 - 10.1111/j.1945-5100.2011.01311.x
DO - 10.1111/j.1945-5100.2011.01311.x
M3 - Journal article
SN - 1086-9379
VL - 47
SP - 30
EP - 50
JO - Meteoritics and Planetary Science
JF - Meteoritics and Planetary Science
IS - 1
ER -