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

Y1 - 2012

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 25.8 g 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: (d17O =-1.27 ‰; d18O = 4.96 ‰; ¿17O = -3.85 ‰) plots at the edge of the CM field, close to the CCAM line. The very low ¿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 25.8 g 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: (d17O =-1.27 ‰; d18O = 4.96 ‰; ¿17O = -3.85 ‰) plots at the edge of the CM field, close to the CCAM line. The very low ¿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

VL - 47

SP - 30

EP - 50

JO - Meteoritics and Planetary Science

JF - Meteoritics and Planetary Science

SN - 1086-9379

IS - 1

ER -