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Heck, P.R.* ; Greer, J.* ; Boesenberg, J.S.* ; Bouvier, A.* ; Caffee, M.W.* ; Cassata, W.S.* ; Corrigan, C.* ; Davis, A.M.* ; Davis, D.W.* ; Fries, M.* ; Hankey, M.* ; Jenniskens, P.* ; Schmitt-Kopplin, P. ; Sheu, S.* ; Trappitsch, R.* ; Velbel, M.* ; Weller, B.* ; Welten, K.* ; Yin, Q.Z.* ; Sanborn, M.E.* ; Ziegler, K.* ; Rowland, D.* ; Verosub, K.L.* ; Zhou, Q.* ; Liu, Y.* ; Tang, G.* ; Li, Q.* ; Li, X.* ; Zajacz, Z.*

The fall, recovery, classification, and initial characterization of the Hamburg, Michigan H4 chondrite.

Meteorit. Planet. Sci. 55, 2341-2359 (2020)
Verlagsversion Forschungsdaten DOI
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
The Hamburg meteorite fell on January 16, 2018, near Hamburg, Michigan, after a fireball event widely observed in the U.S. Midwest and in Ontario, Canada. Several fragments fell onto frozen surfaces of lakes and, thanks to weather radar data, were recovered days after the fall. The studied rock fragments show no or little signs of terrestrial weathering. Here, we present the initial results from an international consortium study to describe the fall, characterize the meteorite, and probe the collision history of Hamburg. About 1 kg of recovered meteorites was initially reported. Petrology, mineral chemistry, trace element and organic chemistry, and O and Cr isotopic compositions are characteristic of H4 chondrites. Cosmic ray exposure ages based on cosmogenic He-3, Ne-21, and Ar-38 are similar to 12 Ma, and roughly agree with each other. Noble gas data as well as the cosmogenic Be-10 concentration point to a small 40-60 cm diameter meteoroid. An Ar-40-Ar-39 age of 4532 +/- 24 Ma indicates no major impact event occurring later in its evolutionary history, consistent with data of other H4 chondrites. Microanalyses of phosphates with LA-ICPMS give an average Pb-Pb age of 4549 +/- 36 Ma. This is in good agreement with the average SIMS Pb-Pb phosphate age of 4535.3 +/- 9.5 Ma and U-Pb Concordia age of 4535 +/- 10 Ma. The weighted average age of 4541.6 +/- 9.5 Ma reflects the metamorphic phosphate crystallization age after parent body formation in the early solar system.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Oxygen-isotope; Parent Body; Elemental Compositions; Stony Meteorites; Constraints; Phosphates; History; Impact; Disruption; Accretion
ISSN (print) / ISBN 1086-9379
e-ISSN 1945-5100
Quellenangaben Band: 55, Heft: 11, Seiten: 2341-2359 Artikelnummer: , Supplement: ,
Verlag University of Arizona, Department of Geosciences
Verlagsort 111 River St, Hoboken 07030-5774, Nj Usa
Begutachtungsstatus Peer reviewed
Förderungen Chan Zuckerberg Initiative DAF, an advised fund of Silicon Valley Community Foundation
U.S. Department of Energy by Lawrence Livermore National Laboratory
LLNL-LDRD Program
NSERC Discovery Grant
Canada Research Chair programs
National Science Foundation Graduate Research Fellowship
National Aeronautics and Space Administration
TAWANI Foundation