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

ABSTRACT: 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 ³He, ²¹N

SUBMITTER: Heck PR 

PROVIDER: S-EPMC7820957 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature