The fall, recovery, classification, and initial characterization of the Hamburg, Michigan H4 chondrite
Year: 2020
Type: article
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, 21Ne, and 38Ar are ~12 Ma, and roughly agree with each other. Noble gas data as well as the cosmogenic 10Be concentration point to a small 40–60 cm diameter meteoroid. An 40Ar‐39Ar 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.
DOI: 10.1111/maps.13584
Authors: Philipp R. Heck, Jennika Greer, Joseph S. Boesenberg, Audrey Bouvier, Marc W. Caffee, William S. Cassata, Catherine Corrigan, Andrew M. Davis, Donald W. Davis, Marc Fries, Mike Hankey, Peter Jenniskens, Philippe Schmitt‐Kopplin, Shannon Sheu, Reto Trappitsch, Michael Velbel, Brandon Weller, Kees Welten, Qing‐Zhu Yin, Matthew E. Sanborn, Karen Ziegler, Douglas Rowland, Kenneth L. Verosub, Qin Zhou, Yu Liu, Guoqiang Tang, Qiuli Li, Xianhua Li, Zoltan Zajacz
Institutions: Field Museum of Natural History, University of Chicago, Brown University, Western University, University of Bayreuth, Purdue University West Lafayette, Lawrence Livermore National Laboratory, Smithsonian Institution, National Museum of Natural History, University of Toronto, National Aeronautics and Space Administration, Johnson Space Center, Ames Research Center, Search for Extraterrestrial Intelligence, Helmholtz Munich, Michigan State University, Albany Medical College, Space Sciences Laboratory, University of California, Berkeley, University of California, Davis, University of New Mexico, Chinese Academy of Sciences, National Astronomical Observatories, Institute of Geology and Geophysics, State Key Laboratory of Lithospheric Evolution
Language: English
Topic: Astro and Planetary Science
Subfield: Space and Planetary Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,900
Funders: National Science Foundation, Smithsonian Institution, U.S. Department of Energy, National Aeronautics and Space Administration, Silicon Valley Community Foundation, Tawani Foundation, Field Museum, Chan Zuckerberg Initiative, Canada Research Chairs, Nuclear Safety and Security Commission, Natural Sciences and Engineering Research Council of Canada, Laboratory Directed Research and Development, Lawrence Livermore National Laboratory
Awards: G1088636562, G1356433355, G14554683, SCIENTIFIC GOAL AND OBJECTIVES: THE SCIENTIFIC OBJECTIVE OF THIS OBSERVING PROGRAM IS TO CHARACTERIZE THE MATERIAL PROPERTIES OF NEAR EARTH OBJECTS (NEO) AND THE MAIN BELT ASTEROID FAMILIES THAT THEY TRACE BACK TO. THE GOAL IS TO DEVELOP THE TECHNOLOGY NEEDED TO GREATLY SCALE UP THE MEASUREMENT OF PRE-ATMOSPHERIC ORBITS OF METEORITE FALLS. THE RESULTING ORBITAL ELEMENTS FOR DIFFERENT METEORITE TYPES WILL BE COMPARED TO DYNAMICAL MODELS OF THE ORBITAL EVOLUTION OF SMALL (10-300 CM SIZED) ASTEROIDS FROM MAIN BELT TO NEO ORBITS IN ORDER TO STATISTICALLY DETERMINE THE LIKELIHOOD THAT A METEORITE ORIGINATES FROM A GIVEN ASTEROID FAMILY. METHODS: A SIGNIFICANT NUMBER OF DESERT FIREBALL NETWORK CAMERAS ARE AVAILABLE FOR DEPLOYMENT IN THE ARID REGIONS OF THE UNITED STATES FROM THE AUSTRALIAN PARTNER OF NASA'S SERVII PROGRAM. THESE ARE MODIFIED DIGITAL STILL CAMERAS WITH ALL-SKY OBJECTIVES AND A LIQUID CRYSTAL SHUTTER THAT HAVE PROVEN TO GENERATE SUPERIOR FIREBALL TRAJECTORIES AND ORBITS. SUPPORT IS REQUESTED TO DEPLOY AND MANAGE THIS NETWORK IN THE UNITED STATES. IN ORDER TO GREATLY SCALE UP THE RECOVERY OF METEORITES FROM SUCH NETWORKS CAMERA SYSTEMS WILL BE DEVELOPED AND DESIGNED TO FUNCTION IN ASSOCIATION WITH THE DESERT FIREBALL NETWORK CAMERAS THAT CAN TRACK THE FIREBALL FRAGMENTS TO THE GROUND AND HELP FIND METEORITES IN THE LOCAL TERRAIN. SPECIFICALLY A TELESCOPIC CAMERA SYSTEM WILL BE DEVELOPED THAT RAPIDLY SLEWS TO THE METEOR AND RECORDS BOTH STAR BACKGROUND AND METEOR FRAGMENTS AT HIGH FRAME RATE. THAT DATA WILL BE TRIANGULATED AND METEORITE IMPACT LOCATIONS ON THE GROUND CALCULATED. THE TECHNOLOGY FOR FINDING METEORITES USING DRONES EQUIPPED WITH DEEP-LEARNING ALGORITHMS WILL BE FURTHER DEVELOPED. RELEVANCE: THE PROPOSED WORK IS TO CONDUCT A PROGRAM OF GROUND-BASED ASTRONOMICAL OBSERVATIONS THAT CONTRIBUTES TO UNDERSTANDING THE NATURE AND EVOLUTION OF SMALL 0.1-3M SIZED NEAR EARTH OBJECTS. THE PROPOSED WORK IS THE MOST DIRECT APPROACH POSSIBLE SHORT OF SAMPLE RETURN FROM KNOWN ASTEROIDS TO IDENTIFY WHAT METEORITES SAMPLE NEAR EARTH OBJECTS THAT EVOLVED FROM THE SAME SOURCE REGIONS., G2145270357, G2717806384, G4343739756, G4401703637, G4612008882, G4744367074, G4744444288, Graduate Research Fellowship Program (GRFP), G6143048551, ESTABLISHING PLANETARY GENEALOGY OF EMERGING WORLDS WE PROPOSE TO EXPAND OUR INVESTIGATION INTO A WIDER RANGE OF PLANETARY MATERIALS (E.G., IRON METE, G6592377389, G6672310739, G69709960, G7138489652, Graduate Research Fellowship Program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
OpenAlex ID: W3096764992