EP015:
Extraterrestrial Tracers and Materials in Sediments: Techniques, Approaches, and New Discoveries





Session ID#: 22928

Session Description:
Over all of its history, the Earth has accreted extraterrestrial materials, and stored them in a variety of sedimentary deposits. Initially, only bulk sediments were searched for tracers such as Ir, or isotopes of He, Cr, Fe and Os. These tracers have been used to, e.g., establish variations in the influx of extraterrestrial matter, locate ejecta beds from large impacts, and determine impactors types (iron, chondritic, etc.). The last decade has seen significant progress in the identification, recovery and characterization of actual extraterrestrial materials, allowing us to document changes in the interplanetary flux reaching Earth over time, to constrain the origins of meteorites, and study the consequences of extraterrestrial events (e.g., asteroid break-ups or near-by supernovae) for life on Earth. We invite contributions on techniques to identify, extract and study extraterrestrial materials from sediments, as well as new ideas, results and applications which will bring the field forward.
Primary Convener:  Matthias M. M. Meier, ETH Zurich, Zurich, Switzerland
Convener:  Birger Schmitz, Lund University, Department of Physics, Lund, Sweden
Co-Organized with:
Earth and Planetary Surface Processes, and Planetary Sciences

Cross-Listed:
  • P - Planetary Sciences
  • PP - Paleoceanography and Paleoclimatology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1039 Alteration and weathering processes [GEOCHEMISTRY]
2129 Interplanetary dust [INTERPLANETARY PHYSICS]
6205 Asteroids [PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS]
6240 Meteorites and tektites [PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS]

Abstracts Submitted to this Session:

Samuele Boschi1, Birger Schmitz2 and Fredrik Terfelt1, (1)Lund University, Nuclear Physics, Lund, Sweden, (2)Lund University, Department of Physics, Lund, Sweden
Isabel Israde-Alcantara, Universidad Michoacana de San Nicolás de Hidalgo, INSTITUTO DE INVESTIGACIONES EN CIENCIAS DE LA TIERRA, Morelia, Mexico and Gabriela Domínguez-Vazquez, James Bischoff, Allen West, Silvia Gonzalez, David Huddart
Matthias M. M. Meier1, Robert C. J. Steele1, Birger Schmitz2, Laurette Piani3, Colin Maden4, Amy A. Plant1, Maria Schönbächler1 and Henner Busemann1, (1)ETH Zurich, Zurich, Switzerland, (2)Lund University, Department of Physics, Lund, Sweden, (3)CRPG Centre de Recherches Pétrographiques et Géochimiques, Vandoeuvre-Les-Nancy, France, (4)ETH Zurich, Institute of Geochemistry and Petrology, Zurich, Switzerland
Caroline Caplan, University of Hawaii at Manoa, Honolulu, HI, United States, Gary R Huss, University of Hawaii NASA Astrobiology Institute, Hawai’i Institute of Geophysics and Planetology, Honolulu, HI, United States, Birger Schmitz, Lund University, Department of Physics, Lund, Sweden and Kazu Nagashima, University of Hawaii at Manoa, HIGP, Honolulu, HI, United States
Birger Schmitz, Lund University, Department of Physics, Lund, Sweden
Philipp R Heck, Field Museum of Natural History, Chicago, IL, United States, Birger Schmitz, Lund University, Department of Physics, Lund, Sweden and Noriko Kita, UW-Madison, Madison, WI, United States
Kenneth A Farley, California Institute of Technology, Pasadena, CA, United States, Ross Mitchell, Earth Dynamics Research Group, ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and The Institute for Geoscience Research (TIGeR), Department of Applied Geology, Curtin University, Perth, Australia and Alessandro Montanari, Osservatorio Geologico di Coldigioco, 62021 Apiro, Italy
Ellinor Martin, Lund University, Nuclear Physics, Lund, Sweden and Birger Schmitz, Lund University, Department of Physics, Lund, Sweden