Other
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989metic..24...89s&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 24, June 1989, p. 89-98.
Other
22
Meteoritic Composition, Neodymium Isotopes, Strontium Isotopes, Tektites, Meteorite Craters, New Jersey, North America, Earth, Neodymium, Strontium, Isotopes, Tektites, Samples, Terrestrial, Origin, Major Elements, Physical Properties, Isotopic Ratios, Formation, Parent Material, Age, Impacts, Laboratory Studies, Photographs, Source, Procedure, Maps, Enrichment
Scientific paper
The Sr and Nd isotopic composition was analyzed for samples from the Late Eocene tektite material from DSDP site 612 off the New Jersey coast, to determine whether these tektites may be assigned to the North-American-tektite group. It was found that the ranges of the Sr-87/Sr-86 and the Nd-143/Nd-144 ratios were much wider than in the 612-tectite material than in the tightly constrained group of North American tektites and microtektites and were significantly different from ratios in other groups of tektites. Results indicate that the DSDP tektites were formed from a chemically and isotopically heterogeneous material, in a regime that was different from that of other groups of tektites. It is suggested that the 612-tectites and the North American tektites were either formed by impacts of several bolides in the same general area or by a single impact event that sampled different layers.
Ngo Henry
Papanastassiou Dimitri Anastassios
Stecher Ole
Wasserburg Gerald J.
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