Data for: 40Ar-39Ar step heating ages of North American tektites and of two impact melt rock samples from the Chesapeake Bay impact structure

Published: 24 March 2020| Version 1 | DOI: 10.17632/7vzysmh5j8.1
Contributor:
Vera Assis Fernandes

Description

Table A1 Summary of literature age data for NA Tektites and the Chesapeake Bay impact structure obtained using different analytical techniques: biostratigraphy, fission-track, 40Ar/39Ar total fusion and step heating, K/Ar and U/Pb. Where possible, sample ages have been corrected using the Steiger and Jäger (1977) decay constants and consistent monitor ages (Schwarz and Trieloff, 2007). Table A2 Chemical composition for a profile along a bediasite obtained by electron microprobe (in wt%). Table A3 Chemical composition for a profile along a georgiaite obtained by electron microprobe (in wt%). Appendix tables A4-A20 display measured argon isotopes corrected for mass discrimination, sensitivity, system blanks, decay and relative neutron doses. All isotopes are also corrected for interfering isotopes produced on K and Ca during irradiation.

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Geology, Stratigraphy, Geochronology, Terrestrial Paleoenvironments

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