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Chronology of martian breccia NWA 7034 and the formation of the martian crustal dichotomy

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Figure

Fig. 1. Chronometric ages and the history of NWA 7034. (Sm-Nd data are from Nyquistminimum ages obtained from a given method plus or minus the associated 2A) Summary of NWA 7034 radiometric ages
Fig. 2. excluded from isochron regressions. Error ellipses reflect the uncertainty correlation and ±240Ar/39Ar isochron diagrams
Fig. 3. spectrum is plotted against the cumulative release fraction of40Ar/39Ar age spectra
Table 2. U-Pu/Xe ages. Age uncertainties include uncertainties on [Nd],[U], [136Xe], Solar System initial Pu/U and Pu/Nd ratios, 136Xe cumulativeyields, branching ratios, and 238U and 244Pu decay constants.
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