Isotopic compositions of oxygen, iron, chromium, and nickel in cosmic spherules: Toward a better comprehension of atmospheric entry heating effects

• Published in: Geochimica et cosmochimica acta Vol. 69; no. 22; pp. 5365 - 5385
• Main Authors: Engrand, Cécile, McKeegan, Kevin D., Leshin, Laurie A., Herzog, Gregory F., Schnabel, Christoph, Nyquist, Laurence E., Brownlee, Donald E.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.11.2005

Large, correlated, mass-dependent enrichments in the heavier isotopes of O, Cr, Fe, and Ni are observed in type-I (metal/metal oxide) cosmic spherules collected from the deep sea. Limited intraparticle variability of oxygen isotope abundances, typically <5‰ in δ 18O, indicates good mixing of the...