Skip to main content

Non-detection of C-60 fullerene at two mass extinction horizons

Article

Publications

Complete Citation

  • Carrasquillo, Anthony J., Cao, Changqun, Erwin, Douglas H., and Summons, Roger E. 2016. "Non-detection of C-60 fullerene at two mass extinction horizons." Geochimica et Cosmochimica Acta, 176 18–25. https://doi.org/10.1016/j.gca.2015.12.017.

Overview

Abstract

  • Fullerene (C-60) have been reported in a number of geologic samples and, in some cases, attributed to carbonaceous materials delivered during bolide impact events. The extraction and detection of (C60) poses significant analytical challenges, and some studies have been called into question due to the possibility of C-60 forming in situ. Here, we extracted samples taken from the Permian-Triassic boundary section in Meishan, South China and the Cretaceous-Paleogene boundary exposed at Stevns Klint, Denmark, and analyzed the residues using a fast and reliable method for quantifying C-60. Extraction of both whole rock and completely demineralized samples were completed under conditions that previously yielded C-60 as well as using an optimized approach based on recent literature reports. These extracts were analyzed using mass spectrometry with the soft-ionization techniques, atmospheric pressure chemical ionization (APCI) and electrospray ionization (ESI), which have not been shown to form fullerenes in-situ. In no case were we able to detect C-60, nor could we corroborate previous reports of its occurrence in these sediments, thereby challenging the utility of fullerene as a proxy for bolide impacts or mass extinction events. (C) 2015 Elsevier Ltd. All rights reserved.

Publication Date

  • 2016

Authors