Ontology highlight
ABSTRACT:
SUBMITTER: Hodgskiss MSW
PROVIDER: S-EPMC6717284 | biostudies-literature | 2019 Aug
REPOSITORIES: biostudies-literature
Hodgskiss Malcolm S W MSW Crockford Peter W PW Peng Yongbo Y Wing Boswell A BA Horner Tristan J TJ
Proceedings of the National Academy of Sciences of the United States of America 20190812 35
It has been hypothesized that the overall size of-or efficiency of carbon export from-the biosphere decreased at the end of the Great Oxidation Event (GOE) (ca. 2,400 to 2,050 Ma). However, the timing, tempo, and trigger for this decrease remain poorly constrained. Here we test this hypothesis by studying the isotope geochemistry of sulfate minerals from the Belcher Group, in subarctic Canada. Using insights from sulfur and barium isotope measurements, combined with radiometric ages from bracket ...[more]