Multiple episodes of extensive marine anoxia linked to global warming and continental weathering following the latest Permian mass extinction.

ABSTRACT: Explaining the ~5-million-year delay in marine biotic recovery following the latest Permian mass extinction, the largest biotic crisis of the Phanerozoic, is a fundamental challenge for both geological and biological sciences. Ocean redox perturbations may have played a critical role in this delayed recovery. However, the lack of quantitative constraints on the details of Early Triassic oceanic anoxia (for example, time, duration, and extent) leaves the links between oceanic conditions and the delayed biotic recovery ambiguous. We report high-resolution U-isotope (δ²³⁸U) data from carbonates of the uppermost Permian to lowermost Middle Triassic Zal section (Iran) to characterize the timing and global extent of ocean redox variation during the Early Triassic. Our δ²³⁸U

SUBMITTER: Zhang F 

PROVIDER: S-EPMC5895439 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature