Possible glendonite mineral pseudomorphs after the end-Permian extinction
Author Information
Author(s): Musaab M.S.A. Al-Sarmi, Rachel Wood
Primary Institution: University of Edinburgh
Hypothesis
Are the small calcite aggregates found in the Arabian Plateau, Oman, glendonites formed in the aftermath of the end-Permian mass extinction?
Conclusion
The study suggests that the observed pseudomorphs likely formed due to elevated alkalinity and pH conditions in the ocean after the end-Permian extinction.
Supporting Evidence
- The pseudomorphs were found in marine carbonate sediments associated with the end-Permian mass extinction.
- Stable isotope analysis indicates that oceanic dissolved inorganic carbon was the primary carbon source for the pseudomorphs.
- The study suggests that the formation of these pseudomorphs was likely influenced by elevated pH and alkalinity conditions.
Takeaway
Scientists found tiny crystals in Oman that might be a type of mineral called glendonite, which usually forms in cold water. They think these crystals formed after a big extinction event a long time ago.
Methodology
The study involved examining polished thin sections under optical and cathodoluminescence microscopy, as well as scanning electron microscopy for detailed analysis.
Limitations
The small size of the crystals compared to larger examples in the geological record may indicate a sampling bias.
Digital Object Identifier (DOI)
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