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oa Sequestration of Extended Cheilanthanes up to C45 through Natural Sulfurization
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, IMOG 2025, Sep 2025, Volume 2025, p.1 - 2
Abstract
Summary
While the precursors of short chain cheilanthanes have been proposed, the biological sources of extended cheilanthanes (>C30) remain unidentified. Here, we report detection of both short and extended cheilanthanes in sediment extracts from lakes and marine upwelling systems. Upon the Raney nickel desulfurization, an array of cheilanthane homologs up to C45 were released in both modern sediments and geological records. Importantly, the recognition of sulfurized extended cheilanthanes in the geological record and some modern analogues demonstrates that their biological sources continue to exist and can ultimately be identified.
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