Abstract
We measured δ13C values of free and sulfur-bound lipids and framboidal pyrite-size distributions in three sediment cores from the southern margins of the Black Sea. The margin cores show a marked difference in the occurrence of biomarkers from green sulfur bacteria compared with the deep-basin cores, as a result of deepening of the chemocline resulting from enhanced mixing and/or decreased light-penetration as a consequence of high turbidity and productivity in shelf waters. Quantitation of biomarkers suggests that photic-zone anoxia along the shelf margin was generally absent during the deposition of unit I, although occurred during the deposition of Unit IIb at two sites.
Original language | English (US) |
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Pages (from-to) | 1525-1531 |
Number of pages | 7 |
Journal | Organic Geochemistry |
Volume | 31 |
Issue number | 12 |
DOIs | |
State | Published - 2000 |
All Science Journal Classification (ASJC) codes
- Geochemistry and Petrology