Tracking redox reactions in Saanich Inlet from the water column to early diagenetic pyrite formation
Bibliographic record
Abstract
Geochemical proxies used widely to reconstruct global paleodepositional systems require further calibration and validation in a wider range of oxygen-poor settings. The redox threshold values associated with various proxies (e.g., Fespeciation, trace-metal enrichments) can vary considerably among depositional systems and, for this reason, geochemical proxies should be scrutinized in multiple modern depositional systems of diverse redox characteristics-both stable and dynamic. Here, we provide a detailed study of Saanich Inlet, a semi-restricted fjord-like basin noted for high-frequency redox variation. Bottom water and sediment samples were collected in July 2019 when complete anoxia developed below 130 m water depth. We present data from the seasonally anoxic basin (200 m) and the oxygenated margin (100 m) to compare how spatiotemporal variations in redox condition impact the cycling of iron, sulfur, and trace metals in the bottom waters as recorded in bulk sediments, porewaters, and pyrite.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".