New insight into chert history from silica mineral phase transformation and (Si and O) isotope and trace element criterion constraints on the origin of chert
Bibliographic record
Abstract
Major and minor element, TOC contents (wt.%; Supplementary Data S1), trace element and REEs concentrations (mg/kg; Supplementary Data S2). Various chert types from representative sedimentary profiles of Paleozoic, Proterozoic and Archean, invoking volcanic, S-, C- (seawater, hydrothermal), dike chert types and their Si and O isotopie and trace elements datasets (Supplementary Data S3), and Si and O in-situ isotopic datasets for representative microquartz and quartz vein of the 1.88 Ga Gunflint (Canada), 2.72 Ga Tumbiana Formation (Australia), 3.29 Ga Mendon Formation (South Africa), and 3.48 Ga Dresser Formation (Australia) chert (Supplementary Data S4). Si isotope fractionation in opal-CT dissolves and reprecipitates to microquartz process in pore water (Supplementary Data S5), and O isotope-calculated paleo-temperatures (Supplementary Data S6) are shown for the early Silurian C-chert (seawater chert) sample from the Yangtze block, South China, Proterozoic-Cambrian transition C-chert from the Bohemian Massif, Czech Republic, and 1.9 Ga Gunflint chert, Canada.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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 teacher head, 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".