Host-rock contamination and sulfide immiscibility in the Franklin large igneous province, Victoria Island, Canada
Bibliographic record
Abstract
Contamination in the intrusive plumbing system of large igneous provinces (LIPs) by country rocks can lead to sulfide immiscibility, which is a vital step in the formation of nickel-copper-platinum group element (PGE) ore deposits.On Victoria Island, arctic Canada, exceptional preservation enables the relationships between sills and dikes of the Neoproterozoic Franklin LIP and their host sedimentary rocks to be studied in detail.We use sulfur isotope values and major and trace elements concentrations of intrusions and host rocks and Fe-Ti oxide oxybarometry of intrusions to evaluate contamination in the Franklin LIP and the effect of contamination on sulfur solubility.There is minimal evidence of host rock contamination in carbonate-and shale-hosted sills.These sills tend to have homogeneous δ 34 S values between +3 and +4‰ (V-CDT, Vienna Canyon Diablo Troilite).We document how sulfur
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".