Ni-Cu-PGE Metallogenesis of Komatiitic Rocks in the Abitibi Greenstone Belt, Canada
Bibliographic record
Abstract
All komatiitic rocks in the 2.7 Ga Abitibi greenstone belt, Canada contain similar PGE abundances, regardless of age, depth of melting, and/or residue composition. Furthermore, all komatiitic rocks in the Abitibi greenstone belt appear to have been initially sulfide undersaturated and show only local evidence of sulfide segregation, consistent with sulfide saturation during lava emplacement and/or crystallization. Ni-Cu-(PGE) mineralization in the Abitibi greenstone belt has been found only in the two oldest assemblages, the Kidd-Munro and Tisdale assemblages. Only these assemblages contain lava channels or channelized sheet flows and sulfide-bearing sediments. Thus, physical volcanology is more important than magma composition in determining the prospectivity of komatiitic rocks in the Abitibi greenstone belt and elsewhere.
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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 | 0.003 | 0.003 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".