Paleoproterozoic Large Igneous Province Record of the Peräpohja Belt, Northern Finland
Bibliographic record
Abstract
The Peräpohja Schist Belt, northern Finland, represents an intercontinental rifting sequence from 2.45-1.98 Ga, in which new geochemical data was collected. Throughout this period, several large igneous provinces (LIP’s) were emplaced, which progressed from mixed melts dominated by an early lithospheric mantle source to later more depleted mantle sources. Volcanic units are geochemically heterogeneous due to differing melting depths and partial melting degrees between flows, while intrusive units are generally homogeneous. The Unmapped Unit can be geochemically linked to the Koli Sill. The volcanics of the >2.08 Ga Väystäjä Formation can be linked to the 2.07 Ga Fort Frances dykes in Superior. Although the 2.44-2.22 Ga Runkaus Formation cannot be directly chemically linked to the 2.45 Ga Thessalon Formation, they are potentially members of the same LIP event. While most of these LIP’s are not prospective for chalcophile element mineralization, the Koli Sill is a potentially attractive target for exploration.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".