Archean mafic volcanism of the Eastern Ungava peninsula, Northern Quebec
Bibliographic record
Abstract
Mafic volcanic sequences of tholeiitic basalt and associated komatiite are common to many Precambrian shields of the world. Recently discovered remnants of Archean greenstone belts in the northern Superior Province of Canada exhibit characteristics similar to larger belts of the southern Superior Province. Three of the best preserved belts are trapped in ca. 2.77--2.88 Ga tonalitic intrusives of the Faribault-Thury amphibolitic Complex (FTC), and provide direct evidence for the nature of the mantle prior to the major volcanic events of the late Archean (ca. 2.7 Ga). These belts consist of amphibolite facies rocks of volcanic and sedimentary origin, in one of which a wide variety of cumulates are preserved. The association of the lavas with meta-pelites, iron formations, marbles, and the lack of conglomerate and clearly crustally contaminated lavas suggest that the FTC lavas were erupted in an oceanic environment. The three belts are separated by over 100 km, but exhibit similar chemical characteristics and may represent the base of an extensive early mafic crust. (Abstract shortened by UMI.)
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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 | 0.002 |
| Science and technology studies | 0.002 | 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) | 0.020 | 0.001 |
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".