A preliminary stratigraphic and structural geology framework for the Archean Mary River Group, northern Baffin Island, Nunavut
Bibliographic record
Abstract
New mapping (parts of NTS 37 G) has established a preliminary stratigraphic and structural framework for the supracrustal rocks of the Archean Mary River Group on northern Baffin Island. The supracrustal sequence consists of psammite, amphibolite, Algoma-type iron formation, quartzite, dacite, and komatiite. Four generations of structures are recognized. Strongly developed bedding-parallel S1 foliations are transposed and folded by northwest-vergent, reclined F2 folds. Moderately south-plunging L2 lineations are coaxial with F2 fold hinges. Superposition of east-trending, steeply north-dipping F3 folds on F2 in the southern map area results in 'mushroom' interference patterns, whereas in the west-central area, F2 and F3 are nearly coaxial, producing Type 3 interference patterns. Northwest- and northeast-trending conjugate kink and chevron-style folds are attributed to D4. Newly identified economic mineral prospects include sulphidized (up to 30% pyrite+/chalcopyrite+/-arsenopyrite) iron formation, and disseminated and fracturefilling sulphides in ultramafic intrusions.
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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 | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.010 | 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".