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 distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 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 teacher head, 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".