The First‐Order Crustal Structure and Basin Architecture of the Canadian Arctic Margin
Bibliographic record
Abstract
Abstract First‐order sedimentary isopach and depth‐to‐Moho maps have been produced for the first time along the Canadian Arctic margin from legacy seismic profiles, calibrated with two‐dimensional gravity and magnetic modeling and augmented by some younger passive seismic and exploration seismic data. These maps show margin‐scale structural patterns that can be interpreted in terms of fundamental tectonic processes of lithosphere deformation. The Canadian Arctic margin from the Beaufort Sea to Sever Spur, but not beyond it, is a typical passive continental margin along the Canada Basin ocean. However, beyond Sever Spur through to the Lincoln Shelf, the margin comprises a narrow linear sedimentary basin overlying an axis of crustal thinning embedded within continental lithosphere. This basin formed by intracontinental (trans)extension at least in part after the main HALIP magmatic events that helped build Alpha Ridge on its northern margin. This segment of the margin has a tectonic affinity more facing the Late Cretaceous and Cenozoic North Atlantic‐Baffin Bay‐Arctic extensional regime rather than the earlier Canada Basin extensional regime. These interpretations, which together provide a “Canadian” boundary condition on models of Amerasia Basin origin and evolution, are clearly speculative given the resolution of the available geophysical data. They are presented here, nevertheless, accompanied by a thorough overview of pertinent recent literature, with the aim of helping to prompt and inform further debate about the tectonic history of the Arctic Ocean.
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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) | 0.000 | 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".