Detrital zircon fission-track thermochronology and U-Pb geochronology of syn-rift, Lower Cretaceous Hibernia Formation strata, Jeanne d’Arc basin, offshore Newfoundland
Bibliographic record
Abstract
The Newfoundland margin was established after Mesozoic continental rifting broke up supercontinent Pangea and opened the North Atlantic Ocean between North America and Europe. Normal faults cut through the lithosphere to accommodate extension and created a dynamic landscape that shifted as the rift system evolved over ~150 million years. Upper Triassic to Upper Cretaceous sedimentary rock units of the Jeanne d’Arc basin, Grand Banks, offshore Newfoundland, have been broadly correlated to rift processes, however, the precise timing of riftrelated exhumation and details of ancient drainage systems were uncertain. New stratigraphic and sediment provenance results for Lower Cretaceous Hibernia Formation strata, including those that are known reservoir units at the Hibernia oil field, confirm rift-related exhumation was occurring in the Grand Banks during the Triassic to Jurassic and Early Cretaceous and can be tied to rift processes occurring further offshore in deep-water settings. North-flowing, Early Cretaceous rivers and delta systems drained highlands that were located south of the Jeanne d’Arc basin and comprised both uplifted rocks of the Appalachian orogen and active, syn-rift volcanic centers.
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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 | 0.002 | 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".