Cretaceous to Tertiary tectono-thermal evolution of the Laurentian margin in Quebec, Canada-Preliminary results -
Bibliographic record
Abstract
In the Canadian Appalachians, the Laurentian margin (i.e. the Humber zone of Williams 1979) is separated into two subzones, external and internal, based on contrasting deformation style and metamorphic intensity. In southern Quebec, the external Humber zone consists of siliciclastic rocks, limestones and mafic volcanic rocks that are deformed into a series of imbricated northwest-directed thrust nappes. Rock units vary from unmetamorphosed to sub-greenschistfacies of metamorphism. Towards the northwest non-deformed Cambrian and Ordovician siliciclastic rocks and limestones of the St. Lawrence Lowlands overlay the Precambrian basement of the Canadian Shield. The Post-Devonian thermo-tectonic evolution of the eastern margin of the Canadian Shield, the St. Lawrence Lowlands and the external Humber zone is only sparsely known. Along the Chaudiere River transect (external Humber zone) apatite fission track pooled ages range from 136± 11 Ma to 167 ± I l Ma and along the Montmorency transect (St. Lawrence Lowlands to Canadian Shield) from 122 ± 9 Ma to 156 ±11 Ma. At the Montmorency normal fault the apatite FT-age of the hanging wall is 34 Ma younger than the apatite FT-age of the footwall. This age difference is interpreted in the frame of the development of the St. Lawrence River rift system.
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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 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".