Magnetic and gravity models across terrane boundaries in southern New Brunswick, Canada
Bibliographic record
Abstract
Regional magnetic and gravity map patterns, combined with modeling of magnetic and gravity data constrained by measured magnetic susceptibility and density information, are used to develop a better understanding of the three-dimensional character of major lithostratigraphic subdivisions (terranes) in southern New Brunswick. Models and long wavelength map patterns indicate that the boundaries between the Caledonia, Brookville, Kingston, and New River terranes are sub-vertical or dip slightly to the southeast, and that some map units in each terrane extend to depths ranging from 50008000 m. The Mascarene and St. Croix terranes are less well constrained than the more outboard terranes on the models, in part because of limited physical property data but also because of the presence of the Saint George Batholith, which obscures relationships among stratigraphic units. The models are consistent with the Mascarene terrane being a cover sequence over the boundary between the St. Croix and New River terranes, the specific location and nature of which is now revealed by the geophysical models. The terranes appear to be associated at depth with geophysically distinct bodies that are interpreted to correspond to the basements, from southeast to northwest, of Avalon terrane sensu stricto, BrookvilleBras d'Or terrane, and ExploitsGander composite terrane. The latter "Gander basement" underlies the Kingston, New River, Mascarene, and St. Croix terranes.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".