Interpretations of Precambrian basement based on recent aeromagnetic data, Mackenzie Valley, Northwest Territories
Bibliographic record
Abstract
Between 1998 and 2001, the Geological Survey of Canada acquired new aeromagnetic data over the northern Mackenzie Valley, a region of long-standing hydrocarbon and mineral potential. The new data point to a hitherto unidentified structure ('Cape Bathurst line') extending from western Great Bear Lake to Cape Bathurst. This structure may define the western limit of the Slave Province and truncate the Great Bear magmatic zone (easternWopmayOrogen). The data also suggest that the Fort Simpson magnetic high continues west to the Tintina Fault. Although the anomaly apparently has a source in crystalline basement, we cannot demonstrate that it represents a single tectonic entity (Fort Simpson terrane) along its entire length. The style of thrusting in the Colville Hills during the ca. 1.66 Ga Forward Orogeny has been controversial; magnetic modelling is consistent with crystalline basement thin-skinned interpretations.
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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 | 0.004 | 0.004 |
| Science and technology studies | 0.001 | 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) | 0.002 | 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".