A Block Model of Present‐Day Kinematics of Alaska and Western Canada
Bibliographic record
Abstract
Abstract We present an updated GPS velocity field for Alaska and western Canada and use it to develop the first regionally comprehensive tectonic block model for the area based on modern geodetic data. The greatest tectonic influences along the southern margin are the translation, collision, and flat slab subduction of the Yakutat block and subduction of the Pacific plate. Northward directed velocities surrounding the Yakutat collisional front are consistent with indenter‐related deformation while southcentral Alaska is undergoing a counterclockwise rotation. Westerly velocities in western Alaska and along the Aleutian forearc suggest that crustal material is escaping into the Bering Sea region. The majority of relative plate motion is taken up along major boundary faults, but right‐lateral strike‐slip faults in interior and western Alaska accommodate part of the motion. Escape tectonics in western Alaska extends as far north as the Kaltag fault. We observe significant motion relative to North America in every part of Alaska, including the North Slope. Evidence of localized right‐lateral shear between the Totschunda and Fairweather faults suggests that strain transfer into interior Alaska has moved away from the eastern Denali‐Chatham Strait system to a more direct corridor. Observed deformation in southcentral Alaska indicates that locked portions of the Yakutat flat slab extend further east and north than previously estimated.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 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".