Control of lithospheric inheritance on neotectonic activity in northwestern Canada?
Bibliographic record
Abstract
Abstract Lithospheric inheritance is thought to affect the location and reactivation of tectonic structures through successive cycles of supercontinent formation and dispersal; however, its relation to neotectonic activity remains unclear. In northwestern Canada, abundant seismicity throughout the northern Canadian Cordillera (NCC) is geographically confined by several crustal-scale boundaries, yet its southern extent terminates abruptly along the inferred westward extension of a Late Cretaceous rifted margin boundary called the Liard transfer zone (LTZ). We use seismic data to show that the uppermost mantle beneath the Cordillera exhibits a sharp north-south contrast in fabric across the LTZ. South of the LTZ, fast axes of seismic wave propagation align closely with the lithospheric mantle fabric orientation of the adjacent Canadian shield. North of the LTZ, fast axes are reoriented subparallel to the motion of the Pacific plate and follow the strike of the large dextral strike-slip Tintina and Denali faults. We attribute changes in anisotropic delay times across the Tintina and Denali faults to localized shear within the lithosphere; this implies that the crust and lithospheric mantle remained mechanically coupled during shearing. We propose that the contrast in uppermost mantle structure across the LTZ reflects a change in the nature and origin of the lithospheric mantle from inherited rifted margin structures, which affects the stability of the lithosphere and limits the extent of seismic activity within the NCC. These results indicate that neotectonic activity in modern Cordilleras is controlled in part by inherited upper mantle structures.
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 distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 teacher head, 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".