The Role of Orogenic Collapse on Tectonic Inheritance of Passive Continental Margins
Bibliographic record
Abstract
Abstract The break‐up and drift of continents is governed by the reactivation of structures in the lithosphere that occur in preference to formation of new structures during rifting. Numerical analyses indicate that mantle heterogeneities should be a first‐order control on tectonic inheritance; however, the importance of mantle relative to crustal structures has not been tested by observation in the geological record. Seismic anisotropy analysis using shear wave splitting of seismic waves are a useful tool to constrain past episodes of lithospheric deformation in the upper mantle. Analysis of published SKS directions colinear to orogenic trends, geometry of intracratonic faults and rift basins, and prolongation of basement structures into oceanic lithosphere all suggest a role of the mantle in controlling tectonic inheritance and crustal orogenesis. The geometry of the continental margin and temporal constraints point to a process involving lithosphere‐scale structures mimicked in the oceanic lithosphere due to orogenic collapse. The occurrence of fracture zones of the Labrador Sea that correspond with major structures in the Grenville, Appalachian, and older orogens suggest that deformation of the lithosphere and propagation of oceanic transforms are influenced by rheology in the upper mantle that formed during previous episodes of continental collision. If inheritance occurs at a lithospheric scale and is rooted in the mantle, it implies that orogenic collapse is an important mechanism for ocean opening along rifted continental margins. The geometry and morphology of the modern Atlantic Ocean may have been predetermined by Archean plate tectonic processes.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".