Forearc Depressions Develop in Warm Subduction Zones by Underplating‐Induced Crustal Flexure
Bibliographic record
Abstract
ABSTRACT We propose a model for forearc depression formation in warm subduction zones. Forearc depressions overlie some ocean‐continent subduction zones and form between a forearc high and volcanic arc. Forearc highs coincide with 51–91 mGal free‐air gravity anomalies and km‐scale reflector bands in seismic sections, indicating they comprise crust overthickened by underplating. Forearc highs are tectonically sustained topography that overlies the down‐dip termini of megathrust earthquake rupture zones where subduction interface shear stress peaks. Forearc depressions are situated landward of the mantle wedge corner where megathrust earthquake rupture zones and tremor epicentres terminate. Forearc depressions are counter‐flexural basins that form in response to underplating. Counter‐flexure occurs landward of the mantle wedge corner; there, the upper plate crust is no longer supported by the underlying slab and can bend downwards.
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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 | 0.001 |
| 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) | 0.002 | 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 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".