Slab break-off and subduction polarity reversal after collision can be very fast
Bibliographic record
Abstract
Abstract Slab break-off and polarity reversal are tectonic events that often occur in relation to the subduction process. For example, the Western Alps and Ontong Java are high profile cases of slab break-off and polarity reversal. A sufficient number of high-quality geological examples indicate a very short time frame (an average of <6 m.y.) for slab break-off and polarity reversal after a collisional event. On the other hand, previous numerical modeling studies propose the timing of these collision break-off events to be on an average time scale between 7.5 and 23.2 m.y. This study reconciles the geological observations from 17 ancient and contemporary subduction zones with a suite of numerical experiments. By synthesizing geological evidence and our geodynamic models, we propose that the majority of slab break-off and polarity reversal processes can be geologically fast (average <6 m.y.), contrary to current thinking.
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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 | 0.000 |
| 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".