Linear analysis of melt band formation in a mid‐ocean ridge corner flow
Bibliographic record
Abstract
Abstract Imposing external shear on systems of partial melt can cause compaction of the solid matrix and concentration of the interstitial liquid melt thereby generating bands of contrasting high and low porosity. These shear‐induced porosity bands have been proposed to channel melt beneath a mid‐ocean ridge (MOR). In this contribution, we impose a shear flow that evolves as the bands are transported along streamlines of MOR corner flow. We evaluate the suitability of porosity band formation as a mechanism for melt channeling beneath a MOR using a linear instability analysis with three different matrix viscosity conditions: isotropic strain rate independent, isotropic strain rate dependent, and anisotropic. Our analysis shows that the largest amplitude bands channel melt away from the ridge axis toward the base of the plate at the lithosphere‐asthenosphere boundary, while the effectiveness of channeling through the bands is highly dependent on the mantle bulk viscosity.
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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 | 0.000 | 0.001 |
| 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 | 0.001 | 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 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".