Amagmatic Extension and Thick Oceanic Crust in the Eastern Black Sea.
Bibliographic record
Abstract
Volcanic rifted margins exhibit extensive syn-rift magmatism during extension and produce thick ocean crust during initial spreading, whilst magma-poor margins are characterised by limited syn-rift magmatism, highly stretched continental crust and areas of exhumed mantle. Often these two types of rifting can be seen along the same margin (e.g., Gulf of California and eastern Canada), but the nature of the transition from one to the other is poorly understood. New seismic refraction data collected in the Eastern Black Sea (EBS) provide provocative new constraints on this type of transition. The Black Sea can be divided into two sub-basins that have distinct tectonic histories. The EBS is thought to have opened by rotation of the Shatsky Ridge away from the Mid Black Sea High, with rifting culminating in the early Cenozoic. Previous studies have revealed a thick sedimentary package (8-9 km) underlain by thin crust in the centre of the basin, but the nature of the crust has remained controversial. In spring 2005, we collected four wide-angle seismic profiles in the EBS basin as shown in figure 1. Lines 2 and 3 are approximately orientated parallel to the inferred direction of extension and located ~ 200 km apart. Line 1 connects these lines, traversing the centre of the basin and sampling some of the thinnest crust.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.001 | 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".