A Journey toward the High-Pressure Metamorphism in Continental Crust: P-T-D Path Estimate and 40Ar/39Ar Single Grain Dating on Muscovite of a Tectonic Unit along the Western Edge of the Alpine Corsica (France)
Bibliographic record
Abstract
The first attempt of pressure-temperature-deformation-time (P-T-d-t) path reconstruction for the Lower Units (Alpine Corsica, France) is presented in this work. The Lower Units represent, together with the Tenda Massif, fragments of the European continental margin involved into the east-dipping Alpine subduction. The new data of thermobarometry applied on metapelites and the new 40 Ar/ 39 Ar dating of syn-kinematic muscovite sampled into a metagranitoids allowed to define the P-T conditions and the age of the metamorphism of Venaco Unit, a Lower Unit located in the southernmost sector of the Alpine Corsica. The outcoming scenario indicates that the Venaco Unit reached the baric peak at ≈ 33 km of depth not before the Bartonian time. At 35.7 Ma (i.e., during the middle Priabonian), it was exhumed at shallower structural level (i.e., at ≈ 26 km of depth) mainly through the activation the top-to-the W shear zones. This retrograde path suggests that Venaco Unit experienced a fast exhumation, unlike the Tenda Massif which has already involved into subduction during the Ypresian and stationed at 25-30 km before its exhumation in the Priabonian.
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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 | 0.002 | 0.001 |
| 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".