Emplacement history of the Central Anatolian Ophiolites: insights from the Felahiye Ophiolite in Central Türkiye
Bibliographic record
Abstract
The Central Anatolian Crystalline Complex (CACC) is represented by Late Cretaceous Barrovian-type metamorphism, ophiolite obduction and numerous intrusive granitoid rocks. The Felahiye Ophiolite, which is a part of the Central Anatolian Ophiolites (CAOs), represents a significant remnant of the Late Cretaceous oceanic lithosphere in the eastern CACC. However, the exact origin and polarity of the subduction zones involved in the formation of these ophiolites and mélanges remain unclear. This study presents new field, geochemical, and geochronological data from the Felahiye Ophiolite to address these critical questions. The integration of geochemical, petrographic, and field data supports the interpretation that the Felahiye Ophiolite is a remnant of the Late Cretaceous supra-subduction type oceanic crust. U-Pb zircon crystallization age of 92.0 ± 1.1 Ma was obtained from a cumulate gabbro of the Felahiye Ophiolite. Hafnium isotope compositions of these zircons (εHf(t) = +8 to + 12) suggest a depleted mantle source. 40Ar/39Ar dating of amphibole from a gabbro provided a cooling age of 69.4 ± 3.2 Ma, suggesting thermal influence of granitoid intrusions following ophiolite emplacement. We propose a new model for the origin of the CAOs, emphasizing eastward subduction of an ocean basin located both east and west of the CACC. This is consistent with the CAOs forming on N-S trending ridges within an eastward-subducting ocean, leading to westward obduction onto the CACC, N-S trending magmatic arc development in the CACC, and distinct geological histories from those of the Tauride Belt Ophiolites.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.015 | 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".