3‐D Structure of the Northern Oman‐UAE Ophiolite: Widespread, Short‐Lived, Suprasubduction Zone Magmatism
Bibliographic record
Abstract
Abstract The Oman‐United Arab Emirates (UAE) ophiolite is the most intensely studied ophiolite on Earth, is commonly used as a template for other poorly exposed and structurally complex ophiolites, and is often used as an analog for fast‐spreading mid‐ocean ridges like the East Pacific Rise. Several recent studies, including the largest ever focused on the UAE, have suggested that the pseudostratigraphy of the ophiolite in the UAE is distinct from Oman. Such interpretations have led researchers to propose that the UAE portion of the ophiolite underwent a separate magmatic and tectonic evolution. We present a profile along a new road section in the UAE that reveals continuous exposure of the entire ophiolite section and places key constraints on the internal architecture. We infer the geometry of the ophiolite thrust sheet and propose a model for the structure, pseudostratigraphy, and evolution of the ophiolite in the UAE that is simplified yet more consistent with geochemical and geochronological data. Our results indicate that (1) the architecture of ophiolite in the UAE is similar to Oman, and there is no reason to infer a different tectonic history, (2) the ophiolite is gently folded but largely intact, (3) extension and magmatism during formation of the ophiolite was broadly distributed, (4) there are no large gabbro bodies in the mantle sequence; they are all above the petrological Moho, and (5) the entire magmatic sequence was generated in a short time (~1 million years), and thus, the ophiolite cannot be compared to the long‐lasting (>100 million years) fast‐spreading East Pacific Rise.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".