Petroleum systems offshore western Ireland in an Atlantic margin context
Bibliographic record
Abstract
Abstract The Rockall, Slyne, Erris and Porcupine basins on the Atlantic margin off Ireland belong to a family of geologically similar basins stretching from offshore mid-Norway to offshore Newfoundland. Jurassic sequences act as reservoir and source rocks in many of the basins. Cretaceous extensional faulting was widespread and major subsidence affected several basins. Cretaceous submarine fan and shallow marine sandstones and Paleocene submarine fan sandstones often provide reservoir targets. Cretaceous and Paleocene to Eocene volcanic rocks are widespread and Eocene to Recent net subsidence has resulted in water depths which generally exceed 200m and reach over 2000m in the south. Passive uplift affected the land areas to the east in Neogene times. Proven Jurassic-sourced petroleum systems occur in six basins from the Halten Terrace to the Jeanne d’Arc Basin, including the northern Porcupine Basin and the Slyne-Erris basins. In the latter the Jurassic petroleum system has been destroyed by uplift, but a Carboniferous petroleum system has proved successful there for gas. West and northwest of these proven basins, on the ‘outboard’ side of the Atlantic margin, are large frontier areas. Recent gas discoveries in the deep Vøring Basin prove the existence of petroleum systems there but the source is not known. On both margins of the Rockall Basin and in the southern Porcupine Basin petroleum systems may exist but are not yet proven.
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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 | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".