Petrology, geochemistry, diagenesis and depositional environment of the Upper Devonian - Lower Carboniferous Exshaw Formation, northwestern Alberta.
Bibliographic record
Abstract
The Upper Devonian (Famennian)-Lower Carboniferous (Tournaisian) Exshaw Formation is a thin, laterally extensive organic-rich petroleum source rock. It is one of Canada's most important petroleum source rocks and is a major contributor to the Lower Cretaceous Mannville heavy oil accumulations in the Western Canada Sedimentary Basin. The development of organic-rich deposits has been the center of much controversy as of late, since there are a number of depositional and paleo-oceanographic conditions responsible for their formation. This has led to various models attempting to explain the production and preservation of large quantities of organic matter. The Exshaw Formation is composed of an upper siltstone member and a lower black shale member. For the purpose of this investigation only the lower black shale in the Tangent Field of the Peace River embayment (T80-R23W5) was studied. The lower black shale member of the Exshaw Formation can be divided into two informal units. The lower unit consists of a blocky, calcareous, pyritic shale with chert-rich laminations. This unit is generally more competent than that of the upper more fissile, non- to slightly calcareous shale. (Abstract shortened by UMI.)Dept. of Earth Sciences. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2001 .V47. Source: Masters Abstracts International, Volume: 40-06, page: 1481. Thesis (M.Sc.)--University of Windsor (Canada), 2001.
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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 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".