Predictive Stratigraphic Mapping of Thick Triassic Doig Sandstones in BC and Alberta
Bibliographic record
Abstract
A sequence stratigraphic model is proposed to describe the regional deposition of the thick Triassic Doig sandstones in northwest Alberta and northeast British Columbia, south of the Peace River Embayment (Townships 68 to 80, Ranges 11 to 25 W6 including parts of NTS 93-P). Logs, cuttings and about 50 cores from over 1700 wells were used with seismic to determine depositional facies and regional distribution of the Doig. The 20 to 80m thick Doig sandstones (sensu Wittenburg, 1992) occur within complex Halfway and Doig clinoforming packages. Mapping of several north-south striking clinoforms indicates that the thick Doig sandstones occur as isolated north-south oriented lens-shaped bodies. The growth-faulted thickened Doig sandstones are interpreted from core examination to be deltaic and shoreface facies deposited along accommodation driven shelf margins during forced regressions. Downdip, laterally equivalent slow velocity shales on logs and seismic are interpreted to be associated with slumped muds in front of the aggraded sandstones. The overlying Halfway sandstones are interpreted to comprise highstand systems tract in the clinoforming packages. Isopach maps from well data were integrated into the regional sequence stratigraphic interpretation. As accommodation spaces were filled, the depositional systems would shift around the less compacted thick Doig sandstone bodies. Lobe switching is also interpreted at a local scale within individual aggradational sandstone bodies as the sedimentation adjusted to the changing accommodation space.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.002 |
| Science and technology studies | 0.001 | 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".