Salinization of soil over saline-sodic overburden from the oil sands in Alberta
Bibliographic record
Abstract
Saline-sodic mine overburden (also referred to as spoil) removed to access the oil sands in the Athabasca region of Alberta is used as backfill in open pits and is also placed in large upland structures. These deposits are reclaimed with a soil cover to support re-vegetation. The chemistry within reconstructed soil profiles over saline-sodic overburden was investigated to determine the nature and spatial distribution of salts in the soils. Four reclamation treatments were compared: three layered covers (35, 50 and 100 cm thick) and one non-layered cover (100 cm thick). Salts have accumulated in the cover soils 15 to 20 cm above the overburden, raising the electrical conductivity in the lower part of the soil to between 4.5 and 6.0 dS m -1 , which is beyond the acceptable value for vegetation growth. Salt redistribution was not related to slope position and the pattern of salt ingress suggests that diffusion has been the main mechanism driving salt migration into the soils during the initial 4-yr period following placement. Cover thickness did not affect the extent of salt migration, but the overall quality of the thinner covers (35 and 50 cm) for vegetation growth was compromised by the increased salinity levels.
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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 | 0.001 |
| 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) | 0.000 | 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".