Downhole Seismic Logging Techniques In A Regional Hydrogeology Study, Oak Ridges Moraine, Southern Ontario
Bibliographic record
Abstract
Downhole seismic logging surveys have been carried out in plastic-cased, continuously-logged<br>boreholes drilled in the Oak Ridges Moraine (ORM) area in support of a regional hydrogeology study.<br>Compressional-wave logs were obtained using a multi-channel hydrophone array with 0.5 m detector<br>spacings and a surface in-hole shotgun source. These data provide detailed and accurate velocity<br>profiles down the hole. In this area, high velocities (>2500 m/s) are associated with the Newmarket Till,<br>a regionally significant aquitard. These velocities are significantly higher than those associated with<br>adjacent stratigraphic units, and more clearly delineate the Newmarket Till than other borehole logs<br>(natural gamma, conductivity or magnetic susceptibility). These data show that the Newmarket Till is<br>a thick (10’s of metres) unit that can be traced regionally beneath the Oak Ridges Moraine. The<br>downhole seismic data also provide a direct correlation between reflection events and depths which<br>improves the calibration and interpretation of surface seismic reflection data. Shear-wave logs have<br>been obtained in one ORM borehole using a compass-oriented, S-component, well-locked geophone.<br>In this borehole, preliminary correlations have been made between seismic velocities (both<br>compressional and shear) and porosity measurements obtained from the core.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 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".