A new approach to downhole seismic imaging, Halfmile Lake, New Brunswick
Bibliographic record
Abstract
Downhole seismic data were acquired at Halfmile Lake, New Brunswick, in July 2001, to image known massive sulphide lenses and investigate the potential for a steeply dipping mineralized zone connecting them. The survey comprised two parts designed to provide different imaging capabilities. The first part consisted of four offset VSPs with receivers placed between 265 mand 1300 mdepth. A2.5 kmline with 23 shot points was then recorded at receiver positions between 585 mand 815 m. This novel geometry was selected due to its suitability to image the lateral extent of the sulphide lenses at specific depths. The off-set VSPs image the vertical extent of the sulphide lenses. Data from both parts of the survey already show several reflections after minimal processing. Reflected P- and S-waves and converted waves (P-S) from the Deep Halfmile lens are observed on several VSPs. Data quality is good with significant improvement expected after further processing.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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".