Ore Delineation by Crosshole Seismics, Transmission and Reflection Imaging at Voisey’s Bay, Canada
Bibliographic record
Abstract
Three pairs of diamond drillholes were surveyed at Voisey’ Bay, Labrador, Canada, in the Eastern Deeps deposit. The surveys were carried out in NQ diameter drillholes, which were approximately 800-850 m in length. The holes were nearly vertical and hole-to-hole distances ranged from 45 m to 80 m. The p-wave velocity tomography surveys were designed to outline the morphology and continuity of the massive sulphide zone. Reflection imaging was also applied; to confirm whether this method could be used in conjunction with transmission tomography to expand the panel images to a volume. Confidence in the continuity of the massive sulphide zone is crucial since the relatively small massive zone contains a large portion of the metal in the Eastern Deeps deposit. Based on the results of these surveys, further sulphide delineation using surface exploration drillholes may be possible before underground exploration and development.
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| 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".