Abstract: The Voisey’s Bay deposits–discovery to pre-feasibility: an exploration perspective
Bibliographic record
Abstract
The discovery of the Voisey’s Bay deposits on the north coast of Labrador is one of the most signifi cant mineral discoveries made in Canada in the last 35 years. The surface discovery by Archean Resouces in 1993 was followed by a fi ve-hole diamond drill program in October of 1994. By July 1995, a major nearsurface deposit, designated as the Ovoid, had been outlined and immediately to the west, the Discovery Hill zone, site of the original discovery, was also delineated. A step-out drilling program east of the Ovoid commenced in August 1995 and resulted in the discovery of the Eastern Deeps zone. The Reid Brook zone was discovered in January of 1997 while testing geophysical conductors in the deeper portions of the host troctolitic dyke west of the Discovery Hill zone. Further exploration to the east along the strike of the deposit trend resulted in the discovery of a zone of mineralization referred to as the North Eastern Deeps zone in 1998, the Ryan’s Pond zone in 1999 and the Red Dog zone in 2000. VBN is currently engaged in an Advanced Surface Exploration program. This is a multi-faceted, two-staged program. Stage 1 is a surface drilling and geophysical program designed to provide the information required to complete pre-feasibility studies on the underground resources. Positive results from Stage 1 will lead to an underground exploration program in Stage 2. The Stage 1 program includes detailed drilling, geophysics, mineralogical and geochemical investigations and geotechnical assessments required to assess the economic potential of the underground resources.
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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 | 0.003 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.004 | 0.008 |
| Scholarly communication | 0.010 | 0.006 |
| Open science | 0.002 | 0.004 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.010 | 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".