Till composition and biogeochemistry near a porphyry Cu-Mo deposit: Gibraltar Mine, British Columbia
Bibliographic record
Abstract
During the 2008 field season, eleven till, six lodgepole pine and seven Engelmann spruce outer bark samples were collected near a porphyry Cu-Mo deposit (Gibraltar Mine) in central British Columbia. The purpose of this survey is to test the effectiveness of these sampling medium at detecting mineralization in regions where bedrock mineralization is covered with glacial sediments. Various fractions of the till matrix and bark samples were submitted for geochemical analyses. Our results demonstrate that minor elements (Au, Ag, Ba, Cu, Mo, Te, Zn) and one major oxide (Al2O3) are enriched to various degree in till down-ice from the Gibraltar ore bodies compared to background concentrations reported from the Bonaparte Lake map area south of the mine. Similarly, Cu and Mo are more enriched in lodgepole pine and Engelmann spruce outer bark near Gibraltar compared to the Bonaparte survey. These results attest to the utility of till and tree outer bark geochemical surveys as means to vector towards porphyry mineralization such as that contained in the Gibraltar ore bodies.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".