Airborne gamma-ray spectrometry over the Endako porphyry molybdenum district in central British Columbia
Bibliographic record
Abstract
In 1995 airborne gamma-ray spectrometric data were acquired over the Endako porphyry molybdenum district in central British Columbia. Here we analyze these data together with surficial and lithogeochemical data to assess their utility as an aid to geological mapping and mineral exploration. Our results show that individual surficial units (e.g. till, glaciolacustrine, alluvium, etc.) cannot be distinguished in airborne data or geochemical analyses of surficial deposits. We observe small differences in mean radioelement concentrations between mapped bedrock units, even in areas of thick overburden; however, as all such differences are statistically insignificant, individual bedrock units cannot be uniquely identified by their radioelement response alone. We conclude that airborne spectrometry has limited mapping application where variations in bedrock compositions are subtle. Unlike other porphyry molybdenum occurrences in Canada, those in our study area are characterized by modest enrichments in both K and eTh relative to the host rock and significant eTh/K depletions are not observed.
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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 | 0.002 |
| 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".