TGI Activity Report: geochemical footprint of the undisturbed Casino porphyry Cu-Mo-Ag-Au deposit, Yukon (NTS 115 J/10 and 115 J/15)
Bibliographic record
Abstract
A detailed geochemical sampling survey at the remote Casino porphyry Cu-Mo-Ag-Au deposit in west central Yukon is described. This new sampling follows-up on previous sampling around the deposit by the Geological Survey of Canada (GSC) in 2017. In late August-early September of 2022, a variety of sample media were collected, including bulk stream sediments, fine-grained stream sediment, pebbles, stream and groundwaters, and vegetation at 27 sites. Sampling was conducted to establish a geochemical baseline around an undisturbed, unglaciated porphyry Cu-Mo-Ag-Au deposit and to demonstrate the applicability of multi-media surficial geochemical methods for exploration in terrains with little to no bedrock outcrop. Bulk stream sediment samples will be processed to recover 0.25-2.0 mm indicator minerals, which may be subjected to further analyses (e.g., electron microprobe and LA-ICP-MS). Fine-grained sediment samples will be submitted for routine geochemical analysis to highlight the proximal geochemistry and to better understand the signal decay downstream from the deposit. Water samples will be subjected to a variety of analytical methods including trace and ultra-trace geochemistry, as well as traditional (?18O, ?2H, ?34S(SO4), and ?18O(SO4)) and non-traditional (?98Mo and ?65Cu) stable isotope analyses. The purpose of this open file is to report fieldwork activities conducted by the GSC as part of the targeted geoscience initiative (TGI-6) program. The objective of this study is to further develop research concepts conceived since 2017 and provide critical knowledge advancement for the exploration of porphyry Cu-Mo-Au deposits.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".