Macroscopic control on Carlin-type gold mineralization in north-central Yukon
Bibliographic record
Abstract
This open file summarizes observations from diamond drillhole logging on a section through the Sunrise prospect, in north-central Yukon, and to a lesser extent the Osiris prospect. Carlin-type mineralization is hosted in a lime-mudstone unit (Osiris limestone, Neoproterozoic Gametrail Formation) bounded on both sides by a non-calcareous mudstone unit (Osiris Mudstone, Nadaleen Formation), which is interpreted to have low porosity and permeability. This geometry provides first-order control on mineralized zones that are grossly concordant with bedding. Discontinuous rudstone and floatstone intervals in the Gametrail Formation also played an important role in focussing mineralizing fluids and influenced the location, geometry, and characteristics of orebodies. Clast-supported rudstone intervals (flat pebble conglomerate) deposited through short-transport gliding acted as impermeable barriers, whereas matrix supported floatstone and coarse grainstone intervals, deposited through debris flows, preferentially channelled fluids. Variation of the pre-mineralization fracture permeability, due to bed thickness and lithology or specific tectonic features (e.g. cataclastic zone, fold hinge zone), also influenced the location of the mineralization.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".