Orogenic Gold mineralization at 3Ace and Geochemical Characteristics of Quartz Monzonite Dikes at Sprogge, South-east Yukon
Bibliographic record
Abstract
3Ace and Sprogge are two Au occurrences in the southeast Yukon, Selwyn Basin. Gold mineralization at 3Ace was previously believed to be intrusion-related, however, recent petrography and geochemical analysis show mineralization to be associated with mid- Cretaceous orogenesis. Gold occurs along fractures within quartz veins hosted in metasediments of the Neoproterozoic Yusezyu Formation of the Selwyn Basin, and precipitated from low salinity, CO2-rich acidic fluids at temperatures around 300°C. Stable isotopes show evidence of fluid mixing and a significant meteoric water component in the system, but a magmatic contribution cannot be ruled out. X-ray diffraction was used to define alteration assemblages associated with Au. Geochemical analysis was also carried out at Sprogge to garner a better understanding of the regional geology and potential for mineralization. Radiogenic isotopic compositions of quartz monzonite dikes at Sprogge yielded estimated ages between 95.7 ± 2.0 Ma and 103.5 ± 1.2 Ma. Whole rock geochemical analyses indicate the quartz monzonite dikes were produced from similar petrogenetic processes to the Hyland and Tungsten plutonic suites.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".