Temporal relationships between plutonism, metamorphism, and gold mineralization in southwestern New Brunswick: U-Pb and 40Ar/39Ar geochronological constraints
Bibliographic record
Abstract
New U-Pb and 40Ar/39Ar dates from plutonic rocks and quartz veins associated with gold occurrences in southwestern New Brunswick provide timing constraints for mineralization. Plutonic rocks spatially associated with economically significant gold mineralization are all Early Devonian, including a microgranite dyke near the Tower Hill pluton (409 ± 2.4 Ma), the Jimmy Hill granite (403 ± 2 Ma), and a granitic dyke at the Clarence Stream main zone (395.5 ± 0.5 Ma). An auriferous pegmatite dyke at Clarence Stream has a maximum age of ~400Ma based on inherited zircon.Muscovite from quartz veins at the Clarence Stream main zone yields 40Ar/39Ar ages of 395.5 ± 3.6 Ma to 388.9 ± 3.6 Ma and provides minimum age estimates for gold mineralization. The close spatial and temporal association of gold mineralization with Devonian plutonism is consistent with a genetic link.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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".