Preliminary report on the U-Pb geochronology of the northern margin of the Trans-Hudson Orogen, central Baffin Island; Radiogenic Age and Isotopic Studies: Report 15
Bibliographic record
Abstract
A 2827 +8/.7 Ma age for a monzogranite represents the first confirmation that Archean crust forms the cores of antiformal culminations in the Dewar Lakes area, and is consistent with the suggestion that these culminations represent erosional windows exposing the southernmost edge of the Rae craton. A2719 " 4 Ma megacrystic monzogranite from the northern Archean basement is temporally and lithologically similar to ca. 2726.2714 Ma megacrystic granite bodies in the Eqe Bay area to the northwest. Uranium-lead dating of a biotite-allanite monzogranite reveals a Neoarchean emplacement age of 2738+25/.21 Ma, suggesting that Paleoproterozoic plutonic rocks within the Archean basement in the Flint Lake area may not be as extensive as previously suspected. A crystallization age of 1897 +7/.4 Ma for a K-feldspar-megacrystic monzogranite, previously correlated with the mostly 1.87.1.85 Ga Cumberland batholith, indicates that psammite enclaves within the pluton must be older than ca. 1.90 Ga.
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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) | 0.007 | 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".