Bedrock geology of the southern Boothia mainland area (Pelly Bay-Rae Strait-Spence Bay map areas), Kitikmeot region, Nunavut
Bibliographic record
Abstract
The Boothia mainland area, part of the north-central Rae Province, comprises a high-grade gneissic terrain dominated by Neoarchean metaplutonic rocks, migmatitic gneiss, Archean supracrustal rocks, and rare Paleoproterozoic supracrustal rocks. The Archean supracrustal rocks are inferred to be cor- relative with the regionally widespread Prince Albert Group. Granitic rocks and their gneissic equivalents are dominated by meta- to peraluminous, polyphase, commonly porphyritic, biotite- and hornblende-bear- ing monzogranite to granodiorite. U-Pb zircon ages indicate they are part of a 2.61 to 2.59 Ga magmatic event recognized throughout most of the Rae Province. Lesser 2.67 to 2.66 Ga plutonism represents a previously unknown age of magmatism in the Rae Province. Small outliers of Paleoproterozoic Chantrey Group metasedimentary rocks (Burwash Lake belt) occur as complex infolds in the Archean rocks, and cor- relate with other Rae Province Paleoproterozoic cover sequences, such as the Amer and Piling groups. The dominant structural fabric of the study area is a moderately to intensely developed regional trans- position foliation (S1), which is folded about map-scale, northeast-trending, Paleoproterozoic F4 folds, doubly plunging about less pervasive north-northwest-trending F5 folds. High-grade (granulite to upper amphibolite facies) metamorphism and migmatization is interpreted to have occurred during 2.6, 2.5, and 1.82 Ga metamorphic events. The north-central Rae Province has signifi cant exploration potential for diamonds. In addition, the Archean metavolcanic rocks in the area have exploration potential for base and precious metals.
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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) | 0.004 | 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".