Detrital zircon geochronology of the Archean volcano-sedimentary sequence of the Barclay belt and the Paleoproterozoic marble-quartzite sequence of the Northern Chantrey group, Boothia mainland area, Kitikmeot region, Nunavut
Bibliographic record
Abstract
The 'Boothia mainland area', in the Kitikmeot region of Nunavut, is located in the northern Rae Domain of the western Churchill Province. The area is characterized by variable deformed and metamorphosed volcano-sedimentary rocks of the Barclay belt; metaplutonic rocks, which dominate the region; and a marble-quartzite sequence that is informally referred to as the Northern Chantrey group. Detrital zircon geochronology studies of three samples were conducted using the Sensitive High-Resolution Ion Micro Probe to constrain the timing of deposition of the supracrustal sequences in the mapping area. Asample of psammitic schist from the volcano-sedimentary Barclay belt gave a maximum depositional age of 2764 ± 23 Ma based on the youngest detrital zircon. Two samples of psammitic schist from different stratigraphic levels within the Northern Chantrey group gave a maximum depositional age of 2454 ± 13 Ma based on the youngest detrital zircon age.
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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 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.001 | 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".