Geology, Barrow River, Melville Peninsula, Nunavut, NTS 46-O and 46-P
Bibliographic record
Abstract
The Barrow River bedrock geology map is the product of targeted mapping carried out during the summer of 2010, enhanced by radiometric age-dating as well as high-resolution aeromagnetic and radiometric surveys completed over previously published geological maps of the Paleoproterozoic Penrhyn Group and its Archean basement in southeastern Melville Peninsula, Nunavut. The high-resolution aeromagnetic survey was utilized to project lithological boundaries beneath Quaternary cover. The map shows complex basement-cover relationships characterized by multiple generations of thrusting and folding in a thick-skinned tectonic regime, followed by dextral transpression along the southern edge of the Penrhyn Group. A late-Archean tectonometamorphic event is recorded by ca. 2.55 Ga monazite in basement gneiss. Onset of rifting prior to deposition of the Penrhyn Group may be indicated by the emplacement of a bimodal suite of granite and leucogabbro-anorthosite at ca. 2.02 Ga. Penrhyn Group units are tentatively correlated with the Piling Group on Baffin Island.
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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 | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.024 | 0.004 |
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".