Metamorphism of the Southern Meguma terrane and emplacement of the Barrington Passage and Quinan Plutons, southwestern Nova Scotia
Bibliographic record
Abstract
The Meguma terrane, the most outboard terrane of the northern Appalachians, was affected by low-grade (sub-greenschist to greenschist facies) metamorphism during the Devonian Acadian Orogeny. Voluminous syn- to post-tectonic plutonism occurred in the southern part of the terrane, including the Pubnico-Shelburne area. This region experienced amphibolite facies metamorphism. The host rocks of the Barrington Passage Pluton and Quinan Pluton, two late syn- to post-tectonic plutons in the southern part of the Pubnico-Shelburne area, were variably metamorphosed, ranging from chlorite through amphibolite grades. The distribution of isograds about the plutons suggested the rocks were thermally metamorphosed; however, hornfels is absent from the thermal aureoles. Based on petrographic studies, microprobe analyses and geothermobarometric calculations, it has been concluded that the host rocks of the Barrington Passage and Quinan plutons were affected by two metamorphic events: a low-pressure regional event that was closely followed by a contact event related to intrusion of the plutons. The contact event enhanced the effects of the regional metamorphism.
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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 | 0.001 |
| 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".