Bibliographic record
Abstract
Pelitic metasediments immediately southwest of Yale, British Columbia contain mineral assemblages characteristic of staurolite through sillimanite zones of the Barrovian facies series. Isograds are steeply dipping. Two phases of deformation are recognized with metamorphism being syn- to post-tectonic. Pseudomorphs after andalusite indicate that contact metamorphism preceded regional upgrading of the pelites. Microprobe analyses of major silicate phases in the pelites are combined with linear regression techniques in discussing possible kyanite- and sillimanite-forming reactions. A zone some 3 kilometers wide contains the assemblage staurolite-kyanite-garnet-biotite-muscovite-quartz which is univariant in AFM projection. Regression analysis of the staurolite-kyanite assemblage reveals the sensitivity of regression methods to error limits associated with the different minerals present. Precision of the analyses was not high enough for regression analysis to differentiate between stable, divariant equilibrium and a buffered, univariant reaction relation for this assemblage. Pelitic and calc-silicate assemblages from the metasediments restrict pressure-temperature conditions during regional metamorphism to 5½-8 kilobars and 550-700°C. It is suggested that deformation, emplacement of granitic intrusions, and regional metamorphism are all part of the Cretaceous orogeny which formed structures of the Cascades Mountains.
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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 | 0.002 |
| Science and technology studies | 0.004 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.019 | 0.002 |
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".