The Line Rock Pegmatite Dike, Mont Saint-Hilaire, Quebec
Bibliographic record
Abstract
Abstract The informally named Line Rock miarolitic pegmatite dike, briefly exposed in the Poudrette quarry at Mont Saint-Hilaire, Quebec, attracted our attention because of the unusual occurrence of aplitic “line rock”, not described from the quarry before. The upper zones of the thin (105 cm), sloping, tabular dike consist of elongate, outwardly flaring crystals of microcline perthite aligned toward the core and of sodalite (variety hackmanite), formed by replacement of nepheline. The primary feldspar, a sanidine solid-solution, formed at 800 °C or so, and eventually inverted successfully to orthoclase perthite, then to microcline perthite in this peralkaline environment. Below the core, the elongate crystals are oriented upward. In the core, microcline surrounded by schizolite is only partly ordered and contains relict orthoclase. Sodalite and nepheline are minor phases in the line rock interval above the base. There, microcline, albite, and aegirine define a subsolvus assemblage in a 15 cm stack of alternating light-colored feldspathic and dark aegirine-bearing aplitic layers. These formed by repeated buildup of rejected constituents at the rapidly advancing solid–melt interface. The peralkaline low-viscosity magma attained saturation in a saline aqueous fluid. Open space due to shrinkage of the zoned tabular dike was later filled by schizolite precipitated from a fluid phase, possibly a less strongly alkaline one.
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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 | 0.003 | 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) | 0.018 | 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".