A petrographic, geochemical, and geochronological study of rare earth element mineralization in the red wine intrusive suite, Labrador, Canada
Bibliographic record
Abstract
The Red Wine Intrusive Suite is located in central Labrador, in the Grenville Province front \nzone. This suite consists of two peralkaline silica-undersaturated (agpaitic) bodies which \nare enveloped by a larger oversaturated component, which previously yielded a U-Pb zircon \ncrystallization age of 1330 +40/-20 Ma. The agpaitic units include melanocratic and \nleucocratic units that occur both as igneous textured and gneissic rocks, and host two \nvarieties of rare earth element (REE) mineralization. The essential mineral assemblage of \nthese units includes variable amounts of K-feldspar, albite, nepheline, pyroxene, \namphibole, and aenigmatite, with local occurrence of eudialyte and britholite as the key \nREE-bearing minerals. \nPetrographic, geochemical and geochronological data indicate that the two key REEminerals \ncrystallized at very different times. Eudialyte occurs in an igneous texture but has \nyielded a U-Pb age of 976 ± 3 Ma, which implies closure of the U-Pb system during cooling \nafter Grenvillian metamorphism. Britholite exhibits a variety of textures, all of which \nindicate secondary crystallization, agreeing with a U-Pb age of 929 Ma which is \nconsiderably younger than the host rocks. Britholite mineralization was likely due to fluid \nflow within highly deformed melanocratic syenites during a period of orogenic collapse \nafter the Grenvillian Orogeny.
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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 | 0.002 | 0.003 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".