PARAGENESIS AND ORIGIN OF SECONDARY BERYLLOPHOSPHATES: BERYLLONITE AND HYDROXYLHERDERITE FROM THE BEP GRANITIC PEGMATITE, SOUTHEASTERN MANITOBA, CANADA
Bibliographic record
Abstract
Les exemples de phosphates contenant le beryllium sont rares, et limites aux pegmatites granitiques et, de facon exceptionnelle, aux granites enrichis en elements rares. Une cristallisation primaire semble tout-a-fait inhabituelle. Au contraire, la plupart de ces phosphates se forment tardivement, au dessous du solidus. Les relations paragenetiques de ces mineraux et les conditions de leur origine ne sont pas bien documentees. Beryllonite, hydroxylherderite et carbonate-fluorapatite se presentent en liseres etroits le long de fissures dans le beryl de la pegmatite granitique de BEP, de sous-type a petalite et d'âge archeen, dans le sud-est du Manitoba. La composition de la beryllonite correspond a sa formule ideale, et la hydroxylherderite contient des traces de fluor seulement. La carbonate-fluorapatite, de type B, fait preuve d'une teneur en P 2 O 5 considerablement reduite, un excedent en fluor, et une teneur en CO 2 qui semble elevee (entre environ 5 et 7% en poids). La beryllonite, formee d'abord, a ensuite ete partiellement remplacee par la hydroxylherderite; une bordure de carbonate-fluorapatite recoupe et remplace les deux phases deja formees. Une faible valeur de a(F) est indiquee au cours de la formation de la beryllonite et de l'hydroxylherderite, mais ce parametre a du passer a une valeur plus elevee quand la carbonate-fluorapatite est apparue. Le processus implique probablement le fluor libere pendant l'echange (OH)F - 1 dans la montebrasite associee.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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 teacher head, 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".