Bibliographic record
Abstract
The Kovdor phlogopite deposit, one of the largest on Earth, occurs in the northwestern part of the Kovdor carbonatite-bearing alkaline-ultrabasic complex, Kola Peninsula, Russia. The Main phlogopite lode is situated in the central part of a semicircular zone of phlogopite-rich rocks; its morphology is similar to some bodies of granitic pegmatites, hosted in granites, and has a zonal structure. The rocks of the marginal part are monomineralic and consist of giant crystals (up to 2 m across) of diopside, whereas near the center are zones of forsterite–phlogopite, forsterite and apatite rocks. A microtextural study of the phlogopite-bearing bodies shows a regular pattern of spatial arrangement of the main minerals. All grew from the contacts of individual vein-like bodies toward the center. The chemical composition of the main rock-forming minerals (forsterite, phlogopite, diopside) is characterized by lower contents of Ti and Fe compared to the compositions of those minerals in olivinites, but are relatively enriched compared to the same minerals in phoscorites and carbonatites. Gas extracted from phlogopite and apatite shows that hydrogen is an important component in the inclusions. Thermometric data suggest that the formation of the main minerals in the deposit took place at a high temperature, in the range 800–900°C, whereas hydrostatic pressure in the system barely exceeded 2000 bars. On the basis of its shape, structure, features of mineral growth and crystallization sequence, the Main phlogopite lode may be regarded as a peculiar alkali-ultrabasic pegmatite.
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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 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".