The Evolution of Metasomatic Uranium Ore Systems in the Central Mineral Belt of Labrador
Bibliographic record
Abstract
In quantitative LA-ICP-MS maps of uraninite from the Kitts-Post Hill belt in Central Labrador, remobilization of U and LREE along grain boundaries/fractures support the varying degrees of alteration recorded in major/trace element chemistry.Primary uraninite contains elevated Th, Zr, and REE contents implying crystallization from high-temperature fluids capable of transporting HFSE.Altered grains are characterized by elevated Zr, low Th and low REE contents, indicating potential remobilization in response to regional tectonic-magmatic events.In chondritenormalized plots of uraninite, contrasting REE signatures imply three populations, formed under different temperatures/physico-chemical conditions.Magnetite geochemistry reveals at least two events, characterized by both magmatic-like V contents, and hydrothermal Ni/Cr ratios.The inferred contrasting fluid sources, reflected in the major/trace element compositions, reveal a fluid history complicated by post-ore magmatism and metamorphism.Potential syn-uranium mineralization hydrothermal zircon grains from the Kitts and Gear deposits were analyzed by SHRIMP and record isotopic re-setting ca.1800 Ma.iii
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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 | 0.002 |
| Science and technology studies | 0.001 | 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) | 0.001 | 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 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".