Geomathematical study of sandstones overlying the Phoenix Uranium Deposits and the REE-rich Maw Zone, Athabasca Basin, Saskatchewan
Bibliographic record
Abstract
To evaluate the relationship between the enrichment of REEs and U mineralization, we carried out Principal Component Analysis (PCA) of sandstones above the Phoenix U deposits and in the REE-rich Maw Zone in the eastern Athabasca Basin. The Phoenix deposits, with indicated resources of 70.2 M lbs U3O8, occur along the unconformity and a steeply dipping fault in the basement at ca. 400 m depth. The Maw Zone, a breccia pipe with surface exposure of 300 by 200 m, consists of highly silicified, hematitized, dravitic tourmaline-rich rocks with high REE (<8.1 wt. % as total REE oxides). The Maw Zone is ca. 4 km southwest from the south end of Phoenix deposits and does not contain high U (< 7.8 ppm U) contents. PCA of sandstones above the Phoenix deposits shows that U is associated with Heavy REEs (HREE)+Y, Light REEs (LREE) and Pb, and inversely correlated with Ti, Zr, Al, and Th. The Maw Zone displays different element groupings as revealed by PCA: U is strongly correlated with V, Cr, Fe, Ni, Cu, Cd, Na, Li and Ba, but very weakly correlated with HREEs+Y, and inversely with LREEs and P. Relative enrichment of HREEs, Y, and P suggests xenotime is the predominant host of the HREEs. The grouping of LREEs+Sr+Th+P suggests the occurrence of monazite and/or aluminum phosphate-sulphate (APS) minerals. A mineralogical study confirmed xenotime and APS minerals as the major host of HREEs and LREEs, respectively. These REE-bearing minerals precipitated from hydrothermal fluids during the brecciation of hematitized sandstones. The positive association between U and Fe in the PCA plot from the Maw Zone suggests that U was transported by oxidized fluids. The absence of U mineralization in the Maw Zone is explained by low U in the oxidizing fluids, or a lack reducing fluids to precipitate U.
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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 | 0.004 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".