Crandallite-group minerals: host of thorium enrichment in the eastern Athabasca Basin, Saskatchewan
Bibliographic record
Abstract
Spectral gamma-ray logs in the McArthur River area in eastern Athabasca Basin indicate anomalously high thorium content in the conglomeratic Bird Member and the lower part of the Collins Member of the Manitou Falls Formation. The distribution of Th in such coarse-grained fluvial strata is usually associated with accessory minerals in the heavy-mineral fraction. Instead, petrographic, chemical, and SEM analyses reported here show that Th in the Manitou Falls Formation conglomerate beds resides in a Th-rich aluminophosphate mineral. It belongs to the solid-solution series of the crandallite group, including crandallite (CaAl3(PO4)2(OH)5·H2O) and goyazite (SrAl3(PO4)2(OH)5·H2O). Crandallite-group minerals form in highly acidic environments and are associated with clay minerals such as illite. A more extensive investigation is required to determine the relationships between the Th-rich crandallite-group phase, clay minerals, and the hydrothermal processes that operated during the formation of uranium deposits in the Athabasca Basin.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 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 | 0.001 | 0.001 |
| 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 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".