Bibliographic record
Abstract
The essentials of the unconformity-related U (± precious and base metals, REE...) association are illustrated by the Mesoproterozoic systems of the Athabasca Basin (Canada) and the Alligator Rivers (Australia) regions, sites of major production and high grade resources of U. Significant elements of such systems includei) a regional redox interface corresponding broadly to the unconformity separating an oxidised sedimentary pile from C and/or Fe2+ rich reductants in or near the basement;ii) sources of oxidised (high SO42-/H2S, evaporite- interacted, moderate to high salinity) fluids in/above the sedimentary basin succession. Such fluids may transport numerous components and their progressive interaction with reductants may give rise to characteristic geochemical and mineralogical patterns at deposit and broader scales;iii) linked fault systems operative during sedimentary basin inversion or subsequent compression;iv) the mechanical contrasts of the basement with the sedimentary cover package;v) and probably, uranium-enriched rocks in the basement and/or in cover sediments and volcanics.Other well endowed uranium systems, for example the Proterozoic Westmoreland district (Queensland and the Northern Territory), exhibit the key elements of the unconformity-related association, but the main deposits are localised around redox interfaces the faults away from the basal unconformity. A clear picture of the Westmoreland regional mineralised system is provided by integrated airborne geophysical and geological information, providing a model for systems elsewhere.The prospectivity of the unconformity-related association is not restricted to the Mesoproterozoic. Examples of systems which display the essentials of the association include the late Palaeozoic-aged Ben Lomond and Maureen U-Mo deposits (Queensland) and others in Central Asia, plus Palaeoproterozoic U, precious and base metal deposits in Canada and elsewhere.More effective exploration and regional targeting models will result from the application of the model outlined above.
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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 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.000 | 0.002 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.009 | 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".