Geochemical dispersion in groundwater from a weathered Cu–Zn deposit in glaciated terrain
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Weathering of mineral deposits under glacial cover may slowly release elements to the groundwater that disperse forming secondary geochemical halos. The Tillex Cu–Zn deposit subcrops beneath a sand aquifer and glacial clay/silt aquitard that extends to the surface. A conceptual model was developed based on hydrologic, geochemical and mineralogical data to describe dispersion in the aquifer and aquitard overlying the mineralization. In the recharge zone, dissolved oxygen oxidizes detrital sulphides in the aquifer and aquitard, which promotes the dissolution of carbonate minerals, increasing the concentrations of Ca and Mg. Iron released by sulphide oxidation precipitates as Fe (III) oxyhydroxides. Trace metals released during sulphide oxidation may be subsequently adsorbed onto, or co-precipitated with, clays and Fe oxyhydroxides. Sulphate-reducing conditions occur deep in the aquifer over the mineralization and there is no evidence of metal transport upward through the overlying sand and clay/silt overburden. The sulphate-reducing conditions are not favourable for the development of a plume of weathering products that could represent a target for mineral exploration. The one-dimensional reactive transport model PHREEQC was used to test the conceptual model by simulating the hydrogeochemical conditions in the aquitard. The observed data correspond well to the model results, suggesting that the conceptual model is reasonable.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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 it