A chemostratigraphic characterization of Newmarket Till in drill core from north of Lake Ontario
Bibliographic record
Abstract
The Newmarket Till (NT) covers much of the south-central Ontario forming a regional stratigraphic marker. Geochemical analysis was performed using aqua regia, four-acid, and flux-fusion digestion on 137 samples of NT collected from 8 boreholes across two regional transects to quantify potential geochemical variations through the till. The geochemistry of the <63 ?m size fraction exhibits strong elemental correlations between major and trace element contents and CaO. All major elements exhibit negative correlations with CaO contents indicative of the incorporation of Paleozoic carbonates flooring the southern Ontario Basin. A chemical ratio of CaO+MgO/SiO2+Al2O3 (Provenance Indicator) suggest significant quantities of material from the Paleozoic carbonates were incorporated into the till matrix as ice moved south of the Canadian Shield. High precision sampling using portable XRF methods for a continuous sediment core located near Pickering Ontario, allowed for the identification of 4 geochemical subfacies unidentifiable on the macro scale along with 3 interbeds. These geochemical subunits in the NT cannot be traced to nearby boreholes and hence do not have regional extent.
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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 | 0.001 |
| Science and technology studies | 0.001 | 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) | 0.002 | 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 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".