Geochemistry and Nd isotopes of granitoid rocks in the Shikag-Garden lakes area, Ontario: recycled Mesoarchean crust in the central Wabigoon Subprovince
Bibliographic record
Abstract
Neoarchean granitoid rocks from the Shikag-Garden lakes area of the central Wabigoon Subprovince were analyzed to examine the role of recycling of older crust in their petrogenesis. The eNd values calculated at 2.7 Ga range from +1.2 to -6.9 with Nd model ages ranging from 2.80-3.97 Ga. Isotopic modelling calculations suggest that most of the rocks have incorporated older material with a predominant ca. 3.4 Ga component. These data suggest similarities with the Winnipeg River Subprovince, remnants of which may extend in the subsurface across the northern part of the central Wabigoon Subprovince as far south as the Garden Lake greenstone belt. Neoarchean magmatism obliterated most direct evidence for the existence of the Paleoarchean and Mesoarchean terrane, but its antiquity is reflected in the Nd isotopes of the granitoid rocks.
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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 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 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 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".