Exotic Mo isotope composition in the Nuvvuagittuq Greenstone belt
Bibliographic record
Abstract
The isotopes of Mo, a moderately siderophile element (MSE), can potentially be used as a new tracer of mantle heterogeneities produced as a result of late accretion, i.e. the ~0.5% addition of extraterrestrial materials to the Earth's mantle after core formation, which is most commonly invoked for explaining the high concents of highly siderophile elements (HSE) and their chondritic relative abundances in the present-day mantle [1]. The rationale for such an approach is based upon (1) the observation that most extraterrestrial materials have different Mo isotope compositions compared with the present-day accessible Earth's mantle. Therefore, late accretion is expected to have changed the Mo isotope composition of the Earth's mantle. (2) the evidence for the preservation of early mantle heterogeneities, in particular in archean rocks, such as those from the Nuvvuagittuq Greenstone Belt (NGB) (Canada, 3.8 Ga) [2,3].
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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 | 0.003 | 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".