Ultramafic cumulates east of Kingnait Fiord, Cumberland Peninsula, Nunavut: possible origin and mineral potential
Bibliographic record
Abstract
An occurrence of ultramafic rocks on central Cumberland Peninsula of Baffin Island consists of coarse-grained, variably layered peridotite with an assemblage of Mg-rich olivine (Fo65-85), chromite, ilmenite, and Mg-amphibole. Olivine is transected by serpentine-filled fractures that are truncated by secondary tremolite and chlorite. Bulk compositions correspond closely to those of unaltered wehrlitic cumulates. Trace-element profiles show enrichment in incompatible elements relative to primitive mantle, and predict a parental magma compositionally resembling ocean island basalt. Intrusive phases related to such plume-related magmatism are known elsewhere for their nickel and PGE potential. Accordingly, although the Kingnait Fiord ultramafic rocks likely relate to rift magmatism of Paleoproterozoic age, exploration models developed for intrusion-hosted nickel sulphide and platinum-reef mineralization in younger systems of similar composition should be applied.
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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 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".