Application of FactSage to Model the Compositional Variability of the of the Tamarack Intrusive Complex Ni-Cu-PGE Mineralization at the Main Zone
Bibliographic record
Abstract
The Tamarack Intrusive complex (TIC) is one of the satellite intrusions of the Duluth Complex, and is located about 75 kilometers west of Duluth, Minnesota. The Ni-Cu-PGE sulfide mineralization at the Main Zone of the TIC exhibits diverse ore types, including disseminated sulfides, semi-massive sulfides, and massive sulfide veins, distinguished by their compositions. This study aims to understand the processes responsible for these variations by employing for the first time the thermodynamic model FactSage 8.3 as a tool to understand the evolutionary path of the sulfide melt. Initial segregation of sulfide liquid was modeled in various ways. FactSage was used to show that the assimilation of 27wt% local semipelite by the presumed parental picritic magma could provoke sulfide saturation. The study also demonstrates that sulfide mineralization at the Main Zone could have been driven by the assimilation of H2S gas generated by devolatilization of the host Virginia Formation during
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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".