FORMATION OF Pt Fe ALLOY BY DESULFURIZATION OF Pt Pd SULFIDE IN THE J M REEF OF THE STILLWATER COMPLEX, MONTANA
Bibliographic record
Abstract
L'alliage Pt-Fe (Pt 3 Fe) faisant partie du banc J-M du complexe de Stillwater, a la mine Stillwater, au Montana, se presente en intercroissances avec un sulfure de Fe-Ni-Cu secondaire. Cet assemblage remplace un sulfure de Pt-Pd (braggite ou cooperite). Le meme alliage se presente en grains distincts associes a chalcopyrite, tellurures de Pt-Pd, et or natif dans les assemblages alteres contenant chlorite, epidote, amphibole, talc et serpentine. L'intercroissance se limite aux echantillons montrant une faible quantite d'alteration ( 20%, volume) dans le banc J-M a la mine Stillwater et ailleurs dans ce meme horizon. La presence de chalcopyrite et d'inclusions de pentlandite originelles dans le sulfure Pt-Pd altere fait penser que ce sulfure a cristallise a partir d'un liquide sulfure apres la cristallisation de la chalcopyrite et d'un precurseur de haute temperature de la pentlandite, et s'est fait remplacer par l'intercroissance de l'alliage Pt-Fe avec sulfure Fe-Ni-Cu secondaire a cause d'une interaction avec une phase fluide hydrothermale sous-saturee en S. La pentlandite associee au sulfure Pt-Pd altere contient des teneurs plus elevees en Pd (jusqu'a 9.8%, poids) que la pentlandite non associee, ce qui temoignerait d'un gain de Pd par la pentlandite grâce a des reactions d'echange Ni-pour-Pd avec l'intercroissance qui remplace le sulfure Pt-Pd au cours de la desulfuration.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.001 | 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".