Timing of sulphide saturation and ore formation in the Sudbury Igneous Complex
Why this work is in the frame
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Bibliographic record
Abstract
The Sudbury Igneous Complex (SIC) is widely believed to be the result of melt generation due to meteorite impact, and so models of Ni-Cu-PGE sulphide ore formation must be reconciled with this hypothesis. Moreover, the formation of the Ni and Cu sulphide ores is a product of sulphide saturation and segregation of immiscible sulphide melts, and like the ores at Noril’sk, those at Sudbury leave a fingerprint of the process in the comagmatic silicate rocks which are bereft of much of their Ni, Cu and PGE. At Sudbury, the thickest part of metal-depleted norite is located proximal to the largest known deposits, viz. the Creighton, Copper Cliff and Frood-Stobie Deposits. It is believed that the formation of the initial immiscible sulphide took place shortly after melt sheet formation, but well before any significant amount of silicate crystallization; sulphide saturation and segregation from the crustal melt sheet likely occurred under superheated conditions. The geological data provide important constraints on the sequence of events that formed the different orebodies in contact, footwall and offset dyke environments.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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) | 0.000 | 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 it