Enrichment of massive sulfdes from the Semenov hydrothermal cluster (Mid-Atlantic ridge) in barite: a result of E-MORB involvement and magmatic contribution
Bibliographic record
Abstract
The paper reviews and compares the barite fndings in hydrothermal felds of the mid-oceanic ridges. The genetic signifcance of barite is considered for the Semenov hydrothermal sulfde cluster associated with an oceanic core complex (OCC) at 13°30? N of the Mid-Atlantic Ridge. Massive sulfdes of the Semenov-1, -3, and -4 felds are enriched in barite (up to 20 vol. %) and therefore Ba (up to 4.12 wt. %). The presence of a signifcant amount of barite and a high Ba content of massive sulfdes of the OCC-related felds link their formation with E-MORBs. Magmartic contribution for the formation of massive sulfdes from some Semenov felds is supported by negative values of S isotopic composition of sulfdes associated with barite, the presence of magmatic gases (CO2 and SO2) in Raman spectra of fuid inclusions in barite and the results of physicochemical modeling, which indicate the formation of barite-sulfde assemblage upon the interaction of E-MORBs, seawater, and magmatic gas. The results of modeling of the system with felsic rocks show that oceanic plagiogranites from OCC structure could be an additional supplier of Ba.
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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) | 0.000 | 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 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".