Application of the sphalerite geobarometer to regionally metamorphosed terrains
Bibliographic record
Abstract
Sphalerite is the most thoroughly investigated of the refractory sulfides and has proven to be a useful geobarometer, particularly in regionally metamorphosed terrains. The concept of the sphalerite geobarometer derives from the variation of the FeS content of sphalerite as a function ofpressure, when the FeS activity is buffered by pyrite * hexagonal pyrrhotite and is not affected by additional Mn or Cd in the sphalerite. Application of the sphalerite geoba-rometer to the regionally metamorphosed sulfides of the Nairne Pyrit ic Formation (4.4 kbar), the Moke Creek area of the Otago Schist (5.7 kbar), and Balmat, New York (5.5 kbar) gives values which are in agreement with other, less precise, geological estimates. Sphalerite compo-sitions from metamorphosed Aphebian massive sulfide ores near Snow Lake, Manitoba, coupled with isograds mapped in the surrounding reenschist and amphibolite facies rocks by Froese and Gasparrini (1975) are compatible with a geologically realistic geotherm of 21'C/km for that region.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.002 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".