Abstract: An integrated structural, fluid inclusion, and stable isotope study of auriferous veins, The Ovens, southern Nova Scotia
Bibliographic record
Abstract
The Ovens area of southern Nova Scotia is underlain by interbedded slate and sandstone of the Meguma Group that were metamorphosed and deformed during the Acadian Orogeny. Rocks outcrop in the hinge zone of a northeasttrending anticline (chevron) and are cut by numerous auriferous quartz veins. Structural analysis of beddingconcordant and -discordant vein types indicates emplacement late in the deformation history during flexural-slip folding. Mutually cross-cutting relationships of the veins suggest synchronous emplacement of all vein types. Quartz vein material collected from all vein types was examined for fluid inclusions. Results of a petrographic study indicate that inclusions are of secondary and pseudosecondary origin and record fluid migration during vein formation and subsequent deformation. The presence of abundant imploded inclusions in scheelite and, more rarely, in quartz reflects fluid over-pressuring synchronous with vein emplacement. Petrography combined with thermometric measurements indicate the following inclusion types: (I) LH20V with 4-19 wt.% eq. NaCl and minor amounts of dissolved carbonic species; (2) LH20 -V-Halite with 30-36 wt. % NaCl; (3) carbonic CH4and COrrich types with the latter characterized by very high densities; (4) H20-C02 with minor CH4 and 5-10 wt. % NaCl. lsochoric projections combined with homogenization temperatures indicate a potentially large range in entrapment temperatures and/or ambient fluid pressure. Analysis of 17 quartz vein samples from all structural
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 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".