Character and Genesis of Indium Mineralization, East Kemptville, Nova Scotia
Bibliographic record
Abstract
The East Kemptville deposit is a Sn-polymetallic greisen deposit that is a known host of indium mineralization, an important element in high-technology applications. Indium mineralization occurs primarily as a minor or trace element in sulfide minerals, with sphalerite and chalcopyrite being the most abundant of these. These indium-bearing sulfides are associated with greisen and quartz-sulfide vein mineralization in the Main and Baby zones. It has been previously proposed that these two different mineralization styles are related to different paragenetic events, with the quartz-sulfide vein mineralization being further subdivided into two broad temporal events. Mineral textures and mineral chemistry of indium-bearing sulfides indicate that the concentrations of indium are similar between the two main mineralization styles and the two ore zones. The compositional similarity among indium-bearing sulfides and lack of any temporal or spatial differences in the composition of the sulfide minerals, indicates that the fluids responsible for indium enrichment formed from a common fluid source and under relatively constant physicochemical conditions. Mineral geothermometry indicates a temperature range of 230 to 275 °C for sphalerite-stannite mineralization. Sulfur isotope data from secondary ion mass spectroscopy (δ34 S = 2.1-7.9 ‰; spatial resolution of 5-15 μm) represent a larger range of values compared to mineral separates (δ34S = 4.9-7.0 ‰) and suggest that a magmatic fluid interacted with the surrounding metasedimentary country rocks. Differences in gangue mineralogy reflect the nature of the local wallrocks, which indicates that the mineralizing fluids equilibrated with the wallrocks and that the system was partially rock buffered. In addition to the indium-bearing mineralization, East Kemptville also contains a late indium-poor breccia. The characteristics of indium mineralization at the nearby Duck Pond deposit are similar to those of East Kemptville, suggesting a similar genesis.
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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 | 0.001 |
| 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 | 0.001 |
| Scholarly communication | 0.001 | 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".