Bibliographic record
Abstract
The Cornwallis Zn-Pb district in the Canadian Arctic archipelago contains numerous carbonatehosted mineralised showings, including the past-producing Polaris Zn-Pb mine on Little \nCornwallis Island. The showings’ mineralogy is primarily Zn-Pb, with anomalous Cu showings. \nThe volume and geographic/stratigraphic positions of mineralisation are variable, with the \nmajority being hosted by Middle Ordovician Thumb Mountain Formation limestone/dolostone \nadjacent to extensional faults. Multiple in situ micro-analytical techniques were used on samples \nfrom throughout the district to determine the origin, character, flow path, and age of the \nmineralizing fluid(s) responsible for the showings in the district, and to re-evaluate models of the \nPolaris deposit. \nGeochemical (fluid inclusion microthermometry, trace and rare earth elements, oxygen isotopes) \nresults indicate that a single, regional fluid was involved in mineralisation at all of the showings. \nSulphur isotopes indicate that pre-mineralisation sulphur accumulations at individual showings \naffected early mineralisation δ34S values until thermochemical sulphate reduction (TSR) of the \nregional fluid became the dominant sulphur supply, and that varying degrees of TSR completion \nresulted in showing-specific δ34S values, rather than a uniform regional value. The main control \non the volume of mineralisation was the amount of fluid flux that could be accommodated by the \nshowing, with Polaris being much larger than the rest because of its tectonic location, which \nallowed for copious amounts of mineralising fluid to interact with host rocks. The Storm copper showing on Somerset Island indicates that Cu showings in the Zn-Pb district \nare related to the regional fluids of the Zn-Pb showings, but local strata affected the mineralogy. \nThe geochemical signatures of the paragenetic stages indicate that pre-ore fluids were related to \nthe regional Zn-Pb fluid, whereas the main-ore fluid is related to a fluid that displaced the \nregional Zn-Pb-mineralising fluid during ongoing orogenesis. An underlying Proterozoic redbed \ncontains a record of diagenetic sequences and fluids that is similar to those responsible for the \nStorm copper showing, indicating that the geographically limited redbed was probably \nresponsible for the anomalous Cu-rich showing in the district.
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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 | 0.002 | 0.002 |
| Science and technology studies | 0.005 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".