Sedimentary-rock-hosted Zn-Pb deposits of the Maritimes Basin, Atlantic Canada. Comparison with Irish-type, MVT and SedEx/CD deposit models
Bibliographic record
Abstract
The Mississippian (Visean) Windsor Group of Atlantic Canada consists of a lower carbonate unit overlain by a thick succession of evaporite, clastic, and carbonate rocks. It hosts numerous Zn-Pb deposits, including the Scotia (formerly Gays River deposit), Walton and Jubilee deposits in Nova Scotia, and a number of occurrences on the Port au Port Peninsula, Newfoundland. Geological and geochemical studies show that these deposits share a number of important characteristics, including location on the flanks of sub-basins in carbonate rocks at the base of the Windsor Group, strong structural control on mineralization, and metalliferous fluids sourced from the underlying basement rocks. Despite these similarities, there is significant inter-deposit heterogeneity, and individual deposits can be classified as typical MVT or SedEx/CD, or deposit types transitional between these end-member types (akin to Irish-type deposits in the Irish Midlands) based on conditions at the site of mineralization. It is best to describe the mineralizing system responsible for the formation of these deposits using a mineral-system approach, focussing on regional-scale characteristics such as triggers for mineralization (e.g., edge-driven convection during transtensional tectonics) and favourable crustal architecture to transport metalliferous fluids to suitable mineralization sites. Ongoing research using state-of-the-art geochronological and geochemical techniques aims to advance the understanding of the timing and nature of mineralizing processes in the sedimentary rock-hosted Zn-Pb deposits of the Maritimes Basin.
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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 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| 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".