Volcanic architecture and alteration assemblages of the Ming Cu-Au-(Zn-Ag) VMS deposit, Baie Verte, Newfoundland and Labrador: implications for Au-enrichment processes and exploration
Bibliographic record
Abstract
The Ming deposit is hosted in Cambro-Ordovician intermediate to felsic rocks underlain by ca. 490 Ma ophiolite slivers of boninitic composition. The deposit consists of five elongated semi-massive to massive sulphide lenses that plunge 30o to the northeast and occur in the uppermost part of a calc-alkalic intermediate to felsic volcanic succession. The immediate hanging wall varies from mafic volcanic breccia to magnetite- rich volcanogenic siltstone. Three generations of mafic to intermediate intrusive rocks are present in the deposit; they each have distinctive lithogeochemical signatures and are interpreted to be genetically related to the mafic rocks of the cover sequence. The Ming deposit has seven distinct alteration mineral assemblages (from proximal to distal from mineralization): quartz-pyrite, quartz-calcite-garnet, sericite-green mica-sulphide, sericite-quartz-pyrite, chlorite- amphibole-quartz, chlorite-sericite-quartz-sulphide, and chlorite-stringer zone assemblages. A chalcopyrite- pyrrhotite-pyrite stringer zone associated with the chlorite-stringer zone assemblage occurs 50-100 m stratigraphically below the Ming North and Ming South lenses, at what was the site of high-temperature fluid discharge from a hydrothermal system. The spatial and temporal geological relationships between the stratigraphic package, alteration styles, mineralization, and deformation strongly support a syngenetic origin for mineralization and Au-enrichment.
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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 | 0.001 |
| 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".