Understanding New Trends on Gold Mineralization at the Yellowknife City Gold Project, Northwest Territories, using Synchrotron X-ray Spectroscopy
Bibliographic record
Abstract
The Yellowknife City Gold Project (YCGP) currently encompasses 780 sq. km of contiguous land north, south and east of the city of Yellowknife. The project lies in the prolific Archean north-south trending Yellowknife Greenstone Belt, a suite of mafic and felsic volcanics and greywacke turbidites overlying a gneissic basement. Exploration and drilling efforts have been focused along 70 km of strike length on the southern and northern extensions of the mineralized shear zones and quartz veins associated with the past-producing high-grade Con (6.1 Moz @ 16.1 g/t Au) and Giant (8.1 Moz @ 16.0 g/t Au) gold mines.\nSynchrotron X-ray diffraction of 71 powdered samples, and X-ray fluorescence maps of 73 slabs and half cores reveal similarities in mineralization styles between the Northbelt Property and the Con-Giant Mines, such as presence of pyrite-arsenopyrite, sphalerite-galena, sericite, chlorite, and quartz-carbonate, hinting that both locations are derived from a single mineralizing system. Our results suggest the timing of mineralization is similar throughout the Yellowknife City Gold Project, with pyrite-arsenopyrite, and sphalerite-galena forming first, followed by sericite-chlorite, and quartz-carbonate veining proliferating last. Three main gold associations are present across the YCGP – gold+sulphide, gold+quartz-carbonate, and gold+sericite-chlorite with the two latter probably due to later remobilization during syn-mineralization metamorphic processes. XANES analyses of select samples with viable Au signals revealed the presence of only metallic Au within sulphides and quartz veins. No refractory gold associated with elevated arsenic levels has been observed, suggesting gold may be easier to recover than previously thought.
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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 | 0.000 | 0.001 |
| 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".