Lithological and structural controls on the nature and distribution of gold at the LaRonde Zone 5 project, Doyon-Bousquet-LaRonde gold camp, Abitibi, Quebec
Bibliographic record
Abstract
The LaRonde Zone 5 (LZ5) is in the Doyon-Bousquet-LaRonde mining camp (DBL), eastern Blake River Group, Abitibi greenstone belt. LaRonde Zone 5 and the satellite zones 4 and 4.1 are hosted within steeply south-dipping (80-90°) and south-facing volcanic and volcaniclastic units (mafic to felsic tuff and lapilli tuff) of the lower member of the Bousquet Formation. The mineralization of all three zones consists of discordant networks of millimetre to centimetre thick pyrite±chalcopyrite veinlets (10-20 volume %) and, to a lesser extent, of very finely disseminated pyrite (1 volume %) in chlorite-carbonate-sericite alteration zones. Gold is present as microscopic inclusions in fine-grained granoblastic pyrite in both the veinlets and disseminations. The study area was affected by major tectonic deformation and the mineralized zones were intensely transposed into the steeply dipping, east-trending penetrative foliation. Uncertainty remains about the exact timing of gold mineralization, deformation, and metamorphism. Also, the style of mineralization at LZ5 (pyrite±chalcopyrite veins and vein-lets, ± disseminated pyrite) and its setting (mafic-intermediate rocks of the lower member of the Bousquet Formation) largely differs from most of the ore in the rest of the DBL, which is considered to be synvolcanic. Ongoing research at LZ5 aims to document the ore styles and setting, establish the relative timing of events, compare mineralization with the other ore styles of the camp and contribute to the metallogenic models for Archean gold deposits in the southern Superior Province.
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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 | 0.001 | 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".