Structural study of the auriferous Santoy shear zone, northeastern Glennie domain, Saskatchewan
Bibliographic record
Abstract
The study area lies within the Pine Lake Greenstone belt of the Glennie domain, 125 km northeast of LaRonge, SK. The Santoy shear zone hosts the Santoy 7, Santoy 8/8 East, and “Santoy Gap” gold deposits. This shear zone was studied using a structural and geochronological (ID-TIMS) approach in order to decipher its complex relationship with plutonism, deformation, alteration, and gold mineralization. Surface and subsurface mapping reveals that the Santoy shear zone, and deposits therein, show a clear structural relationship with the Carruthers Lake synform. The Santoy 7, Santoy “Gap”, and Santoy 8 deposits lie along the western limb of this structure while Santoy 8 East has been re-oriented by north-trending, 45°-plunging, S folds. The development of a splay off the D3 Tabbernor fault, located approximately 8 km east of the deposits, influenced the localization of strain along the western limb of the Carruthers Lake synform. This strain localization, in tandem with elevated fluid pressures, emplaced auriferous fault-fill quartz veins along ore zone parallel dykes during D3 dextral-reverse oblique slip movement. The age of the Lizard Lake pluton (1874.6 ± 2.9 Ma) and the ore zone adjacent hanging wall dyke (1874.6 ± 1.9 Ma) serves as a maximum mineralization age for these deposits. Structural relationships suggest that the Packman Lake pluton acted as a buttress during D3 deformation and produced a compressional jog in the Santoy shear zone that may have increased fracture density and fluid flow during mineralization. The age of this intrusion (1807 ± 7 Ma) serves as a maximum age for the development of this flexure. Gold mineralization at Santoy is closely associated with a calc-silicate alteration assemblage. This assemblage formed synchronously with the main stage mineralization event. Titanite and zircon within this assemblage was dated to 1755.5 ± 8.4 Ma (titanite) and 1754.0 ± 1.8 Ma (zircon) indicating syn-D3 deposit formation. A beryliferous pegmatite dyke that displays an F3 axial planar cleavage and crosscuts the auriferous ore lens at Santoy 8A has an age of 1736.1 ± 1.9 Ma. This age represents a minimum mineralization age for this system and a minimum age for regional D3 deformation in the Glennie domain.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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 teacher head, 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".