The nature of the Cadillac – Larder Lake Fault: Implications for gold mineralization along the KerrAddison-Cheminis segment
Bibliographic record
Abstract
The Cadillac-Larder Lake Fault (CLLF) is a major fault system that controls the location of gold deposits in the southern Abitibi greenstone belt. Over a distance of 250 km from Matachewan in Ontario to Val d’Or in Quebec, it marks the contact between mafic-ultramafic volcanic rocks of the Piché/Larder Lake group and younger metasedimentary rocks of the Hearst, Timiskaming and Cadillac sedimentary assemblages. In the Larder Lake area, the contact between sedimentary rocks of the Timiskaming assemblage to the north and volcanic rocks of the Larder Lake group to the south defines the CLLF. This contact is typically sheared and deformed by two generations of folds but locally, in areas of low strain, an unconformity is preserved, expressed by a pebbly sandstone which youngs away from the underlying ultramafic rocks and contains detrital clasts of the ultramafic rocks. The sandstone stratigraphically overlies older volcanic rocks of the Larder Lake group suggesting that the unconformable contact between the Timiskaming assemblage and Larder Lake group is a primary feature that was later structurally modified. The structural history of the CLLF and surrounding rocks began prior to the deposition of the Timiskaming assemblage with the juxtaposition of the Larder Lake and Blake River groups during an early thrusting and imbricating D1 deformation event. Both the Larder Lake group and the Timiskaming assemblage were then deformed during a D2 deformation / mineralizing event, which produced regional F2 folds, a regional S2 cleavage, and ductile shearing along the contact between the Larder Lake group and the Timiskaming assemblage. Reactivation of this contact during and post the D2 event localized the distribution of gold deposits and formed the present day manifestation of the CLLF.
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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 | 0.002 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 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".