Pop-ups and related damage in granite at the Medika Pluton in southeastern Manitoba
Bibliographic record
Abstract
Stress relief in the form of small displacements and a pop-up has occurred in a line-drilled, blast-free quarry in Archean granite 100 km east of Winnipeg. A 60 m by 19 m and up to 1.5 m thick block, forming the east wall of the quarry, has undergone deformation and displacement following quarrying. The pop-up base is a low-dipping exfoliation fracture that predates the quarry. Block movement is complex, with compressional, strike-slip, and extensional features observed around the damaged zone perimeter. Overall, block displacement and expansion are dominated by upslope thrusting. The northeast–southwest displacement of the postexcavation damage zone mimics that of a nearby pre-quarry pop-up. The orientation of the maximum horizontal in situ compressive stress, σh max, inferred from the postquarry pop-up is consistent with on-site overcoring results. The compressional origin of the quarry-induced low-dip thrust fault and pop-up and the predominant orientations of these structures are compatible with the ambient stress field in eastern North America. This indicates that, although the quarry initiated and localized the damage zone, the regional in situ stress field defines its geometry and relative displacement.
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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 | 0.001 | 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".