Petrographic analysis of fault rock structures from Notre Dame Bay, Newfoundland, Canada
Bibliographic record
Abstract
This study investigates fault rocks in the Leading Tickles area of Notre Dame Bay Magmatic Province (NDBMP), Newfoundland, Canada. The NDBMP consists of alkaline mafic intrusions, and the Leading Tickles region is characterized by radial lamprophyre dykes, Leading Tickles Stock and Budgell’s Harbour Stock, which fold and fault the surrounding Ordovician host rocks. This region is within an eastern peri-Gondwanan exploits subzone which was affected by the Appalachian orogenic events including the Taconic, Salinic and Acadian orogenies. The primary objectives of this study were to examine fault rock deformation processes, investigate interactions between the fault rocks and lamprophyre dyke fragments, and examine fault rock kinematics and reactivation. This thesis presents a petrographic analysis of two fault rock samples collected from Cull Island, near the town of Leading Tickles in NDBMP. The first sample is identified as a non-foliated Protocataclasite, displaying features of both brittle and ductile deformation, consistent with formation in the brittle to ductile transition zone and late-stage fluid infiltration. The second sample is classified as a non-foliated mosaic fault breccia, indicative of brittle deformation at shallower crustal levels in a fault zone with late-stage carbonate infiltration. The absence of lamprophyre dyke fragments within the samples suggests faulting processes predate the dyke intrusion. In addition, the observed fault rocks are likely related to the Luke’s Arm Fault Zone (LAFZ), which crosses the study area, and may reflect broader fault reactivation along Newfoundland’s margin during the Mesozoic.
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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 | 0.003 | 0.003 |
| Science and technology studies | 0.003 | 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) | 0.012 | 0.003 |
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".