Structural geology of the Penobsquis salt structure: late Bashkirian inversion tectonics in the Moncton Basin, New Brunswick, eastern Canada
Bibliographic record
Abstract
This study uses new information acquired from field mapping, mineral exploration boreholes, and seismic reflection profiles to constrain the structural geology, deformation mechanisms, and timing of the Penobsquis salt structure. This information is used to place the development of the salt structure into the context of the tectonic evolution of the Moncton Basin. The Penobsquis salt structure is an elongate salt wall separated from underlying rocks by a mylonitic detachment horizon. It may be divided into two segments: a southwestern asymmetric, southeast-verging structure and a northeastern strongly asymmetric to overturned, southeast-verging structure associated with the Penobsquis fault. An initial low-amplitude salt anticline formed during deposition of the Mabou Group (Serpukhovian time). The salt anticline was modified into a high-amplitude salt wall after deposition of Cumberland Group sediments (early Bashkirian or later). The sense of asymmetry of the Penobsquis salt structure, the presence of thrust faults within the structure, the spatial association of the structure with a major reverse fault in the salt cover, and the temporal association of salt movement and compressional tectonic events suggest that the salt structure developed in response to tectonic contraction during inversion of the Moncton Basin.
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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 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 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".