The multi-phase Keele Arch, central Mackenzie Corridor, Northwest Territories
Bibliographic record
Abstract
Abstract Keele Arch is a zone of anomalous structural, erosional, and depositional features along a corridor east of the Colville Hills and the northern Franklin Mountains, Northwest Territories, a region with significant economic potential. First described in 1975, it has since been found to have had a long history of uplift-to-sag reversals. This report presents a series of maps and sections, based largely on flattened reflection seismic lines that illustrate key stages of the arch’s development through time and space. In doing so it lays the foundation for future assessments of the arch’s influence on the surrounding stratigraphy. Preceded by a late Proterozoic syncline, it evolved through five major stages: 1) subsidence into a chain of Cambrian to mid-Ordovician grabens; 2) uplift of its central and southern zones to form a Late Silurian (pre-Devonian) arch; 3) renewed uplift into a pre-Cretaceous arch between the region east the Colville Hills and the Mackenzie River valley near Johnson River; 4) mid-Cretaceous reactivation of the pre-Cretaceous and southern pre-Devonian arches; and 5) subsidence of its central zone into Brackett Basin during the late-Campanian to Paleocene and inversion of the Cambrian McConnell Graben into the McConnell Range during late-Campanian to Paleocene time. The feature can be divided into four parts: 1) A northern segment between the Northern Franklin Mountains and the region east of the Colville Hills; 2) The north half of its central zone, where Cambro-Ordovician strata are exposed east of the northern Franklin Mountains; 3) The southern portion of the central zone between Brackett Lake and Keele River, where Tertiary rocks lie at the surface. This is the best documented and most tectonically active segment; and 4) a poorly understood segment under Mackenzie Valley, south of Keele River.
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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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".