Carboniferous and Permian subsurface stratigraphy, Prince Patrick Island, Northwest Territories, Canadian Arctic
Bibliographic record
Abstract
The Carboniferous and Permian succession of the Sverdrup Basin is extensive in the subsurface of northern Prince Patrick Island of the Canadian Arctic Archipelago, Northwest Territories. The succession is known from a series of seismic profiles and four exploratory wells drilled during the early 1970s. Upper Paleozoic strata are characterized by two broad packages. The lower package comprises Carboniferous to Lower Permian clastic and carbonate rocks truncated by a number of northwest southeast-trending synsedimentary normal faults. The upper package is composed of Middle Permian (Guadalupian) clastic rocks that were deposited during a regime of passive subsidence following the cessation of faulting. These strata are separated from the underlying Lower Permian and Carboniferous succession by a widespread and locally angular unconformity. Eleven upper Paleozoic formations have been identified on Prince Patrick Island: Borup Fiord, Canyon Fiord, Belcher Channel, Nansen, Raanes, Hare Fiord, 'unnamed clastics', Trappers Cove, Sabine Bay, van Hauen, and Trold Fiord. The succession contains eight major unconformities that can be correlated over a significant area. Five of these unconformities were encountered in three of the drilled wells. Three additional unconformities were observed on seismic profiles only. The eight unconformities and the seven transgressive regressive sequences between them have been traced seismically using a series of profiles. The ages of these sequences are Serpukhovian(?), Bashkirian Kasimovian, Gzhelian Sakmarian, Sakmarian Artinskian, Kungurian, Roadian Wordian and Capitanian(?). The Carboniferous and Permian geological history of Prince Patrick Island includes a complex succession of events whereby tectonic pulses, as evidenced by brittle deformation, alternated with episodes of tectonic quiescence and passive subsidence. Climatic conditions evolved from warm and relatively arid during the Bashkirian Sakmarian interval to increasingly cooler during the Artinskian Capitanian(?). More humid conditions were also established during the Kungurian. A major river system fed the Prince Patrick area with large amounts of clastic material during the Artinksian Guadalupian interval. The current geological setting of the area suggests the presence of many unexplored oil and gas plays. Unfortunately, the succession lies too deeply in the subsurface to envision any mineral exploration effort in the future.
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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 | 0.002 | 0.004 |
| Science and technology studies | 0.004 | 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) | 0.003 | 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".