Preliminary 3D Geophysical Modeling of the Aberdeen Sub- Basin, Thelon Province, Nunavut
Bibliographic record
Abstract
Summary The Paleoproterozoic Thelon Basin, transecting the border of Northwest Territories and Nunavut, is both tectonically and stratigraphically similar to the Athabasca Basin, known worldwide for its unconformity-associated uranium deposits. This poster reports a compilation and interpretation of the existing geophysical and geological data for the Aberdeen Sub-Basin located in the northeastern part of the Thelon Basin. Limited seismic profiling along with sparse borehole data permits only broad scale regional models of the sub-basin. An improved version of the unconformity surface between the Thelon Formation and underlying basement is derived by integrating 2D forward modeling of the regional scale gravity and aeromagnetic data. Limited geological constraints on the forward models are provided by borehole logs, seismic shot points and physical property attributes from the Kiggavik deposit and Athabasca Basin. The resulting depth to basement model invokes a more magnetic and dense basement which is unconformably overlain by non-magnetic and less dense siliciclastic strata of the Thelon Formation. Integration of the results of the model cross-sections in 3D suggests that the Aberdeen Sub-Basin is deeper than previously thought. Aeromagnetic data demonstrate high potential for lithological interpretations. The gravity and aeromagnetic models set the stage for acquiring new basic petrophysical and borehole constraints to map basement rock units and structure beneath the Thelon 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 | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| 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".