Geophysical modelling of the Neoarchean Woodburn Lake and Paleoproterozoic Ketyet River groups, and plutonic rocks in central Schultz Lake map area, Nunavut
Bibliographic record
Abstract
Uranium exploration in the Thelon Basin has been has been revitalized by developments and discoveries reported by AREVA Resources Canada and Cameco Corporation in structurally intercalated metasedimentary and metavolcanic rocks of the Neoarchean Woodburn Lake group and early Paleoproterozoic Ketyet River group south and east of the Aberdeen Subbasin. This study integrates geophysics and geology to model a proposed basement klippe located south of Schultz Lake in central NTS map area 66A. Orthogonal high-resolution ground gravity transects were acquired in 2010, based on initial definition of the structure by a published 2004 geological map. These were integrated with high-resolution aeromagnetic and electromagnetic data from Forum Uranium Corporation, CanVec topographic data, and initial detailed geological observations in 2010 to 2011 by parallel studies under the Northern Uranium for Canada Project, part of the Geomapping for Energy and Minerals (GEM) Program The subsurface geology was computed by integrating surface geological contacts, unconstrained geophysical inversions and forward models. The unconstrained magnetic inversions defined several dyke arrays and suggest a deep seated mafic-to-felsic pluton tentatively assigned to the 2.6 Ga Snow Island Suite. High-resolution electromagnetic data provide strong constraints on near-surface lithology and steeply dipping faults, discriminating between Paleoproterozoic quartzite, Paleoproterozoic grey schist, and Neoarchean arkosic metagreywacke. The forward models, primarily constrained by generic rock properties and the clear gravity signal, support the klippe hypothesis. Further improvement could be achieved with a detailed gravity grid and more site-specific rock properties, and through collaborative integration and feed-back analysis of the full structural mapping data set.
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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) | 0.001 | 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) | 0.001 | 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 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".