Bibliographic record
Abstract
The bedrock of the Dubawnt Lake area mainly consists of late Archean (2.6 Ga) granite to diorite plutons, which intruded schist and gneiss (greater than or equal to 2.7 Ga), all overlain by early Proterozoic (1.85-1.7 Ga) siliciclastic and volcanic rocks of the Dubawnt Supergroup. Granitic plutons were emplaced on the east side of the area at ca. 1.83 and 1.76 Ga. The northwest-trending, leucocratic, and dominantly granitic Snow River gneiss is the oldest map unit. It is overlain by metapsammitic and schistose rocks with minor mafic volcanic rocks (Clarke River schist) which record at least one deformation event at upper amphibolite facies that predates 2.6 Ga. Both units were intruded by diorite, granodiorite, megacrystic monzonite, and leucogranite of the Snow Island suite, dated at 2.602-2.605 Ma. Quartzite and minor siltstone, preserved as erosional remnants in a discontinuous northeast-trending belt, were deposited on Archean basement before 1.83 Ga, and are correlated with the Aphebian Amer Group. The quartzite units contain a shallowly southeast-plunging stretching lineation, formed during upper greenschist- to lower amphibolite-facies metamorphism, which predates the Dubawnt Supergroup. The lowermost Dubawnt Supergroup (basal Christopher Island Formation) consists of minor immature sandstone and conglomerate, and extensive flows of felsic, potassic lavas that were erupted directly onto Archean/Aphebian basement. These were transected by narrow strike-slip and normal fault valleys that were filled with mafic to felsic ultrapotassic volcanic and volcaniclastic rocks, overlain by fluvial/alluvial siliciclastic deposits of the Kunwak Formation. Ultrapotassic volcanism was probably synchronous with the emplacement of granitoid plutons of the Hudson suite (ca. 1.83 Ga) within the Snow River gneiss domain. A felsic minette flow yielded a zircon U-Pb age of 1833 ± 3 Ga, and volcanism was probably synchronous with the emplacement of Hudson granitoid plutons within the Snow River gneiss domain. At ca. 1.75 Ga, the eastern side of the map area was intruded by rapakivi granite (Nueltin granite). Minor rhyolite domes of the correlative Pitz Formation (middle Dubawnt Supergroup) are preserved. A period of erosion and intense chemical weathering was followed by deposition of flat-lying conglomerate and sandstone of the Thelon Formation (upper Dubawnt Supergroup) at about 1.72 Ga; a major depocentre lay to the west, under the present Thelon basin. The youngest event recognized is the emplacement of northwest-trending diabase dykes of the Mackenzie swarm at 1.72 Ga.
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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) | 0.005 | 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".