Surficial geology, Contwoyto Lake, Northwest Territories-Nunavut
Bibliographic record
Abstract
Ongoing geological exploration and related infrastructure development in central and northern Slave Geological Province have resulted in the need for a wide range of baseline information. In response, Terrain Sciences Division initiated regional surficial geology mapping through the Slave Province National Mapping Program (NATMAP) to provide fundamental regional data on surficial materials and till geochemistry. In 1994, Terrain Sciences Division undertook mapping of the south half of the Contwoyto Lake map area (NTS 76E). As an extension to Slave NATMAP, surficial geology mapping continued in 1996 in the north half of the Contwoyto Lake map area, east and north of recently mapped 1:250 000 sheet (Kerr et al., 1995, 1997a). The project involved helicopter-assisted ground work including terrain mapping, till sampling, pebble provenance studies, measurement of ice flow indicators, and recording permafrost features. Field traverses and airphoto interpretation provided information on the nature and distribution of surficial materials shown on the map. Till samples (1 Kg) were collected from hand-dug pits at 219 sites for textural analysis and trace element geochemistry; 52 bulk till samples (10 Kg) were collected for regional kimberlite indicator mineral analysis and gold grain analysis; pebbles (2 to 6 cm diameter) were collected from the till sample pits to assess glacial transport distances and ice flow patterns. Surficial geology was plotted on 1:60 000 scale airphotos and recompiled at 1:125 000 on a topographic base. This map supersedes previous surficial geology maps of this area (Hart et al., 1989; Ward et al., 1995; Kerr et al., 1997b). Ward et al. (1996a, b), Kerr et al. (1998, 1999) present the results of regional till geochemistry and kimberlite indicator mineral analyses. The regional glacial geology was first presented by Blake (1963). Subsequent bedrock mapping projects included brief comments regarding glacial geology (Bostock, 1966, 1980; Tremblay, 1966, 1967, 1976), and associated reconnaissance till geochemistry in the Lupin area is summarized in Coker et al. (1992).
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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 | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 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) | 0.006 | 0.001 |
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".