RECENT HIGH-DENSITY LAKE-SEDIMENT AND WATER SURVEYS IN CENTRAL LABRADOR
Bibliographic record
Abstract
During 1998, high-density lake-sediment and water-geochemical surveys were conducted in four areas of central Labrador. Samples were collected from 940 sites in areas regarded as prospective for Ni, Cu, and possibly Au mineralization. The Wilson Lake area has high values of Ni and Cu in the lake sediment, and in several known sulphide occurrences, but has been little explored; it is underlain by paragneiss and mafic gneiss. The Seal Lake area, which is underlain by mafic volcanic and high-level intrusive and clastic sedimentary rocks, has been extensively explored for Cu and has many known prospects; the present survey expands the focus of previous exploration activity. The Harp Lake area is mainly underlain by anorthosite and related rocks. The area surveyed is distinguished by having elevated values of Cu and Ni in reconnaissance lake-sediment data. Over 23 sulphide occurrences are already known within the survey boundary. The Pants Lake intrusion area contains the best known analogue of Voisey's Bay-style mineralization in Labrador. The Ni–Cu–Co mineralization is widespread, occurring in the basal portion of the layered, sheet-like, gabbroic Pants Lake intrusion. Results of the current high-density lake surveys identify, in addition to most known mineral occurrences in the four areas, several watersheds without known mineralization. The Wilson Lake area contains a strong elongate Ni anomaly. The Seal Lake area has several lakes that have high Cu content in water and/or sediment without known mineralization. The Harp Lake area survey identifies three lakes having anomalous Cu in sediment and two areas that have anomalous Ni content in water without corresponding known mineralization. Two new exploration target areas are identified in the Pants Lake survey area. An area with several samples of lake water having high Ni values is outside the main exploration area and an adjacent pair of lakes having anomalous Au and Sb is located several kilometres to the east of the base-metal exploration area in a region underlain by Archean gneiss.
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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 | 0.001 | 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) | 0.002 | 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".