Geology, geochemistry and geochronology of the Hemlo East property, Schreiber-Hemlo Greenstone Belt, Ontario
Bibliographic record
Abstract
The Hemlo East property is located approximately 50 kilometres east of the \ntown of Marathon, Ontario and is situated within the Schreiber-Hemlo greenstone belt \nof the Wawa-Abitibi Terrane of the Archean Superior Province. Lithologies within the \nHemlo East Property are broadly divided into mafic metavolcanic, felsic metavolcanic, \nmetasedimentary, intrusive and metaintrusive rocks. Stratigraphic continuity within \nthe study area is demonstrated by the large number of drill holes in the area. Rock \nstaining indicates that the K-feldspar present in felsic metavolcanic rocks in the \nGouda-Thor-Carroll area of the Hemlo East Property is a product of alteration likely \nassociated with base metal and gold mineralization. \nNew major and trace element, Sm-Nd isotope, and geochronology data are \npresented for volcanic, plutonic, and metasedimentary rocks of the Hemlo East \nproperty to investigate their origins. Positive to negative ?Nd (-1.14 to 2.15) for tholeiitic \nbasalts indicate that they were derived from depleted to moderately contaminated \nsources. FI rhyolites with steep trace element patterns (La/Ybn = 16 to 44) and \nfractionated HREE (Gd/Ybn = 2.1 to 7.5) are interpreted to have been derived from a \ndeep mantle source. Metasedimentary rocks are geochemically similar to felsic \nmetavolcanic rocks and are interpreted to be derived wholly, or in part, from a felsic \nsource.
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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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".