New U-Pb zircon ages from the Flin Flon Targeted Geoscience Initiative Project 2006-2009: Flin Flon and Hook Lake blocks, Manitoba and Saskatchewan
Bibliographic record
Abstract
New geochronological results indicate that the predominant age of Flin Flon block volcanism is ca. 1890 Ma. A volcanic breccia within the Millrock member yields a maximum age of 1889 ± 9 Ma. A rhyolite flow at Millrock Hill yields a crystallization age of 1888.9 ± 1.6 Ma. The age of rhyolite at the Flin Flon mine South Main shaft is revised to 1887.1 ± 2.2 Ma. Lapilli tuff at Hilary Lake is dated at 1886 ± 4 Ma. A weakly foliated intermediate dyke is dated at 1872 ± 7 Ma, indicating early deformation. A porphyritic leucocratic granite dyke provides a minimum age for post-Missi folding of 1840 ± 8 Ma north of the Club Lake fault. The maximum age of shearing is constrained by a felsic dyke at 1839 +6/-2 Ma. The western sequence of the Hook Lake block is constrained by a crystallization age of 1891 ± 17 Ma and a minimum age of 1888.1 ± 0.9 Ma. Altered rhyolite from the eastern sequence is dated at 1882.0 ± 1.0 Ma.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.004 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".