Character of age distribution of precambrian detrital zircons in the section of the Yuryuzan-Sylvenskaya basin of the Uralian Foredeep based on U–Pb LA– ICP–MS isotopic dating — single source demolition indicator
Bibliographic record
Abstract
The Yuryuzano-Sylvenskaya depression is part of the Uralian foredeep. It is filled with flysch-molasse complexes in the interval from the Moscovian stage of the Middle Carboniferous to the Artinskian stage of the Lower Permian. Nine samples were taken from different levels of the section to isolate and date detrital zircons. Of particular interest is the distribution of Precambrian ages in these zircons. From bottom to top, the amount of Precambrian zircons generally decreases from 97% to 4%. At the same time, the age distribution spectra of these zircons coincide throughout the section, which suggests a single source for them. In addition, these spectra are practically indistinguishable from the spectrum of zircons of the Asha series of the Vendian Bashkir megazone, which, apparently, is the source of Precambrian zircons of the Upper Paleozoic suites of the Yuryuzan-Sylvenskaya depression. It was a permanent element of the provenance area for the Upper Paleozoic suites of the Yuryuzano-Sylvenskaya depression. The Riphean rift complexes of the Bashkir megazone and the Archean-Early Proterozoic complexes of the Taratash ledge were not included in the provenance area.
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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 | 0.001 |
| 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) | 0.001 | 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".