Geochemical maturity of pocket beach sands from the San’in region of southwest Japan
Bibliographic record
Abstract
Major and trace elements of ninety-two coastal beach sands samples, collected along the San’in region of southwest Japan, were determined by X-ray fluorescence to define their geochemical characteristics. These included Yamaguchi (n=27), Shimane (n=50), and Tottori (n=15) beach sands samples. Data of beach sands from Shimane and Tottori normalised averages show approaching patterns relative to the upper crust of the Japan arc UCJAN, and upper continental crust UCCN, reflecting the composition of the source rocks that dominate their watersheds. In contrast the normalised patterns for most elements of Yamaguchi beach sands samples are less than 1 except for CaO, Sr, and Th. The primary component of beach sands from Shimane is quartz, or silica (SiO2), Sands from Tottori are composed essentially of weathered particles of feldspar, and in contrast components of biogenic and quartz-rich sands from Yamaguchi are primarily shell fragments, quartz, and igneous rock.
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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".