Investigation of long‐term geochemical variations and magmatic processes at <scp>M</scp>ount <scp>S</scp>t. <scp>H</scp>elens
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Abundant geochemical and petrological data are available for the 1980–1986 and 2004–2006 eruptive periods and some of the units of the most recent S pirit L ake stage at M ount S t. H elens. However, with the exception of bulk rock data, few geochemical data are available for the earlier eruptive units, including the A pe C anyon, C ougar, and S wift C reek stages. Here, the early magmatic history of M ount S t. H elens has been constrained based on chemical zonation of phenocrysts from the different eruptive units and compositions of melt inclusions determined by laser ablation‐inductively coupled plasma‐mass spectrometry ( LA ‐ ICPMS ). M ount S t. H elens has erupted adakitic composition magma over its entire 300 000 year history, beyond the most recent S pirit L ake stage as previously identified. The observed geochemical variations are consistent with fractional crystallization and do not require assimilation‐fractional crystallization to produce the observed trends. Similarly, large‐scale mixing of compositionally different magmas is not required. The source of the intermediate to felsic magmas at M ount S t. H elens appears to be metamorphosed underplated arc gabbro and geochemical trends suggest that the contribution of underplated material to M ount S t. H elens magma has decreased in the modern period.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 it