Variations In Cascade Arc Magmatism Through Space And Time; A Comparison Of Geochemical And Geographic Trends In Volcanic And Plutonic Rocks From The Chilliwack-mt. Baker And Fifes Peaks-bumping Lake Areas, Washington
Bibliographic record
Abstract
Volcanic and plutonic rocks of the Cascade arc extend from northern California to British Colombia and preserve a record of subduction-related magmatism over the past approximately 44 Ma. During this interval the arc has experienced variations in several parameters that have the potential to influence magmatism including the rate of subduction, the age and volatile content of the subducting plate, and the stress regime, thickness and composition of the overlying continental crust. This study compares spatial and temporal patterns of magmatic activity in two areas of the Washington Cascades with the goals of: (1) identifying trends that may be related to changing subduction parameters, and (2) contrasting the records of plutonic versus volcanic rocks. The two areas under study are the Chilliwack-Mt. Baker area (CMB), which includes >40 plutons of the Chilliwack batholith (35 Ma to 40, Y < 15 ppm) and define a younger-to-the-SE progression. The presence of adakites in the FPBL but not the CMB may reflect a difference between the two areas in the age of the subducting slab. Preliminary results of this study suggest that many of the temporal and spatial trends observed in CMB and FPBL are strongly influenced by local variations in subduction parameters including slab age and geometry.
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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".