Geochemical evolution of the New England lamprophyre suite: a hotspot signature preserved in the continental crust?
Bibliographic record
Abstract
Hotspots provide a means of investigating the physical and chemical evolution of the Earth's interior. Although we have successfully addressed many of the major questions concerning the deep mantle by studies of ocean island basalts, these investigations are limited by both inaccessibility to the full trace of magmatism on the ocean floor and the disappearance of the record of this magmatism by subduction after several hundred million years. Identification of uncontaminated fossil hotspot traces on the continents may allow us to study deep mantle samples that span the convective history of the Earth. Volatile-rich magmas, erupted quickly through the crust, may provide the best opportunity to sample primitive, uncontaminated deep mantle compositions. The lamprophyre dikes of the New England -Quebec igneous province, continuous in both time and space with the New England Seamounts, provide an ideal location in which to investigate the possibility that mafic alkaline volcanism represents the surface expression of the passage of a hotspot beneath continental crust. Lamprophyres are found on every continent and have erupted at least since the late Archean. Contrary to common opinion, they are not rare, volumetric ally insignificant, or hopelessly altered.
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How this classification was reachedexpand
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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 teacher head, 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".