Bibliographic record
Abstract
ABSTRACT Granites are important components of the Earth's continental crust and represent the net effect of thermochemical processes that operate during partial melting, magma extraction, ascent, emplacement and crystallization. Compositional and isotopic variations in granites arise from source heterogeneities, mixing in the source, and peritectic mineral entrainment as well as crystal fractionation and assimilation. Fluid-absent hydrate-breakdown melting reactions that accompany high-temperature metamorphism are responsible for differentiating the continental crust into a granitic upper portion and a residual lower portion. In some cases, melting can proceed through the influx of a hydrous fluid, although the significance of this on the long-term compositional differentiation of the continental crust is debated. Accessory minerals in granites are important chronometers and play a primary role in transferring the radiogenic isotope signature of sources to granites. Magma ascent and emplacement are guided by deformation and pluton construction is expected to be incremental with pluton heterogeneity being related to the interaction and differentiation of individual magma batches, as well as the extent to which melt separates from solid residual source material. The nature of the source plays a crucial role in the concentration of water and volatiles that are essential for the generation of hydrothermal–magmatic mineral deposits. Future studies of granites using non-traditional stable isotope systems are expected to provide new insights into the evolution of Earth’s continental crust.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.003 | 0.001 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.035 | 0.011 |
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".