Hydrothermal Vesuvianite: A U-Pb Dating Mineral
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Since mineral deposits are the products of multiple hydrothermal pulses, in many circumstances, selecting a robust mineral to date the different mineralization events precisely is important. Vesuvianite, usually known as a rock-forming or accessory silicate mineral typically found in metasomatic and regional metamorphic calcsilicate rocks, has the potential to be a dating mineral. Vesuvianite crystallized entirely from saturated boiling hydrothermal fluid has not been previously reported. Here, we report a new occurrence of hydrovesuvianite, which yields a reliable U-Pb isotope age, is associated with quartz and zircon in hydrothermal veins in central Madagascar. The hydrovesuvianite and associated minerals entirely crystallized from a boiling hydrothermal fluid with relatively low salinities at 290–320°C and 70 bars. The hydrovesuvianite has cell parameters of a 15.6254(5), c 11.8870(9) Å, and space group P4/nnc. The chemical composition of the hydrovesuvianite is similar to vesuvianites of metamorphic origin, and they have LREE-enriched chondrite-normalized rare earth element (REE) patterns and negative Eu anomalies. The hydrovesuvianite crystallized at 526.7 ± 3.6 Ma. Hydrothermal vesuvianite is an ideal U-Pb isotope dating mineral for hydrothermal mineralization and vesuvianite-bearing metamorphic rocks.
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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 | 0.000 |
| 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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.045 | 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 it