Origin of Fluorite Mineralisation and Hydrothermal Alteration at the Chandidongri Deposit, Rajnandgaon District, Central India - Evidence from Oxygen and Hydrogen Isotopes
Bibliographic record
Abstract
Abstract Economic mineralization relatable to the early-Proterozoic Dongargarh granite that forms part of a large volcano-plutonic complex of Central India includes the Chandidongri fluorite deposit located on the granite, a few small deposits of uranium in sheared rhyolites and basic rocks in close proximity to the granite, and minor Cu±Pb mineralisation within sheared rhyolites In the fault-controlled fluorite deposit at Chandidongri, the δ18O values of fluonte-beanng quartz lange from 11 4 to 13 8 per mil, whereas δ18O values of quartz from intensely altered granites range from 13 0 to 14 4 per mil The δD values of fluid inclusion waters extracted from vein-quartz, fluorite and quartz from altered granites range from -32 to -52, -38 to -40 and -48 to -60 per mil respectively The δ18O values and measured δD values indicate a dominantly meteoric source for the fluorite and alteration fluids that may have undergone slight mixing with magmatic water
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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 | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 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".