Diagenetic and Metallogenic Sources of Furong Tin Deposit,Qitianling:Constraints from Lu-Hf for Zircon and He-Ar Isotope for Fluid Inclusions
Bibliographic record
Abstract
Determination of zircon U-Pb isotopic date and Lu-Hf isotopic composition of various granitoids in the Qitianling plutons,south China show,there are two-staged granites:the earlier hornblende granitite with 160.02.7Ma of zircon U-Pb concordant age and the later granitite with 156.51.8Ma of zircon U-Pb concordant age.Metamietimation of zircons appear in the later mineralizing granitite,those zircon is intensively riched in LREE,U and Th,and characteristics of hydrothermal zircon.Lu-Hf isotopic compositions of zircons from four granites show that diagenetic substance are derived from the lower crust, which original magmas were resulted from partial melting of the lower crust in the palaeo-Proterzoic(1.3~ 1.5Ga),with some mantle substance adding.He-Ar isotopic compositions for fluid inclusions of pyrite and garnet from the Qitianling Furong tin deposit also show a lower ratio of 3 He/4 He(0.059~0.432), which ranges from those between the crust and mantle,suggests mantle fluids are involved in mineralization for the deposit(less than 10%for the amount).
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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 | 0.002 | 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".