MICROTOPOCHEMISTRY AND GEOCHEMICAL FEATURES OF A PYRITE NODULE OF СARBONACEOUS SILTSTONES OF THE SAF′YANOVKA MASSIVE SULFIDE DEPOSIT (CENTRAL URAL)
Bibliographic record
Abstract
Pyrite nodules of carbonaceous siltstones of the Saf´yanovka nonmetamorphosed massive sulfide deposit consist of a porous poikilitic pyrite core (zone A), which is partly transformed to metacrystalline pyrite aggregates at the periphery (zones В и С). According to LA-ICP-MS data, elements both of ore (Cu, Zn, Pb, In, Cd, Sn, Fe, S, Co, Ni, Se, Au, Sb and Bi) and hyaloclastic (Si, K, Al, Mg, Ga, V) associations are concentrated in the core centre (zone A). The elements of ore association are also dominant in the zone B. The zone С is depleted in trace elements except for As (up to 0.7 wt. %). Comparing with pyrite nodules from sulfide turbidites, this nodule exhibits much higher contents of Au (up to 35.3 ppm) and Ni (up to 614 ppm). It is supposed that organic material is a further additional source of Au and Ni in pyrite nodules hosted in black shales. In contrast to pyrite nodules from the Bracemac-McLeod (Canada) and Lahanos (Pontides) massive sulfide deposits (Genna, Caboury, 2015; Maslennikov et al., 2017), the outer zone of the Saf’yanovka pyrite nodule is depleted in most trace elements indicating incomplete geochemical cycle of autigenic mineral formation.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.003 | 0.002 |
| 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 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".