Geologia do depósito de Au Cavalo Branco (Botuverá – SC)
Bibliographic record
Abstract
Cavalo Branco is a quartzvein gold deposit located in the Botuverá region (SC, Brazil). The deposit is genetically related to the emplacement of a small diorite pluton in a conjugated fracture of a shear zone affecting metapelitic hornfels from the Brusque Group, formed by granitic plutons emplaced around the deposit. The mineralizing fluid that formed the gold quartz vein has generated potassic, phyllic and propilithic hydrothermal zones around the vein. Gold, with small amounts of pyrite, chalcopyrite and galena, has crystallized during the development of the phyllic zone. A shear zone reactivation has deformed part of the gold bearing quartz vein and provided the rising of pink granite veins. New hydrothermal fluids related with the reactivation displaced gold and sulfides from the sheared portion of the deposit and promote carbonatization and chloritization of the host rocks. Recrystallized gold shows silver (23,20%) and copper (0,51%) grades a little higher than primary crystallized gold (19,95% e 0,01%, respectivelly). Recrystallization has not changed the sulfide compositions. Primary mineralization has the same characteristics of periplutonic granitogenic gold veins. Although the shear reactivation has changed gold composition and the alteration style of the host rocks, these changes are not considered enough to justify the classification of the deposit as “orogenic”. The facies of the diorite that formed the deposit and the pink granite dykes emplaced during the shear reactivation were not yet known in the Botuverá region.
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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 | 0.001 |
| 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 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".