Structural Architecture of the Cenozoic Kallianos (Post‐?)Orogenic Vein‐Hosted Au‐Ag‐Te Deposit and Its Relationship to the North Cycladic Detachment System, Greece
Bibliographic record
Abstract
Abstract The Kallianos Au‐Ag‐Te deposit is a Cenozoic orogenic‐style deposit on Evia, hosted in the Cycladic Blueschist Unit. Integrated field observations and isotopic data illustrate a connection between the structural architecture that hosts mineralization in the deposit and the regional stress field associated with a crustal‐scale detachment, the North Cycladic Detachment System, implying a first‐order paragenetic relationship to post‐orogenic extension. Mineralized and barren veins occur alongside parallel faults and joints in two distinct orientations, each locally defining conjugate or en‐echelon sets. Younger sub‐vertical tension gash sets (V 2 , V 3 ) cross‐cut older transposed and boudinaged mineralized veins (V 1 ). Sulfide mineralization is hosted in steeply dipping cm‐scale qz ± cal ± ab V 3 veins. Structural relationships show cross‐cutting of NW‐striking V 2 by NNW‐striking V 3 veins. The latter two vein sets opened orthogonal to the NE‐trending stretching lineations, associated with brittle‐ductile shear bands indicating top‐NE kinematics, underscoring their relationship to crustal extension accommodated by the detachment system. Carbon‐Oxygen isotope data from vein calcite (δ 13 C: −3.31–0.40‰ and δ 18 O: 14.43–20.78‰) reflect fluid mixing with the graphite‐bearing wall rock. White mica 40 Ar/ 39 Ar and in situ 87 Rb/ 87 Sr geochronology suggest that the host rock accommodated greenschist facies deformation between c. 20–31 Ma, whereas hydrothermal mica in vein haloes indicates fluidization and vein sealing at c. 21–26 Ma. Zircon (U‐Th)/He dates reveal that the rocks cooled below ∼200°C at c. 11–14 Ma, corresponding to the exhumation of the deposit into the brittle crust. A comprehensive study of this younger, mostly undeformed post‐orogenic deposit can help elucidate the tectonic setting of older, polydeformed orogenic gold deposits.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".