The Rootzone of an Ancient Hydrothermal System Exposed in the Troodos Ophiolite, Cyprus
Bibliographic record
Abstract
A well‐exposed, oceanic hydrothermal rootzone in the Troodos ophiolite, Cyprus, is composed of the basal sheeted dikes, the upper 50–100 m of the gabbroic sequence, and a contact aureole, interpreted as a fossil conductive boundary layer. The basal sheeted dikes and upper gabbros were pervasively altered at high temperatures (400°–775°C) and cut by a series of broadly distributed mineralized faults that are oriented parallel to the strike of the sheeted dike complex. Fluid inclusion and mineralogical data for fault breccias show that circulating fluids were 350°–400°C, fairly oxidizing, and relatively H2S rich, with a range in salinity (1.5–7.8 wt % NaCl equivalent). Field and petrological evidence suggest that the rootzone migrated from the basal sheeted dikes into the upper gabbros and back again, perhaps for several cycles. These migrations and P‐T oscillations in the conductive boundary layer were likely caused by fluctuations in thermal conditions imposed by the magmatic system at a spreading center. The hydrothermal rootzone did not migrate to significant depths in the plutonic sequence until the waning stages of magmatism.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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".