The Mineralogy of Hydrothermal Plume Particles at the Endeavour Mid-Ocean Ridge
Bibliographic record
Abstract
Hydrothermal vents (aka black smokers) exist along mid-ocean ridges where volcanoes continuously create ocean crust. These have recently been recognized as an important source of biologically important elements, such as Fe, to seawater. However, most dissolved constituents of hydrothermal plumes are precipitated into minerals near vents and these settle to the seafloor forming sediments. This study examines the mineralogy and geochemistry of those sediment-hosted particles to better understand the hydrothermal contribution of elements to biogeochemical cycles in the ocean. A sediment core taken near the hydrothermal vents at the Endeavour ridge segment of the Juan de Fuca ridge (300 km west of Vancouver Island) was used to examine post depositional changes in the mineralogy and chemistry of plume particles in this sediment. A six-step dissolution was applied to extract carbonates, biogenic silicates, Fe- and Mn-oxyhydroxides and Fe-oxide phases with the major and trace element compositions of each extraction analysed by ICP-MS. This data is being used to test the hypothesis that labile poorly crystalline Fe-oxyhydroxides redissolve over 100-1000’s of years, providing a mechanism by which Fe is releasing into the water column from the seafloor. This may provide a hitherto unrecognized source of biologically available Fe to the ocean.
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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 | 0.000 |
| 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".