Marine controlled source electromagnetic methods for gas hydrate assessment: New instrumentation and first results from the Black Sea test cruise
Why this work is in the frame
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Bibliographic record
Abstract
The electrical conductivity of the seafloor derived from marine controlled source electromagnetic (CSEM) data can be related to the gas hydrate concentration and distribution within the stability zone, and can provide valuable information for resource assessment. Gas hydrates are electrically resistive in contrast to the conductive pore fluid and may significantly increase the bulk resistivity where they occur in sufficient quantities. The marine electromagnetic group at BGR has developed a new, seafloor-towed, electrical multi-receiver system that consists of a transmitting dipole and four receiving dipoles at increasing offsets, sensitive to depths relevant for gas hydrate evaluation from the seafloor to some hundred meters below. The system was successfully deployed on a test cruise on RV Poseidon in water depth of 1335 m over known gas hydrate targets in the Danube Delta, and in shallow water on the upper rim of the Danube Canyon. Inversion of the data reveals highly anomalous resistivity which at least for the deep water deployment can be explained with a combination of fresh pore water and the presence of gas hydrates in the sediments.
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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 | 0.007 | 0.003 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 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 it