Diffuse Soil Degassing in Hydrothermal Areas of Mt. Melbourne, Antarctica: Insights for the Understanding of Cryovolcanism on Earth
Bibliographic record
Abstract
Cryovolcanism is a phenomenon reported in dwarf planets and satellites in the solar system and is characterized by the eruptions of volatiles under low-temperature conditions. However, there are clearly limitations to understanding it fully from observations far from Earth. From this point of view, Antarctica is one of the most extreme environments on Earth and is a very important region for modeling the extraterrestrial environment. Here, we report a maximum soil CO 2 flux value of 6120 g m –2 d –1 and a total CO 2 output of 8355 t d –1 from the hydrothermal environment (up to 57.6 °C) of Mt. Melbourne, an active volcano located in Antarctica. In addition, fumarolic gases have δ 13 C values of −13.9 to −4.2‰ with CO 2 concentrations of 21.2–36.2 vol %. The corrected helium isotope ratios (Rc/Ra) of the gases are up to 2.21, indicating the magma degassing of Mt. Melbourne. However, hydrogen and oxygen isotopes of the ice samples inside the ice caves and ice towers in the hydrothermal region, similar to their surroundings, suggest that they are of largely atmospheric origin. Nevertheless, the circulated water caused hydrothermal alteration, producing minerals such as kaolinite and gibbsite, which greatly affected the moss habitat and microbial distribution of small greenhouse systems. Thus, the observations in this Antarctic hydrothermal system could potentially provide clues about extraterrestrial biological activity through cryovolcanism.
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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 | 0.000 |
| 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) | 0.000 | 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".