Weird Places: The Lava Lake in Antarctica

TL;DR

Mount Erebus in Antarctica is home to a rare lava lake that constantly releases gas, with its composition changing every ten minutes.

Transcript

Earth is covered in lakes. Mostly these are cool, watery affairs full of life and great for a relaxing vacation. Lava lakes are a little less serene: they’re scorching, seething pools of molten rock. They’re also pretty rare, outside of MineCraft permanent lava lakes only exist in a few places around the globe. One of the strangest lava lakes is at... Read More

Key Insights

• ❄️ Lava lakes are rare phenomena, and Mount Erebus in Antarctica is home to one of the few persistently active lava lakes on Earth.
• 🌋 Mount Erebus's lava lake is maintained by a combination of a crater, conduit, and magma chamber, which not all volcanoes possess.
• 🫢 Gas emissions in Mount Erebus's lava lake have a ten-minute cycle, revealing repetitive shifts in gas composition.
• 🫢 Explosive degassing in the lava lake causes small eruptions, distinct from the shorter gas cycle events.
• ❄️ Researchers are studying Mount Erebus's lava lake to gain insight into its inner workings and improve understanding of lava lakes globally.
• 🌋 The lava lake on Mount Erebus provides a unique environment for studying phonolite magma, which differs from the more common basaltic magma found in other volcanoes.

Questions & Answers

Q: How is Mount Erebus's lava lake different from regular lakes?

Mount Erebus's lava lake is an extremely hot, constantly changing pool of molten rock, in contrast to cool and stable water lakes found on Earth.

Q: What factors contribute to the uniqueness of Mount Erebus's lava lake?

The presence of a crater, conduit, and underground magma chamber make Mount Erebus's lava lake rare, as these elements need to align for a lava lake to exist.

Q: What makes scientists interested in studying Mount Erebus's lava lake?

Scientists are intrigued by the gas emissions of the lava lake, as its composition varies in a ten-minute cycle, and studying this phenomenon can provide insights into volcanic activity.

Q: How do researchers explain the gas cycle in Mount Erebus's lava lake?

The gas cycle in the lava lake is believed to result from a constant release of carbon dioxide-rich gas from the conduit and sporadic emissions of gases from deeper magma chambers caused by magma blobs rising to the surface.

Summary & Key Takeaways

• Mount Erebus in Antarctica has a unique lava lake that constantly releases gas and undergoes a ten-minute cycle of gas composition changes.

• The lava lake sits in a crater within Mount Erebus's main crater and is sustained by a conduit leading to an underground magma chamber.

• Scientists are studying the gas emissions and the dynamics of the lava lake to understand its behavior and contribute to knowledge about lava lakes worldwide.