From its perpetually incandescent lava lake, which stays blazing hot even throughout winter, to its daily expulsion of thousands of dollars’ worth of gold, Mount Erebus harbors considerably more than what meets the eye.
Among the numerous volcanoes scattered across Antarctica, Mount Erebus stands out as one of the continent’s most formidable. Reaching a summit elevation of 3,794 meters, it holds the distinction of being both the tallest active volcano in Antarctica and the southernmost active volcano globally.
Named for the Greek mythological personification of darkness, the Erebus volcano is reported to have been actively erupting when Captain Sir James Clark Ross first sighted it in 1841. It boasts a persistent lava lake, potentially several kilometers deep, which has been churning since at least 1972. This lake maintains its fiery glow even during the frigid Antarctic winter, classifying it as one of merely five known lava lakes worldwide that behave in such a manner.
Mount Erebus is also noteworthy due to a curious finding made by researchers examining its gas emissions. These exhalations contain minuscule metallic gold crystals, measuring no more than 20 micrometers across. Estimates suggest the volcano releases approximately 80 grams of gold daily, translating to roughly $6,000.
This golden dust disperses over vast distances. Antarctic researchers have detected traces of the gold in the surrounding atmosphere up to 1,000 kilometers away from the mountain. The volcano regularly vents plumes of gas and steam. During earlier phases of heightened volcanic activity, it has notably ejected semi-molten rock boulders known as “volcanic bombs.”
Despite all this superheated volcanic activity, Mount Erebus is also characterized by extensive ice caves. These winding networks were sculpted by gases escaping from the volcano, forming what are termed fumarole ice caves. The extreme conditions within these caves make them a prime location for studying extremophiles; indeed, 61 species of fungi have been identified in the Erebus caves.
Their discovery in 2013 is believed to mark the initial documentation of a fungal community established within a dark, oligotrophic volcanic environment in Antarctica. These fungi show a connection to animal skin surfaces and require high lipid content for growth, leading researchers to posit the potential presence of trace human influence.
These caves have been explored by scientists and expeditions ever since the Heroic Age of Antarctic exploration in the 20th century. Warren’s Cave is among the most frequently visited, situated close to a developed field camp called the “Lower Erebus Hut” and approximately 300 meters from the volcano’s edge.
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