Loading...

Hydrothermal Vents

Discovery and Formation

Hydrothermal vents were discovered in 1977 by scientists aboard the submersible Alvin at the Galapagos Rift, 2,500 meters deep—one of the most significant biological discoveries of the 20th century. Vents form at mid-ocean ridges where tectonic plates diverge. Seawater percolates through cracks in the seafloor, is heated by magma to temperatures up to 400°C, dissolves minerals from the surrounding rock (sulfides of iron, copper, zinc, manganese), and erupts back into the ocean. 'Black smokers' emit superheated, mineral-rich fluid that precipitates as metallic sulfide particles upon contact with cold seawater, forming chimney structures up to 60 meters tall. 'White smokers' emit cooler fluid (200-300°C) rich in barium, calcium, and silicon. Despite temperatures that would instantly kill most organisms, the vents support lush communities of specialized life in an environment devoid of sunlight.

Hydrothermal Vents

Discovery and Formation

Hydrothermal vents were discovered in 1977 by scientists aboard the submersible Alvin at the Galapagos Rift, 2,500 meters deep—one of the most significant biological discoveries of the 20th century. Vents form at mid-ocean ridges where tectonic plates diverge. Seawater percolates through cracks in the seafloor, is heated by magma to temperatures up to 400°C, dissolves minerals from the surrounding rock (sulfides of iron, copper, zinc, manganese), and erupts back into the ocean. 'Black smokers' emit superheated, mineral-rich fluid that precipitates as metallic sulfide particles upon contact with cold seawater, forming chimney structures up to 60 meters tall. 'White smokers' emit cooler fluid (200-300°C) rich in barium, calcium, and silicon. Despite temperatures that would instantly kill most organisms, the vents support lush communities of specialized life in an environment devoid of sunlight.