What is the geochemistry of hydrothermal vents?

Hydrothermal vents are seafloor fissures that discharge geothermally heated water, delivering a wide array of dissolved elements that shape global marine biogeochemistry. Sites like the Lost City field feature ultramafic-hosted serpentinization that abiotically produces simple molecules such as hydrogen and methane. These unique chemical environments help support chemosynthetic microbial communities and offer key insights into the origin of life.

What we know

• Hydrothermal vents deliver a wide range of elements to the world's oceans, contributing significantly to global marine biogeochemistry. [4]
• The Lost City Hydrothermal Field is an area of marine alkaline vents driven by active and inactive ultramafic-hosted serpentinization. [2]
• Ultramafic-hosted serpentinization at Lost City abiotically produces simple molecules like methane and hydrogen, which serve as fundamentals for microbial life. [2]
• The extreme depth and vent fluid temperature of sites like the Beebe Hydrothermal Vent Field make them important locations for studying aqueous thermodynamics and geochemistry. [3]

Where to go next

• how it workedWhat are black and white smokers?
• what followedHow do chemosynthetic bacteria survive at vents?
• whereWhere is the Lost City Hydrothermal Field located?
• the bigger pictureCould hydrothermal vents have sparked the origin of life?
• a case in pointWhat makes the Beebe Vent Field uniquely deep?
• an unexpected connectionHow do underwater vents relate to moons like Enceladus?Active hydrothermal systems are not unique to Earth's seabed and are theorized to exist on ocean-bearing moons in our outer solar system.

Sources

• [1]Kamaʻehuakanaloa Seamount · CC BY-SA 4.0
• [2]Lost City Hydrothermal Field · CC BY-SA 4.0
• [3]Beebe Hydrothermal Vent Field · CC BY-SA 4.0
• [4]Hydrothermal vent · CC BY-SA 4.0