Chemical Gardens as Flow-through Reactors Simulating Natural Hydrothermal Systems

Area of Science:

• Astrobiology
• Geochemistry
• Origin of Life Studies

Background:

• Submarine hydrothermal springs are key environments for studying the origin of life.
• Simulating early Earth and planetary conditions is crucial for understanding habitability.

Purpose of the Study:

• To experimentally simulate hydrothermal chimney growth using chemical gardens.
• To test various fluid chemistries relevant to early Earth, Mars, and icy moons.
• To investigate the potential for self-assembling structures in prebiotic environments.

Main Methods:

• Utilized injection chemical garden methods for experimental simulations.
• Grew chemical garden structures under anoxic conditions.
• Incorporated phosphates and organics into structures.
• Switched injection solutions to introduce secondary anions.
• Measured membrane potentials generated by chemical gardens.

Main Results:

• Self-assembling chemical garden structures mimicking natural chimneys were formed.
• Experiments demonstrated the incorporation of phosphates and organics.
• The ability to use precipitates as flow-through reactors was shown.
• Membrane potential generation was successfully measured.

Conclusions:

• Chemical garden experiments provide a versatile platform for simulating prebiotic chemical environments.
• These simulations offer insights into the potential for life's origins on Earth and other celestial bodies.
• The developed method allows for the study of self-assembly and reactor functions relevant to astrobiology.