Toward Process-Driven Research in Astrobiology: Stepping Away from the Binary Biogenicity Versus Abiogenicity...

Area of Science:

• Geobiology and Astrobiology
• Paleontology
• Geochemistry

Background:

• Biological activity profoundly shapes Earth's environments, but distinguishing ancient life signatures in the rock record is challenging.
• Diagenesis and alteration processes in ancient rocks obscure crucial biological signatures, complicating life detection.
• Current methods often focus on a binary life/non-life determination, limiting comprehensive analysis.

Purpose of the Study:

• To shift research focus from outcome-based (life vs. non-life) to process-driven investigations of biosignatures.
• To explore the fundamental scientific principles governing the formation of biologically influenced features in rocks.
• To provide a framework for overcoming challenges in identifying and interpreting ancient life signs.

Main Methods:

• Reviewing and synthesizing existing knowledge on biosignature formation and preservation.
• Analyzing the interplay between biological activity and geological processes.
• Developing a conceptual model for process-based biosignature research.

Main Results:

• Identified key challenges in distinguishing biological signatures from abiotic processes in the ancient rock record.
• Highlighted the limitations of traditional binary approaches to life detection.
• Established the necessity of understanding underlying geological and chemical processes.

Conclusions:

• A process-driven research approach is essential for a more robust understanding of life's role in shaping the rock record.
• This approach facilitates the development of new methodologies for detecting and interpreting biosignatures.
• Further research is needed to implement and validate these process-based strategies for exploring ancient life.