Rio Tinto Archives - Astrobiology

Summary of representative locations in the Arabian Peninsula that could be employed as analog sites for astrobiological studies. Colors denote environment types (green: salt flats, dark blue: deep-sea brine pools, light blue: hydrothermal vent systems, white: snow-covered mountains and deserts, gray: volcanic fields, red: hot springs, and yellow: deserts) -- Extremophiles

Analog Studies, Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Desert Worlds, Exploration Gear & Tech, Extremeophiles and Extreme Environments, Fossils & Paleontology, Habitable Zones, Mapping, Geodesy, Cartography, Bathymetry, Microbiology & Virology, Sample Return, Status Report

Extreme Arabian Environments And Their Microbiomes: New Frontiers For Astrobiology And Biosignature Discovery

by Keith CowingApril 13, 2026April 13, 2026

Astrobiology assesses the habitability of planetary bodies and the potential for extraterrestrial life.

Researcher Issaku Kohl recorded this image at a historic mining district in Spain, which scientists now an analog for the surface of Mars. It shows the mixing zone on the Rio Tinto, where green water, rich in the Fe2+ ion of iron, containing very high O₂ content sulfate, is discharging from a mine tailings pile. This water is mixing into the river’s main branch red waters, where most of the iron occurs as Fe3+ and sulfate oxygen is mostly sourced from water. -- University of Utah

Analog Studies, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Mars, Press Release

How A Pyrite-oxidizing Microbe Helps Preserve Atmospheric Oxygen In Sulfate

by Keith CowingOctober 27, 2025October 27, 2025

Because oxygen-bearing sulfate minerals trap and preserve signals from Earth’s atmosphere, scientists closely study how they form. Sulfates are stable over billions of years, so their oxygen isotopes are seen […]

Rio Tinto -- Wikipedia

Analog Studies, Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Fossils & Paleontology, Imaging & Spectroscopy, Microbiology & Virology, Status Report

Ground-Truthing Lipids and Other Complex Microbial Biomarkers in the Iron-Sulfur Rich Río Tinto Analog

by Keith CowingJuly 15, 2024July 7, 2024

Sulfate and iron oxide deposits in Río Tinto (Southwestern Spain) are a terrestrial analog of early martian hematite-rich regions. Understanding the distribution and drivers of microbial life in iron-rich environments […]

Río Tinto;

Analog Studies, Away Teams & Field Reports, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Press Release

Río Tinto’s Eukaryotes In Extreme Acidic Environments

by Keith CowingMarch 10, 2023March 10, 2023

A major issue in microbial ecology is to identify the limits of life for growth and survival, and to understand the molecular mechanisms that define these limits.