Researchers Identify New Martian Analogue Sites
The study confirms sites in India and Chile that preserve water-rock signatures essential to understanding the Martian surface.
Updated on Oct. 16, 2026 in Geology
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Researchers from the University of Kerala have identified Martian analogue sites in Tamil Nadu, India, and the Atacama Desert, Chile. Published in the Journal of Geophysical Research: Planets, the study reveals the presence of hydrous sulphates that mimic past environmental conditions on Mars.
Why it matters
Identifying these minerals helps scientists refine models of Martian water-rock history and target environments for future research into primitive life. The sites act as terrestrial testing grounds for understanding how specific chemical signatures persist in extreme, arid conditions.
The study confirmed two hydrous sulphates, melanterite and gypsum, using a laser Raman spectrometer to detect unique spectral fingerprints. These minerals serve as markers for historical water-rock interactions that align with geological conditions observed on the Martian surface.
The players
University of Kerala
A public research institution in India that manages the DST-FIST program, which provided funding for this geological survey.
The details
Researchers utilized laser Raman spectroscopy, a technique that fires a laser at a sample to measure the scattering of light, identifying the unique molecular vibrations of minerals. By analyzing the spectral signatures, the team confirmed the presence of melanterite in Neyveli and gypsum in the Tiruchirappalli Badlands, alongside the Chilean Atacama site. These hydrous sulphates—minerals that incorporate water into their crystalline structures—provide clear evidence of past aqueous environments.
Timeline
October 16, 2026: Article publication date.
The Tech Race
This research follows a global trend of characterizing extreme environments to calibrate Mars exploration data. The study marks a shift toward using terrestrial analogues to constrain the geochemical signatures that future landers should prioritize.
The study provides a new framework for geologists and astrobiologists to identify and sample potential Martian surrogate sites in remote regions. These findings serve as a technical reference for future fieldwork planning in arid environments that mimic Martian crustal conditions.
The takeaway
The team plans to focus on rare analogue sites in extreme conditions to study evidence of primitive life. Scientists and students should monitor the University of Kerala for subsequent publication of their field survey methods in these extreme locations.
Further reading
For broader research on terrestrial mineralogy, visit the Geology section.
Source note: This article includes information reported by ETV Bharat News.
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