NASA Uses Mineralogical Marker to Understand Ancient Martian Climate
5 Min Read NASA Uses Mineralogical Marker to Understand Ancient Martian Climate This composite image looking toward the higher regions of Mount Sharp was taken on September 9, 2015, by NASA’s Curiosity rover. In the foreground — about 2 miles (3 kilometers) from the rover — is a long ridge teeming with hematite, an iron oxide. Credits: NASA/JPL-Caltech/MSSS While NASA imagery has shown evidence of ancient rivers and lakes on Mars that transitioned to dry dunes, uncertainty re
NASA's Curiosity rover has identified a new method for understanding Mars' ancient climate by analyzing the microscopic structure of hematite crystals. The size and shape of these iron oxide crystallites vary depending on the temperature and water conditions present during their formation. Scientists studied samples from Gale Crater and found distinct differences in hematite crystallite sizes at various elevations. The presence and absence of goethite, a mineral often found with hematite, also provided clues about past environmental conditions.
This discovery offers a more precise timeline for Mars' climate shifts, suggesting that habitable conditions may have persisted in underground aquifers for millions of years longer than previously thought.
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