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SAM measures oxygen and sulfur compounds in first soil samples

SAM measures oxygen and sulfur compounds in first soil samples
SAM measures oxygen and sulfur compounds in first soil samples Curiosity detected sulfur, chlorine, and oxygen compounds in fine grains scooped by the rover at a wind drift site called "Rocknest." The grains were heated and analyzed using the rover's Sample Analysis at Mars, or SAM, instrument suite. Scientists indicate the oxygen and chlorine may come from perchlorate or similar compounds, which contain chlorine and oxygen. Perchlorates were also found by Phoenix near Mars' north pole. The sulfur compounds suggest the presence of sulfides or sulfates in the grains. NASA / JPL / GSFC