Tag Archives: jarosite

Potassium-argon dating of Mojave2 sample by Curiosity finds Amazonian-age jarosite

On the basis of studies of impact crater densities on Mars’s surface, scientists have separated the Red Planet’s geologic history into three broad divisions, the most recent of which is the Amazonian epoch. Because of the lack of available samples … Continue reading

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HiRISE: Jarosite in Noctis Labyrinthus

This image shows the western side of an elongated pit depression in eastern Noctis Labyrinthus. Along the pit’s upper wall is a light-toned layered deposit. CRISM spectra extracted from the light-toned deposit are consistent with the mineral jarosite, which is … Continue reading

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Hunt for signs of Mars life might erase them

Scientists have discovered that the mineral jarosite breaks down organic compounds when it is flash-heated… Jarosite is an iron sulphate and it is one of several minerals that NASA’s Curiosity rover is searching for, as its presence could indicate ancient … Continue reading

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Curiosity takes second bite of Mt. Sharp

The second bite of a Martian mountain taken by NASA’s Curiosity Mars rover hints at long-ago effects of water that was more acidic than any evidenced in the rover’s first taste of Mount Sharp, a layered rock record of ancient … Continue reading

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Could Mars gypsum preserve microbes?

Sulfate minerals, such as calcium sulfates (gypsum), are common in areas on Mars, having been documented with data from satellites, landers, and rovers. Could these minerals also preserve the remains of ancient life, ask Kathleen Counter Benison and Francis Karmanocky III … Continue reading

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“Blueberries” could date when Meridiani rocks were last wet

The relative amount of three chemical elements contained in Martian “blueberries” might offer scientists a way to date when these spherules were last inundated with water, according to recent research. Rich in the iron mineral hematite, blueberries are small concretions, … Continue reading

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Jarosite: key to ancient temperatures?

The water-related mineral jarosite is occurs both on Earth and in sediments on Meridiani Planum, Mars. Scientists have found that by measuring the isotope ratio of argon-40 to argon-39 in the rock — a technique that can be applied to … Continue reading

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