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    nitrogen-bearing organics tagged posts

    4-Billion yr old Nitrogen-containing Organic molecules discovered in Martian Meteorites

    May 5, 2020, Categories  Astronomy/Space, Chemistry/Nanotechnology

    20200429_AKobayashi1
    A rock fragment of Martian meteorite ALH 84001 (left). An enlarged area (right) shows the orange-coloured carbonate grains on the host orthopyroxene rock. Credit: Koike et al. (2020) Nature Communications.

    Scientists exploring Mars and analysing Martian meteorite samples have found organic compounds essential for life: nitrogen-bearing organics in a 4-billion-year-old Martian meteorite. With a new high-spatial resolution in-situ N-chemical speciation technique, they found organic materials – either synthesized locally or delivered during the Noachian – preserved intact in carbonate minerals over a long geological period. Their presence requires abiotic or biotic N-fixation and ammonia storage, suggesting early Mars had a less oxidizing environment than today.

    Because carbonate miner...

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