Tait, Alastair W.; Wilson, Siobhan A.; Tomkins, Andrew G.; Gagen, Emma J.; Fallon, Stewart J.; Southam, Gordon
Unambiguous identification of biosignatures on Mars requires access to well-characterized, long-lasting geochemical standards
at the planet’s surface that can be modified by theoretical martian life. Ordinary chondrites, which are ancient meteorites
that commonly fall to the surface of Mars and Earth, have well-characterized, narrow ranges in trace element and
isotope geochemistry compared to martian rocks. Given that their mineralogy is more attractive to known chemolithotrophic
life than...[Show more]
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