Scanning proton microprobe analysis of fragments of ALH84001

Details Scanning proton microprobe analysis of fragments of ALH84001 Scanning proton microprobe analysis of fragments of ALH84001

Publishing date

Mar 1997

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1367s&link_type=abstract

Journals

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 367.

Science

Computer Science

Additional info 3

Mars Surface, Meteoritic Composition, Carbonates, Rocks, Organisms, Fragments, Proton Beams, Silicon, Iron, Sulfur

Type

Scientific paper

Abstract

Fragments from the Mars meteorite ALH84001 containing carbonate globules, which could harbor evidence of primite life, were placed into the Nuclear Microprobe and analyzed with a beam of MeV protons focused to a diameter of 1 micron. By scanning the beam across the sample elemental maps, line profiles and quantitative point analyses were obtained. It is shown that the carbonate globules are between 2 and 4 microns in depth. The silicon content of the base rock disappears at the iron- and sulphur-rich rim. It is suggested that areas of high iron content could be linked to high oxygen concentrations.

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