Microanalysis of Unique Fine-grained Minerals in the Martian Meteorite ALH84001

Details Microanalysis of Unique Fine-grained Minerals in the Martian Meteorite ALH84001 Microanalysis of Unique Fine-grained Minerals in the Martian Meteorite ALH84001

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1327t&link_type=abstract

Lunar and Planetary Science, volume 27, page 1327

Physics

2

Carbonates, Magnetito, Minerals: Fine-Grained

Scientific paper

ALH84001 is an igneous martian meteorite, consisting primarily of orthopyroxene (opx) and accessory phases including chromite, maskelynite, and carbonate. Trace amounts of augite, apatite, olivine, and pyrite have also been observed. In this work, we use transmission electron microscopy (TEM) to describe the chemistry and mineralogy of ultra fine-grained (nanometer-sized) regions in ALH84001. These regions include optically dark inclusions in the opx and Fe-rich grains rimming carbonate spheroids. These Fe-rich rims have precluded prior characterization because of their ultra fine grain size.

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