Other
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91..353t&link_type=abstract
(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 16th, Houston,
Other
Achondrites, Meteoritic Composition, Shock Heating, Chemical Composition, Meteoritic Microstructures, Shock Loads
Scientific paper
Shock textures and mineral chemistry reveal that Yamato 791073 is a meteorite intermediate between Diogenite and cumulative eucrite and is similar to Yamato 75032-type achondrites. Pyroxene compositions in Y791073 fall in a limited range from Mg/(mg + Fe) = 0.7 to 0.6 and are compatible with the continuum of rock types produced by differentiation on the howardite parent body. The chemical variation of pyroxene is wider than that of the monomict Y75032 group. In addition to Fe-rich diogenite-like pyroxene common in Y75032, Y791073 contains pyroxene clasts similar in texture to those in Moore County. Y791073 also contains a highly differentiated Si- and K- rich clast, and it shows a more polymict nature in comparison to other achondrites. Nonetheless, its more limited lithic variation suggests that it sampled two or three layers of the layered crust or pluton produced by the crystal fractionalization.
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