Mathematics – Logic
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..705k&link_type=abstract
Lunar and Planetary Science, volume 27, page 705
Mathematics
Logic
9
Basalt, Mars, Meteorites: Snc, Rare Earth Elements, Shergottites
Scientific paper
QUE94201 is a new mafic achondrite dominated by pyroxene and plagioclase. Petrologic and geochemical analyses of a bulk chip (,16) and thin-section (,7) indicate the sample is a basaltic gabbro that is related to previously described basaltic and lherzolitic shergottites of suspected martian origin. However, unlike the cumulate fractions represented by other shergottites, QUE94201 is a plutonic rock that fractionally crystallized in what appears (petrographically) to be a closed system. QUE94201 contains more Fe-rich pyroxene and more bulk Al, Ti, and P than other shergottites, including lithology B of EETA79001, and thus appears to be more evolved. However, QUE94201 is also more LREE-depleted than other shergottites which suggests it has not assimilated as much of the LREE-enriched mantle component thought to have affected the compositions of other shergottites.
Boynton Willam V.
Gleason James D.
Hill Dolores H.
Kring David A.
Timothy Jull A. J.
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