Physics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..737l&link_type=abstract
Lunar and Planetary Science, volume 27, page 737
Physics
Chondrites, Composition, Minerals
Scientific paper
In the present paper the results of elemental abundances in the different grain-sized main mineral fractions of enstatite chondrite Pillistfer are reported. The fractions were isolated by methods of physical separation and their elemental composition was determined by instrumental neutron activation analysis. Table 1 shows the average elemental enrichment factors relative to CI chondrite for sixteen separate fractions. The mineral fraction A (71 < d < 100 micrometers) has enstatite grains; the mineral fraction B (45 < d < 71 micrometers) has plagioclase grains; the fractions C (160 < d < 260 micrometers), D (lOO < d < 160 micrometers), E (71 < d < 100 micrometers) and F (45 < d < 71 micrometers) contain oldhamite grains; the fractions G (260 < d < 360 micrometers), H (160 < d < 260 micrometers), (l00 < d < 260 micrometers) and L (71 < d < 100 micrometers) have no oldhamite grains; the fractions M (25 < d < 45 micrometers) and N (l < d < 25 micrometers) are rich in accessory minerals; the fraction Q (71 < d < 100 micrometers) has daubreelite and ferroalabandite grains; the mineral fraction P (71 < d < 100 micrometers) contains oldhamite and sinoite grains; the fraction Q (d < 45 micrometers) has troilite grains; the fraction R (35 < d < 45 micrometers) has density rho < 4.18 g cm^-1.
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