PDF (Hi-Res) - Smithsonian Institution Libraries
PDF (Hi-Res) - Smithsonian Institution Libraries
PDF (Hi-Res) - Smithsonian Institution Libraries
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88 SMITHSONIAN CONTRIBUTIONS TO THE EARTH SCIENCES<br />
Constituent<br />
SiO2<br />
TiO2<br />
A1 2°3<br />
FeO<br />
MgO<br />
CaO .......<br />
Na2O<br />
K20<br />
Rb<br />
Sr<br />
Y<br />
Zr<br />
Nb<br />
Mo<br />
Ba<br />
La<br />
Ce<br />
Pr<br />
Nd<br />
Sm<br />
Eu<br />
Gd<br />
Tb ,<br />
Dy .<br />
Ho<br />
Er<br />
Tm<br />
Yb ,<br />
Hf<br />
Th<br />
TABLE 2.—Range and average chemical composition for each of the Allende groups (oxides<br />
in weight percent, elements in ppm; the numbers in parentheses after the group are the<br />
number of specimens analyzed)<br />
Group I (10)<br />
Range Average<br />
24.9-35.1<br />
1.0-1.5<br />
21.5-32.6<br />
0.4-3.1<br />
6.9-12.6<br />
23.2-33.3<br />
0.11-0.92<br />
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