RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 14, ES2002, doi:10.2205/2014ES000540, 2014

Table 4. Electron Microprobe Analyses (wt. %) of Orthopyroxenes From the Kastek Xenoliths
1 2 3 4 5 6 7 8 9
SiO$_2$ 55.09 54.95 57.09 55.01 55.09 55.41 55.65 55.05 55.00
TiO$_2$ - - 0.07 - - 0.03 - - -
Al$_2$O$_3$ 5.79 4.98 4.94 4.79 5.22 3.99 4.21 4.51 4.37
FeOt 7.09 7.18 7.22 6.85 7.14 6.24 6.18 6.20 5.85
MnO 0.10 0.08 0.16 0.04 0.05 0.04 0.09 0.07 0.10
MgO 32.41 32.25 32.15 32.19 32.08 32.26 32.87 32.74 32.91
CaO 0.68 0.69 0.72 0.73 0.70 0.58 0.51 0.63 0.78
Na$_2$O - - - - - - 0.06 - -
K$_2$O 0.03 - 0.02 - 0.06 - 0.06 0.02 0.02
Cr$_2$O$_2$ 0.50 0.23 0.33 0.15 0.33 0.19 0.12 0.23 0.30
Wo 1.32 1.41 1.38 1.00 1.52 1.49 1.22 1.23 1.50
En 87.78 87.35 87.62 89.44 89.41 89.77 90.50 89.18 88.20
Fs 10.90 11.24 11.00 9.56 9.07 8.74 8.28 9.59 10.30
Si 1.877 1.893 1.933 1.908 1.897 1.940 1.924 1.910 1.896
Ti - - 0.002 - - 0.001 - - -
Al 0.233 0.202 0.197 0.196 0.212 0.165 0.172 0.184 0.178
Cr 0.013 0.006 0.009 0.004 0.009 0.005 0.003 0.006 0.008
Fe$^{**}$ 0.202 0.201 0.204 0.199 0.206 0.183 0.179 0.18 0.145
Fe$^{***}$ 0.006 0 0 0 0 0 0 0
Mn 0.03 0.002 0.005 0.001 0.001 0.001 0.003 0.002 0.029
Mg 1.646 1.664 1.623 1.665 1.647 1.684 1.694 1.693 1.691
Ca 0.025 0.025 0.026 0.027 0.026 0.022 0.019 0.023 0.029
Na 0 0 0 0 0 0 0.004 0 0
K 0.001 0 0.001 0 0.003 0 0.003 0.001 0.001
Note: sample TS90-1x.

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Citation: Grachev A. F., P. V. Ermolov, Yifen Wang (2014), Modification of the lithospheric mantle during the early activity of a cenozoic plume in the North Tien Shan: Evidence from mantle xenoliths in basalts, Russ. J. Earth Sci., 14, ES2002, doi:10.2205/2014ES000540.
 

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