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| Fig.1 A large peridotite xenolith in Alakali Basalt;
colorful interference colors are mainly olivine under XPL. The black ground mass consists of plagioclase and pyroxene with olivine phenocryst. There are some narrow reaction zones at contact region. |
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| Fig.2 A small peridotite
xenocryst in Alakali Basalt; colorful interference colors
are mainly olivine under XPL. The black ground mass consists of
plagioclase and pyroxene with olivine phenocryst.There are very narrow reaction zones at contact region. |
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| Fig.3 A small felsic xenocryst in
Alakali
Basalt; yellow to cream yellow interference colors are clino-pyroxenes
under XPL.
Pyroxenes have parallel cleavages under PPL and show oblique extinction
around 40 deg. under XPL. Gray colored Alkali felspars (nepheline?) are attached to felsic
xeno-cryst at the bottom under XPL. The black ground mass consists of plagioclase and pyroxene with olivine phenocrysts. There is a black surrounding reaction zones around xeno-cryst. The black area contains many small opaque minerals and also it seems to contain rapid cooling glass?. |
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| Fig.4 A simmilar felsic xenocryst in Alakli Basalt; some colorful interference color phenocryst are clino-pyroxenes under XPL. They show oblique extinction around 40 deg. There are some twin alkali felspars (sanidine?) surrounding the xeno-csryst. |
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| Fig.5 A small felsic xenocryst
with surrounding dark ground mass upper left. On the other hand, I
surpose some big phenocryst(yellow colored under XPL) may be olivine
though their low relief and interference color. The upper-left small xenocryst looks like a small geode. |
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| Fig.6 Another small felsic xenocryst with quarts and some mafic phenocrysts with corroded rim. |
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| Fig.7 A big felsic xenolith, large
areas are occupied Alkali felspars ( or nepheline?). Clino-pyroxenes are
scattered as Poikilitic txture. |
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| Thin section tips and sampled rocks |
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| upper: mainly peridotite xenolith or xenocryst bottom: felsic xenocryst |