Bulletin of the Geological Survey of Japan Vol.50 No.10 (1999)
Cover photograh | Table of Contents |
Cover photograh
Microphotographs of the basic granulite from the Main Zone of the Hidaka metamorphic belt, Hokkaido (left: plain polarized light; right: crossed polarized light)
The basic granulites occur along the western margin of a gabbroic body in the northern part of the metamorphic belt, and they show similarities in chemistry to normal mid-ocean ridge basalts. The rock in the photographs contains plagioclase, brown hornblende, orthopyroxene and clinopyroxene, and it is relatively coarse-grained and rich in pyroxenes. Pyroxenes often occur in contact with plagioclase crystals. The vertical length is about 2.6mm. [See Mikoshiba (Ujiie) in this issue. Sample No. 92100307.]
(Photoed by Masumi UJIIE MIKOSHIBA)
Table of Contents
| Title | Author | |
|---|---|---|
| Chemical characteristics of basic metamorphic rocks from the Main Zone of the Hidaka metamorphic belt, Hokkaido: an affinity to mid-ocean ridge basalts | Masumi MIKOSHIBA (UJIIE) (613-634) | 50-10_01.pdf (3,157KB) |
| Subsurface temperature profiles in the Nobi Plain, central Japan | Youhei UCHIDA and Yasuo SAKURA (635-659) | 50-10_02.pdf (1,974KB) |
| Ilmenite-series and magnetite-series classfications of the Yanshanian granitoids of South China | Shunso ISHIHARA and Ping-an WANG (661-670) | 50-10_03.pdf (2,012KB) |
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