| Title Transcription | シマネ トットリ オカヤマ ヒロシマ ケンキョウ チイキ ノ チョウエンキセイガン ニ ズイハンスル コウブツ 4 シマネケン ヒロセ コウザン サン アルミニウム トウカクセンセキ ト オカヤマケン タカセ コウザン サン テツトウカクセンセキ
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| Title Alternative (English) | On Minerals Associated with Ultrabasic Rocks, Found in the Vicinity of Commom Boundaries of Shimane, Tottori, Okayama, and Hiroshima Prefectures(IV)
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| File | |
| language |
eng
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| Author |
Kitahara, Jun-ichi
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| Description | Subtitle : Aluminous Tremolite from the Hirose Mine, Shimane Pref. and Ferrian Tremolite from the Takase Mine, Okayama Pref.
Abstract: Geology of these area was reported before by the author, so it will not be described on again in this paper. The sample No. 1 was found at 34 m level of Hirose mine, and the sample No 2 was discovered at new No. 3 level of Takase mine. Both of the country rock of these samples are pyroxenite composed of enstatite an_d diopside, and a little part of them has been affected by residual magmatic autometamorphism, then tremolite was produced. It can be considered that the addition of Si0_2 and H_20 to these country rocks (pyroxenite) reacted chemically as the following equation. 3MgSi0_3 (enstatite) +2CaMgSi_20_6 (diopside) +Si0_2 + H_20→ (OH)_2Ca_2Mg_5Si_80_<22> (tremolite) In this reaction, the metamorphism does not advance so as to produce hornblende. The reason why fluorine does not exist in tremolite as shown in the chemical analysis table, is that pyroxenite was not metamorphosed by granitic rock. On the other hand, harzburgite has been metamorphosed by dioritic rock, and then asbestiform tremolite in small quantities has been crystallized from the harzburgite. The occurrences are sometimes observed in the region The general reaction equation may be expressed as follows. MgSi0_3 +Mg_2Si0_3 (olivine) +Si0_2 +CaO (from diorite) +H_20 →(OH)_2Ca_2Mg_5Si_80_<22> |
| Journal Title |
Memoirs of the Faculty of Literature and Science, Shimane University. Natural sciences
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| Volume | 1
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| Start Page | 34
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| End Page | 44 図5枚,表4枚
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| ISSN | 03709434
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| Published Date | 1968-03-15
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| NCID | AN0010806X
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| Publisher | 島根大学文理学部
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| Publisher Aalternative | The Faculty of Literature and Science, Shimane University
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| NII Type |
Departmental Bulletin Paper
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| OAI-PMH Set |
Faculty of Science and Engineering
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| 他の一覧 |
