| Title Transcription | サンイン タイ ノ ホウブツサン カコウガン ニオケル ストロンチウム ドウイタイ ヒ ショセイチ ト セイナン ニホンナイ タイ ノ ハクアキ コダイサンキ カセイガン ルイ ノ ストロンチウム ドウイタイ ノ チリテキ ブンプ
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| Title Alternative (English) | Initial Sr Isotope Ratio of the Hobutsu-san Granite, San'in Belt, SW Japan : Implications for Sr Isotope Variation of Cretaceous-Paleogene Igneous Rocks in the Inner Zone of SW Japan
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| File | |
| language |
eng
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| Author |
Iizumi, Shigeru
Kagami, Hiroo
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| Description | The Hobutsu-san granite stock, the southwestem part of Tottori prefecture, SW Honshu, has a Rb-Sr whole rock isochron age of 72.3±2.8Ma with an initial ratio of 0.70681. The initial ratio is remarkably high for granitoids of the San'in Belt. High Sr isotope ratios of some lower crustal granulite xenoliths included in an alkali basalt of the Oki islands, suggest that the lower crust could have been a magma source for the Hobutsu-san granite. Initial Sr isotopic ratios of Cretaceous-Paleogene igneous rocks in the Inner Zone of Southwest Japan decrease from south to north through a transitional zone. This supports a previous suggestion by KAGAMI et al. (1987) that the magmas for the granites of SW Honshu and North Shikoku have been derived from three source regions with different geochemistry.
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| Journal Title |
Memoirs of the Faculty of Science, Shimane University
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| Volume | 21
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| Start Page | 145
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| End Page | 152
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| ISSN | 03879925
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| Published Date | 1987-12-25
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| NCID | AN00108106
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| Publisher | 島根大学理学部
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| Publisher Aalternative | The Faculty of 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 |
