環伊豆地塊蛇紋岩帯(鮫島輝彦先生追悼論文集)
書誌事項
- タイトル別名
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- カン イズ チカイ ジャモンガンタイ
- The Circum-Izu Massif Serpentine Belt(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA)
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説明
The Circum-Izu Massif Serpentine Belt is a fossil transcurrent plate boundary of the Oligocene-Miocene time beween the Philippine Sea and the Eurasia plates. The Circum-Izu Massif Serpentine Belt encircles the northern end of the Izu Massif, almost parallel to a trace of the present plate boundary, the Sagami Trough and the Suruga Trough. The Circum-Izu Massif serpentinite had been mainly emplaced into or protruded onto the Oligocene-Miocene sediments. The Circum-Izu Massif peridotite, mainly harzburgite, is characterized by the mineral assemblage, olivine (Fo_<90-92>) + opx + cpx + chromian spinel (Cr#, ca. 0.5) +/- plagioclase (An_<90>), and is a low-pressure (ca. 5 kb) restite with or without melt impregnation. It may represent the uppermost mantle of the Shikoku Basin, which had begun opening during Oligo-Miocene, protruded along the transcurrent plate boundary at the northern end of the Philippine Sea plate ( the Shikoku Basin ) , by analogy with the protrusion of abyssal peridotites along the oceanic fracture zone. It had been accreted to the Eurasia plate by the ocean-ward bending of the central Honshu arc during the opening of the Sea of Japan in the Miocene. Detrital chromian spinel grains in the Oligocene-Miocene sediments in the Circum-Izu Massif Serpentine Belt memorize some ancestral peridotites with arc-mantle characteristics which had been protruded in the Belt before the present Circum-Izu Massif serpentinite (peridotite). The ancestral peridotites and dioritic rocks frequently associated with the sepentinites were derived from the deep parts of the Paleo-Izu-Bonin arc, which had been split and disrupted by the Shikoku Basin opening. Picritic basalts of intra-plate type closely associated with the Circum-Izu Massif serpentinite were possibly derived from the mantle plume which had caused the opening..
収録刊行物
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- 静岡大学地球科学研究報告
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静岡大学地球科学研究報告 20 175-185, 1994-03
静岡大学地球科学教室
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詳細情報 詳細情報について
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- CRID
- 1390853649732891392
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- NII論文ID
- http://ci.nii.ac.jp/naid/110000413356
- 110000413356
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- NII書誌ID
- AN00103190
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- HANDLE
- 10297/321
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- NDL書誌ID
- 3889047
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- ISSN
- 03886298
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- 本文言語コード
- ja
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- 資料種別
- departmental bulletin paper
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- データソース種別
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- JaLC
- IRDB
- NDLサーチ
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用可