書誌事項
- タイトル別名
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- チュウブ チホウ チュウオウ コウゾウセン ソイ ニ ロシュツスル マイロナイ
- Whole-rock major element composition of the mylonites along the Median Tectonic Line, central Japan
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説明
The whole-rock major element composition of the mylonites in the Kashio shear zone along the Median Tectonic Line in the vicinity of Takato-Ichinose and Kashio, Nagano Prefecture were analysed by X-ray fluorescence spectrometry, together with those of the Hiji tonalites. The mylonites were tentatively classified into three types based on mesoscopic occurrences of feldspar porphyroclasts : porphyroclastic type, fine-porphyroclastic type and fine-grained type. The porphyroclastic type is characterized by coarse-grained feldspar porphyroclasts in a fine-grained matrix containing quartz, feldspar and phyllosilicate aggregates. The fine-porphyroclastic type seems to be well-deformed porphyroclastic mylonites, so that the size of feldspar porphyroclasts is smaller than that within the porphyroclastic type due to intense grain size reduction. The fine-grained type contains only a few feldspar porphyroclasts in a well-banded fine-grained matrix. There exists no systematic difference between the chemical compositions of these three types of mylonites. The SiO_2 contents range from 51 to 73 wt.%. Concentrations of TiO_2,FeO, MnO, MgO, K_2O and P_2O_5 Were proportioned to SiO_2 content but tend to be scattered at SiO_2 > 70 wt.%. The chemical compositions of the Hiji tonalites are indistinguishable from those of the mylonites, consistent with the idea that the Hiji tonalite is a source rock of the three types of mylonites.
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 24 1-13, 1997-07
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
- 1390009224802765056
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- NII論文ID
- http://ci.nii.ac.jp/naid/110000413375
- 110000413375
- 10003977689
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- NII書誌ID
- AN00103190
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- HANDLE
- 10297/348
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- NDL書誌ID
- 4292658
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- ISSN
- 03886298
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用可