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Structural evolution of multiple ductile shear zone system in the Ryoke belt, Kinki Province
https://doi.org/10.15027/53144
https://doi.org/10.15027/531447ce7c2b0-5158-49f5-b624-a05fc2bdee48
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
JSHUCE_10-2_267.pdf (24.9 MB)
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| Item type | デフォルトアイテムタイプ_（フル）(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-18 | |||||||
| タイトル | ||||||||
| タイトル | Structural evolution of multiple ductile shear zone system in the Ryoke belt, Kinki Province | |||||||
| 言語 | en | |||||||
| 作成者 |
SAKAKIBARA, Nobuo
× SAKAKIBARA, Nobuo
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| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 内容記述 | ||||||||
| 内容記述 | The ductile shear zones which developed in the Kinki Province of the low P/T Ryoke metamorphic belt, are mainly divided into the Ryoke southern marginal shear zone (RSMSZ) and Ryoke inner shear zone (RISZ). The RSMSZ is located at relatively lower structural level than the RISZ. The RSMSZ in the Kayumi district is regarded as subhorizontal ductile shear zone with westward directed sense of shear. The mylonitization related to the formation of the RSMSZ occurred at the temperature conditions of 470-350 °C (LT, low temperature to MT, medium temperature) during 83-60 Ma. The stretching direction which is represented by the mylonitic lineation is mostly oriented to EW. Strain analysis suggests that in the RSMSZ a NS directed stretching presumably occurred before the LT and MT mylonitization. On the other hand, in the RISZ (the Kasagi, Oikawa, Hakusan-Joryu and Takehara district) the mylonitization characterized by NS stretching occurred at 350-600 °C (LT to HT). A top to the southward directed sense of shear dominates for the LT and MT mylonitization in the RISZ. The HT mylonitization occurred under coaxial plane strain regime. The temporal change of stretching direction from NS to EW in the RSMSZ appears to coincide with the change of subduction direction of the oceanic plate from NS to EW at ca. 85 Ma, suggested by the deformation temperature and mineral isotopic age in the RSMSZ. However, the kinematic data suggest that during the LT and MT mylonitization, the stretching directions were spatially partitioned into NS in the RISZ and EW in the RSMSZ. The partitioning of stretching direction is different in the different structural level in the continental crust. The spatial variation of stress field, which is indicated by dyke-orientations in the Ryoke metamorphic belt may be responsible for the spatial partitioning of stretching direction (heterogeneous flow). | |||||||
| 言語 | en | |||||||
| 出版者 | ||||||||
| 出版者 | Hiroshima University | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | departmental bulletin paper | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| ID登録 | ||||||||
| ID登録 | 10.15027/53144 | |||||||
| ID登録タイプ | JaLC | |||||||
| 収録物識別子 | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 0075-4374 | |||||||
| 収録物識別子 | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AA11095875 | |||||||
| 開始ページ | ||||||||
| 開始ページ | 267 | |||||||
| 書誌情報 |
Journal of science of the Hiroshima University. Series C, Earth and planetary sciences Journal of science of the Hiroshima University. Series C, Earth and planetary sciences 巻 10, 号 2, p. 267-332, 発行日 1995-02-01 |
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| 旧ID | 53144 | |||||||
