ログイン
言語:

WEKO3

  • トップ
  • ランキング
To
lat lon distance
To

Field does not validate



インデックスリンク

インデックスツリー

メールアドレスを入力してください。

WEKO

One fine body…

WEKO

One fine body…

アイテム

{"_buckets": {"deposit": "2aa673be-fc0f-457f-b134-1c1b5a54cb67"}, "_deposit": {"id": "11147", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "11147"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00011147", "sets": ["696"]}, "author_link": ["33726", "33727", "33728", "33729"], "item_10_biblio_info_6": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2005-11", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1-3", "bibliographicPageEnd": "48", "bibliographicPageStart": "32", "bibliographicVolumeNumber": "153", "bibliographic_titles": [{"bibliographic_title": "Physics of the earth and planetary interiors", "bibliographic_titleLang": "en"}]}]}, "item_10_description_4": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "Partially molten regions in the lowermost mantle have been inferred to exist by the discovery of the ultralow velocity zone (ULVZ). We consider a small-scale stagnant-lid convection in the D′′layer, following [Solomatov, V.S., Moresi, L.N., 2002. Small-scale convection in the D′′layer. J. Geophys. Res., 107, doi:10.1029/2000JB000063.], to investigate the relationship between partial melt and seismic anisotropies often found in the D′′layer. Such convection can bring melts in the D′′layer from the ULVZ, deform the melt inclusions, and accordingly would profoundly affect seismic structures including anisotropies. We therefore calculate the deformation history of partially molten regions at the base of the D′′layer which is heated from below, using a 2D model with a strongly temperature dependent viscosity. An initially isotropic partial melt is strongly deformed by the viscous stress caused by thermal convection, and becomes anisotropic by shape preferred orientation (SPO) of melt inclusions, whose aspect ratios are of the order of 101 to 102 at the base of the plume and become as large as 103 to 104 in the plume head. We calculate the effective elastic constants for such anisotropic media which contain deformed melt inclusions, and obtain the seismic velocity for a horizontal ray path. We find that the horizontally averaged velocity profile can be correlated with convective patterns. If melting occurs not only in the ULVZ but extends to the top of hot regions of the D′′layer, the vertical seismic profile consists of three layers corresponding to the base, conduit and head of a rising plume. The lowermost layer, which corresponds to the ULVZ, becomes strongly anisotropic with VSH\u003eVSV. The deformation and alignment of the melt, rather than the melting itself, is primarily responsible for reducing the seismic velocity. On the other hand, in the conduit, the anisotropy is of VSV\u003eVSH type because of vertical alignment. In the plume head, the anisotropy is of VSH\u003eVSV type with a magnitude of about 2%. We discuss how shear wave anisotropy may be used to infer the temporal evolution of the D′′layer.", "subitem_description_language": "en", "subitem_description_type": "Abstract"}]}, "item_10_identifier_60": {"attribute_name": "URI", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/2237/13018"}]}, "item_10_publisher_32": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "Elsevier", "subitem_publisher_language": "en"}]}, "item_10_select_15": {"attribute_name": "著者版フラグ", "attribute_value_mlt": [{"subitem_select_item": "author"}]}, "item_10_source_id_7": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "00319201", "subitem_source_identifier_type": "PISSN"}]}, "item_10_text_14": {"attribute_name": "フォーマット", "attribute_value_mlt": [{"subitem_text_value": "application/pdf"}]}, "item_1615787544753": {"attribute_name": "出版タイプ", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_ab4af688f83e57aa", "subitem_version_type": "AM"}]}, "item_access_right": {"attribute_name": "アクセス権", "attribute_value_mlt": [{"subitem_access_right": "open access", "subitem_access_right_uri": "http://purl.org/coar/access_right/c_abf2"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Okamoto, Tatsuto", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "33726", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Sumita, Ikuro", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "33727", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Nakakuki, Tomoeki", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "33728", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Yoshida, Shigeo", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "33729", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2018-02-20"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "PEPI2005.pdf", "filesize": [{"value": "4.4 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_note", "mimetype": "application/pdf", "size": 4400000.0, "url": {"label": "PEPI2005.pdf", "objectType": "fulltext", "url": "https://nagoya.repo.nii.ac.jp/record/11147/files/PEPI2005.pdf"}, "version_id": "870bf51f-1bb8-4bc5-81eb-8e1eddce54b1"}]}, "item_keyword": {"attribute_name": "キーワード", "attribute_value_mlt": [{"subitem_subject": "D′′layer", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Partial melt", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Deformation", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Plumes", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Ultralow velocity zone", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Deformation of a partially molten D” layer by small-scale convection and the resulting seismic anisotropy and ultralow velocity zone", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Deformation of a partially molten D” layer by small-scale convection and the resulting seismic anisotropy and ultralow velocity zone", "subitem_title_language": "en"}]}, "item_type_id": "10", "owner": "1", "path": ["696"], "permalink_uri": "http://hdl.handle.net/2237/13018", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2010-03-29"}, "publish_date": "2010-03-29", "publish_status": "0", "recid": "11147", "relation": {}, "relation_version_is_last": true, "title": ["Deformation of a partially molten D” layer by small-scale convection and the resulting seismic anisotropy and ultralow velocity zone"], "weko_shared_id": -1}
  1. B100 理学部/理学研究科
  2. B100a 雑誌掲載論文
  3. 学術雑誌

Deformation of a partially molten D” layer by small-scale convection and the resulting seismic anisotropy and ultralow velocity zone

http://hdl.handle.net/2237/13018
http://hdl.handle.net/2237/13018
ef268ec0-eecd-4cdc-97c1-58259974d84b
名前 / ファイル ライセンス アクション
PEPI2005.pdf PEPI2005.pdf (4.4 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2010-03-29
タイトル
タイトル Deformation of a partially molten D” layer by small-scale convection and the resulting seismic anisotropy and ultralow velocity zone
言語 en
著者 Okamoto, Tatsuto

× Okamoto, Tatsuto

WEKO 33726

en Okamoto, Tatsuto

Search repository
Sumita, Ikuro

× Sumita, Ikuro

WEKO 33727

en Sumita, Ikuro

Search repository
Nakakuki, Tomoeki

× Nakakuki, Tomoeki

WEKO 33728

en Nakakuki, Tomoeki

Search repository
Yoshida, Shigeo

× Yoshida, Shigeo

WEKO 33729

en Yoshida, Shigeo

Search repository
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
キーワード
主題Scheme Other
主題 D′′layer
キーワード
主題Scheme Other
主題 Partial melt
キーワード
主題Scheme Other
主題 Deformation
キーワード
主題Scheme Other
主題 Plumes
キーワード
主題Scheme Other
主題 Ultralow velocity zone
抄録
内容記述 Partially molten regions in the lowermost mantle have been inferred to exist by the discovery of the ultralow velocity zone (ULVZ). We consider a small-scale stagnant-lid convection in the D′′layer, following [Solomatov, V.S., Moresi, L.N., 2002. Small-scale convection in the D′′layer. J. Geophys. Res., 107, doi:10.1029/2000JB000063.], to investigate the relationship between partial melt and seismic anisotropies often found in the D′′layer. Such convection can bring melts in the D′′layer from the ULVZ, deform the melt inclusions, and accordingly would profoundly affect seismic structures including anisotropies. We therefore calculate the deformation history of partially molten regions at the base of the D′′layer which is heated from below, using a 2D model with a strongly temperature dependent viscosity. An initially isotropic partial melt is strongly deformed by the viscous stress caused by thermal convection, and becomes anisotropic by shape preferred orientation (SPO) of melt inclusions, whose aspect ratios are of the order of 101 to 102 at the base of the plume and become as large as 103 to 104 in the plume head. We calculate the effective elastic constants for such anisotropic media which contain deformed melt inclusions, and obtain the seismic velocity for a horizontal ray path. We find that the horizontally averaged velocity profile can be correlated with convective patterns. If melting occurs not only in the ULVZ but extends to the top of hot regions of the D′′layer, the vertical seismic profile consists of three layers corresponding to the base, conduit and head of a rising plume. The lowermost layer, which corresponds to the ULVZ, becomes strongly anisotropic with VSH>VSV. The deformation and alignment of the melt, rather than the melting itself, is primarily responsible for reducing the seismic velocity. On the other hand, in the conduit, the anisotropy is of VSV>VSH type because of vertical alignment. In the plume head, the anisotropy is of VSH>VSV type with a magnitude of about 2%. We discuss how shear wave anisotropy may be used to infer the temporal evolution of the D′′layer.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 Elsevier
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
ISSN
収録物識別子タイプ PISSN
収録物識別子 00319201
書誌情報 en : Physics of the earth and planetary interiors

巻 153, 号 1-3, p. 32-48, 発行日 2005-11
フォーマット
application/pdf
著者版フラグ
値 author
URI
識別子 http://hdl.handle.net/2237/13018
識別子タイプ HDL
戻る
0
views
See details
Views

Versions

Ver.1 2021-03-01 19:12:06.071792
Show All versions

Share

Mendeley Twitter Facebook Print Addthis

Cite as

エクスポート

OAI-PMH
  • OAI-PMH JPCOAR
  • OAI-PMH DublinCore
  • OAI-PMH DDI
Other Formats
  • JSON
  • BIBTEX

Confirm


Powered by WEKO3


Powered by WEKO3