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The Budo Mountains is located in northern part of Niigata Prefecture and is exposed in an area covering more than 250 square kilometers. It consists of Iwafune granitoids, which are divided into six lithological types ; porphyritic biotite granite (PBG), biotite granite (BG), garnet two-mica granite (GTMG), two-mica granite (TMG), quartz diorite (QD) and granodiorite (GD). The six rock types can be assigned to three rock groups on the basis of petrological observations as follows : biotite granite group(BG-group ; PBG and BG), and tow-mica granite group (TMG-group;GTMG and TMG) and diorite group (D-group;QD and GD). Most of the granitoids in this area are attributed to BG-group. This group is composed of quartz, plagioclase, potassium feldspar, biotite and minor amounts of accessory minerals. Especially, the PBG contains potassium feldspar megacrysts and sometimes shows schlieren layering owing to the concentration of biotite and plagioclase. 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  1. 050 理学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
  1. 0 資料タイプ別
  2. 01 学術雑誌論文

新潟県北部、葡萄山塊に分布する岩船花崗岩類中の斑状黒雲母花崗岩の2段階分別結晶作用

http://hdl.handle.net/10191/17810
http://hdl.handle.net/10191/17810
cd6d887e-d4b3-4ee2-bbac-8f868f3aa4fe
名前 / ファイル ライセンス アクション
ZC_107(8)_515-530.pdf ZC_107(8)_515-530.pdf (2.9 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2012-04-11
タイトル
タイトル 新潟県北部、葡萄山塊に分布する岩船花崗岩類中の斑状黒雲母花崗岩の2段階分別結晶作用
タイトル
言語 en
タイトル 新潟県北部、葡萄山塊に分布する岩船花崗岩類中の斑状黒雲母花崗岩の2段階分別結晶作用
言語
言語 jpn
キーワード
主題Scheme Other
主題 Iwafune granitoids
キーワード
主題Scheme Other
主題 porphyritic biotite granite
キーワード
主題Scheme Other
主題 peraluminous granite
キーワード
主題Scheme Other
主題 fractional crystallization
キーワード
主題Scheme Other
主題 Cretaceous
キーワード
主題Scheme Other
主題 Budo Mountains
キーワード
主題Scheme Other
主題 Niigata Prefecture
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
その他のタイトル
その他のタイトル Two atage fractional crystallization of the porphyritic biotite granite from the Iwafune granitoids in the Budo Mountains, Niigata Prefecture, Japan
著者 加々島, 慎一

× 加々島, 慎一

WEKO 41471

加々島, 慎一

Search repository
志村, 俊昭

× 志村, 俊昭

WEKO 41472

志村, 俊昭

Search repository
著者別名
識別子 41473
識別子Scheme WEKO
姓名 Kagashima, Shin-ichi
著者別名
識別子 41474
識別子Scheme WEKO
姓名 Shimura, Toshiaki
抄録
内容記述タイプ Abstract
内容記述 The Late Cretaceous to Paleogene Iwafune granitoids of are distributed around the border between Niigata and Yamagata Prefectures, Japan. The Budo Mountains is located in northern part of Niigata Prefecture and is exposed in an area covering more than 250 square kilometers. It consists of Iwafune granitoids, which are divided into six lithological types ; porphyritic biotite granite (PBG), biotite granite (BG), garnet two-mica granite (GTMG), two-mica granite (TMG), quartz diorite (QD) and granodiorite (GD). The six rock types can be assigned to three rock groups on the basis of petrological observations as follows : biotite granite group(BG-group ; PBG and BG), and tow-mica granite group (TMG-group;GTMG and TMG) and diorite group (D-group;QD and GD). Most of the granitoids in this area are attributed to BG-group. This group is composed of quartz, plagioclase, potassium feldspar, biotite and minor amounts of accessory minerals. Especially, the PBG contains potassium feldspar megacrysts and sometimes shows schlieren layering owing to the concentration of biotite and plagioclase. BG-group has medium SiO_2 content ranging from 69 to 77 weight percent and is peraluminous. Modal and bulk chemical compositions show that BG-group has curved trend. Mass balance calculation indicates that the BG-series magma can be derived from common parental magma through two-stage fractional crystallization of potassium feldspar, biotite and plagioclase. The first stage is characterized by plagioclase- and biotite-rich fractionation, and the second stage is characterized by fractionation of biotite and potassium feldspar more than plagioclase.
抄録
内容記述タイプ Abstract
内容記述 新潟県北部の蒲萄山塊には,後期白亜紀から古第三紀の岩船花崗岩類が分布する.蒲萄山塊南部の岩船花崗岩類は,斑状黒雲母花崗岩,黒雲母花崗岩,ざくろ石両雲母花崗岩,両雲母花崗岩,石英閃緑岩,花崗閃緑岩に区分された.これらは産状,構成鉱物,全岩-鉱物組成から3つの岩類に分けられる.主要岩相である斑状黒雲母花崗岩の結晶作用を検討した.モード組成および全岩化学組成から屈曲したトレンドが得られ,2段階の分別結晶作用が考えられる.マスバランス計算により,第1段階では斜長石と黒雲母が主な分別鉱物であり,第2段階では斜長石よりもカリ長石+黒雲母の分別が多かったことが導き出された.
書誌情報 地質学雑誌
en : 地質学雑誌

巻 107, 号 8, p. 515-530, 発行日 2001-08
出版者
出版者 日本地質学会
ISSN
収録物識別子タイプ ISSN
収録物識別子 00167630
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AN00141768
著者版フラグ
値 publisher
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