Geology and Geological Structure in the Hokuroku District, Akita Prefecture
スポンサーリンク
概要
- 論文の詳細を見る
The Hokuroku district, approximately 40km in W-E length and 20km in N-S, lies within the green-tuff region of the northeastern Japan, where several large "kuroko" deposits, such as Hanaoka, Shakanai, Kosaka and others, are located.<BR>Miocene formations characterized by pyroclastic rocks and violent volcanic activities in the Nishi kurosawa and Onnagawa stage deposited thickly in the central part of the district and thinly in the marginal part.<BR>Detailed geological survey and prospecting by drillings have been carried out for a long time at the Ha-naoka and Kosaka mines, especialy the Miocene volcanism and the stratigraphy of mudstone layers correlated by foraminiferas are investigated by systematic and accurate prospecting methods.<BR>Details of geological structure, stratigraphy and volcanism are given in three areas of Hana-oka, Shinsawa-Shigenai and Kosaka.
- 資源地質学会の論文
資源地質学会 | 論文
- 資源情報 2008年度秋季講習会 西南北海道の中新世熱水活動と金属鉱化作用
- 飛騨帯の石灰岩類 -地質特性・構成鉱物・岩石組織とドロマイトの産状-
- 飛騨帯神岡鉱床周辺の変閃緑岩・変斑れい岩類
- 神岡鉱床周辺のいわゆる伊西ミグマタイトとスカルン鉱(杢地鉱)中の単斜輝石の組成変化
- 北部北上山地南東部, 大谷山鉱山北方地域に分布する層状マンガン鉱床の層位学的研究