Geologic Structures of the Field of Metallic Mineralizations in the Central Hokuroku District, Akita Prefecture
スポンサーリンク
概要
- 論文の詳細を見る
Lithologic characters and stratigraphic succession of the Miocene formations in this area can be summarized, from oldest to youngest, as follows: Formation III; rhyolite and basalt in the Early-Middle Miocene (Nishikurosawa stage): Formation IV; alternations of mudstone and tuff in the Middle Miocene (Nishikurosawa-Onnagawa stage): Formation V; alternations of mudstone and tuff breccia in the Middle-Upper Miocene (Onnagawa stage).<BR>The tectonic elements are three uplift belts and two basins. They are separated by NNE-trending faults. Analyses of isopach and lithologic mud-tuff ratios of the formations support the conclusion that the pyroclastic sedimentations were controlled by differential movements of the elements, and submarine volcanisms took place along the boundaries between the uplift and basin blocks. The base metal mineralizations of veins and some black ore deposits are associated with the volcanisms and confined in the Formations III and IV.
- 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