Metalliferous shales of Neogene in Japan : characterization, age, distribution, formative processes and environment

日本新近纪含金属页岩：特征、年龄、分布、形成过程和环境

• 批准号: 07640635
• 负责人: KOMURO Kosei
• 金额: $ 1.41万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640635/
• 关键词: Neogene; Green tutt region; metalliterous shale; muolstone; chemical composition; heavy metal; sultur isotope; Tormative environment; 頁岩; 化学組成; 微量元素; 黄鉄鉱ノジュール; 炭酸塩岩層; 黒鉱鉱床; イオウ同位体比; 時空分布

In orfer to understand the genesis of the metalliferous mudstones and shales, i.e., age, distribution, formative processes and environment, in the Green tuff region of northeastern Japan, mineralogy, chemistry and sulfur isotopes of mudstones and shales in the region had carefully been investigated. The results obtained are reported here. Important results are as follows :Chemical analysis data for a series of whole-rock samples from the taiheizan district reveal that the uppermost Uyashiai Mudstone (Nishikurosawa stage) and the iowermost onnagawa Hard Mudstone (Onnagawa stage) are enriched in Zn, Cu, Pb and Ba compared to the upper onnagawa Hard Mudstone and Funakawa Black Mudstone (Funakawa stage). Sulfur isotopic rations (delta<@D134@>D1S<@D2CDT@>D2) of whole-rock sulfides from the Uyashinai Mudstone range from -35* to -40*, those from the Onnagawa Hard Mudstone range from +5* to -10*, and those from Funakawa Black Mudstone range from (]SY.+-。[)0* to -30*.It should be noted that rem … More arkable enrichment in Zn, Cu, Pb and Ba and abrupt change of sulfur isotopes can be observed just at the vary Nishikurosawa/Onnagawa boundary.Ore-microscopic observation has revealed that the mudstones of the upper Nishikurosawa stage (eg. the Ohmatagawa Mudstone) commonly contains micro-grains of sphalerite and chalcopyrite in association with framboidal and euhedral aggregates of pyrite. The sphalerite often has an unique texture like a sort of chalcopyrite-diseased one and almost always fills in the tests of fossil foraminifera. The sphalerite formation is thus suqqested to be due to bacterial sulfate reduction coupled with decomposition of organic matter during the early diagenetic stage. It is worth noting here that the Ohmatagawa Mudstone with the unique occurrence of zinc and copper sulfides is stratigraphically correlatable to the currently-accepted Kuroko-bearing horizon.On the basis of the results obtained, an attempt is made to construct a qenetical model of the metalliferous mudstones and shales, and to evaluate paleoenvironmental controls on the middle Miocene metallogensis. Less

在Orfer中了解了日本东北部的绿色凝灰岩地区，米拉多利，化学和泥石和阴影的绿色凝灰岩区域中，已仔细研究了金属泥岩和阴影的起源，即年龄，分布，形成过程和环境。在这里报告了获得的结果。重要结果如下：来自太极区的一系列全岩体样品的化学分析数据表明，最高的Uyashiai Mudstone（Nishikurosawa阶段）和iower iower Onnagawa Hard Mudstone（Onnagawa阶段）在Zn，Cu，PB和Ba架上富含Ondstonagsonagsonagsonagnagsonakaakaakaakaakaakawa andstone andstonagsonakanagsonakakawa andstonagsonakanagnagnagsonagnagsonagnagsonagnagsonagnagsonakahaak funstonagnagnagsonak andstone funstonakahaak andstone。来自uyashinai Mudstone的全摇滚硫化物的硫同位素口粮（delta <@d134@> d1s <@d2cdt@> d2）从-35*到-40*不等，来自Onnagawa Hard Mud Mudsone的硫化物范围从 +5*到-10*到-10*，以及来自Funakawa Black Mudstone的范围。 that rem … More arkable enrichment in Zn, Cu, Pb and Ba and abrupt change of sulfur isotopes can be observed just at the vary Nishikurosawa/Onnagawa boundary.Ore-microscopic observation has revealed that the mudstones of the upper Nishikurosawa stage (eg. the Ohmatagawa Mudstone) commonly contains micro-grains of sphalerite and黄铜矿与黄铁矿的Framboidal和Euhdral聚集体相关。 Spherite通常具有独特的质地，例如一种芝麻酸盐，几乎总是填充化石有孔虫的测试。因此，Suqqest旋转岩的形成是由于硫酸细菌还原与早期成岩阶段的有机物分解相结合。在这里值得注意的是，具有锌和硫化铜铜的独特发生的欧马谷川泥岩在地层上与当前所接受的黑色含量的地平线相关。较少的

项目成果

Komuro, K.(Ito, T): "Geochemictry of sediments and authigenic minerals in and around the decollement zone of the northern Barbados ridge accretionary prism" Proc.ODP Sci.Results. 156. 171-182 (1997)

Komuro, K.（Ito, T）：“巴巴多斯北部海岭增生棱柱滑脱带及其周围沉积物和自生矿物的地球化学”Proc.ODP Sci.Results。

Horikawa, Y., Komuro, K.他: "Migration,fixation,and long-term preservation of uranium in the Tono ura-nium deposits,Japan:a mineralogical app-roach" Internat.Conf.Geochem.Migration Behavior Actinides Fission Products in Geosphere (Migration'97). 6. 87 (199

Horikawa, Y., Komuro, K. 等人：“日本远野铀矿床中铀的迁移、固定和长期保存：一种矿物学方法”Internat.Conf.Geochem.迁移行为锕系元素地圈中的裂变产物（迁移97）。 6. 87 (199)。

Wilder,M.N., Komuro,K.他: "Salinity,methyl farnesoate titers,and osmotic and ionic regulation in Macrobrachium rosenbergii" Pioc.Internat.Congr.Comparative Endocrinol.13. 93-96 (1997)

Wilder, M.N., Komuro, K. 等人：“罗氏沼虾的盐度、法尼索酸甲酯滴度以及渗透压和离子调节”Pioc.Internat.Congr.Comparative Endocrinol.13 (1997)。

小室 光世: "「固体試料分析の基礎」中の4章「蛍光X線分析」" 農林水産省農林交流センター, 91-132 (1997)

小室光代：“《固体样品分析基础》第 4 章‘荧光 X 射线分析’”农林水产省农林交流中心，91-132 (1997)

八田 珠郎・小室 光世 他: "蛍光X線による粘土鉱物の迅速分析" 理学電機ジャーナル. 27. 19-24 (1996)

Juro Hatta、Mitsuyo Komuro 等人：“使用荧光 X 射线快速分析粘土矿物”Rigaku Denki Journal，27. 19-24 (1996)。