Research on kinetics in water-rock system and mechanism of enrichment and dispersion of elements

水岩体系动力学及元素富集分散机理研究

• 批准号: 14204054
• 负责人: SHIKAZONO Naotatsu
• 金额: $ 33.45万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14204054/
• 关键词: water-rock interaction; hydrothermal alteration; weathering; kinetics; precipitation; partitioning of elements; epithermal gold deposits; rare earth elements; 熱水性鉱床; 黒鉱鉱床; 硫酸塩鉱物; 熱水変質作用; 土壌; 花崗岩; 水-岩石反応; 重金属元素; 地下水

Main results of this research are summarized as follows.(1)Hydrothermal experiments on the reaction between artificial seawater and volcanic rocks (basalt, dacite) indicate that the chemical compositions of final hydrothermal solution (Ca,Ba,Sr) depend on degree of intensity of hydrothermal alteration and chemical composition of hydrothermal solution. The genesis of barite, gypsum and anhydrite can be interpreted in terms of these results.(2)Geochemical behavior of elements in hydrothermal alteration can be clarified based on many analytical results of altered rocks in hydrothermal mining districts. The correlation between rare earth element contents, oxygen isotopic compositions and K content was found. This indicates that REE content is useful geochemical exploration index.(3)Distribution of quartz, barite and anhydrite in Kuroko mining area was clarified and interpreted in terms of precipitation kinetics-fluid flow model.(4)Elemental migration mechanism in weathering process was elucidated. It was found that adsorption and ionic exchange are important factors controlling the behavior of base metals and rare earth elements.

本研究的主要成果总结如下：(1)人工海水与火山岩（玄武岩、英安岩）反应的热液实验表明，最终热液的化学组成（Ca、Ba、Sr）取决于热液蚀变强度和热液的化学组成。这些结果可以解释重晶石、石膏和硬石膏的成因。(2)根据热液矿区蚀变岩的大量分析结果，可以澄清热液蚀变中元素的地球化学行为。发现了稀土元素含量、氧同位素组成与钾含量之间的相关性。这表明稀土元素含量是一项有用的化探指标。(3)利用降水动力学-流体流动模型，对Kuroko矿区石英、重晶石和硬石膏的分布进行了澄清和解释。(4)阐明了风化过程中的元素迁移机制。发现吸附和离子交换是控制贱金属和稀土元素行为的重要因素。

项目成果

硫黄同位体から推定した第三紀中新世瑞浪層群の堆積・続成環境

从硫同位素估算第三纪中新统瑞波群沉积及成岩环境

• 发表时间: 2004
• 期刊: 地質学雑誌 第110巻第6号
• 作者: 鹿園直建;武藤逸紀
• 通讯作者: 武藤逸紀

Shikazono, N., Ohtani, H., Takino, A., Sato, H.: "Mobility of rare earth elements and major elements during chemical weathering of volcanic soil profile in Kanto area, Japan"Goldschmidt Conference Abstracts (Geochim. Cosmochim. Acta). A707 (2002)

Shikazono, N.、Ohtani, H.、Takino, A.、Sato, H.：“日本关东地区火山土壤剖面化学风化过程中稀土元素和主要元素的迁移率”Goldschmidt 会议摘要（Geochim. Cosmochim.

Geochemical and Tectonic Evolution of Arc-Backarc Hydrothermal Systems : Implication for the Origin of Kuroko and Epithermal Vein-type

弧-弧后热液系统的地球化学和构造演化:对黑子和浅热液脉型起源的启示

• 期刊: Developments in Geochemistry (Elsevier) 8
• 作者: Yamasaki;M.;Naotatsu Shikazono
• 通讯作者: Naotatsu Shikazono

Arany S., Yoshioka N., Ishiyama D., Mizuta T.: "Investigation of trace element distribution in permanent root dentin by laser ablationinductively coupled plasma mass spectrometry"Akita Journal of Medicine. 31 no.2. 118-129 (2004)

Arany S.、Yoshioka N.、Ishiyama D.、Mizuta T.：“通过激光烧蚀电感耦合等离子体质谱法研究永久牙根牙本质中的微量元素分布”秋田医学杂志。

高橋美和, 水田敏夫, 石山大三, 木村純一, 高田実彌: "LA-ICP-MS分析法による菱刈鉱床含金石英脈の石英中の微量成分の特徴と鉱液の起源"資源地質. Vol.52, no.1,5. 51-67 (2002)

Miwa Takahashi、Toshio Mizuta、Daizo Ishiyama、Junichi Kimura、Miyaya Takada：“使用 LA-ICP-MS 分析分析菱狩矿床含金石英脉石英中的微量成分特征和矿物流体的来源”资源地质学，第 .52 卷，第 1,5 期（2002 年）。