Ore textures and mineralization processes of seafloor deposits formed by hydrothermal circulation-Comparative study of the recent seafloor hydrothermal mineralization and Kuroko-type ore deposits-

热液循环形成的海底矿床的矿石结构和成矿过程-近期海底热液成矿与黑子型矿床的比较研究-

• 批准号: 07640633
• 负责人: MIZUTA Toshio
• 金额: $ 1.66万
• 依托单位: Akita University
• 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 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640633/
• 关键词: sulfide minerals; diffusion in sulfides; pyrite; sphalerite; ore textures; Zn-Fe-S system; hydrothermal synthesis; Auger spectrometer; 黄銅鉱; Zn‐Ag‐S系鉱物

Ore-forming processes were examined from the experimental results of sulfide diffusion and distribution of trace elements between solution and sulfide minerals. Then, textures of ores from some seafloor hydrothermal deposits and Kuroko deposits are quantitatively analyzed from the viewpoint of crystal-size distribution theory.1.Diffusion rates in sulfide minerals in Zn-Fe-S system and stability relationships are examined by annealing experiments using mainly Auger spectrometer. Obtained results of diffusion rates are relatively higher the activation energy is lower than previous interdiffusion studies by electron probe analyzes.2.Distribution of trace elements such as cobalt and nickel between chloride solutions and pyrite were performed by hydrothermal synthesis method. Distribution coefficients were calculated from the data of Co^<2+>/Fe^<2+> ratios in solutions and pyrite from experiments at the temperatures of 200-300ﾟC.Distribution coefficients for recent seafloor hydrothermal ores and Kuroko-type ores with mineralized solutions are estimated from the data of the obtained distribution coefficients. Cobalt distribution in minerals are confirmed as an useful tool for the considerations of ore forming processes.3.Using the apparatus purchased in this study, the size (axs, perimeters, directions of elongation, and so on) of chalcopyrite blebs are analyzed with the image processing methods. Such kinetic phenomena of 'chalcopyrite disease' were interpreted from the experimentally determined diffusion results. Diffusion time span and growth rates of chalcopyrite grains in sphalerite crystals are discussed in submitted paper to the International Journal.

从硫化物扩散的实验结果和溶液和矿物质之间的痕量元素中检查了矿石的过程。通过使用抑郁仪的稳定速率进行退火实验来检查 - 系统和稳定关系。通过水文合成进行黄铁矿。从获得的分布系数估计的矿石和型矿石溶液中，矿石型矿石的矿石形成过程。3。使用本研究中购买的设备，用图像处理分析了尺寸（AXS，周围，伸长仪的方向）从实验性的扩散结果中解释了“辣椒疾病”的这种动力学现象。

项目成果

Lima, R.F.S., Mizuta, T.and Ishiyama, D.and Fujita, T.: "Tellurium-bearing minerals in Corrego Criminoso gold mining district, Goias State, Brazil." Rept.Research Inst.Natural Resources, Mining College, Akita Univ.No.61. 1-16 (1996)

Lima, R.F.S.、Mizuta, T.、Ishiyama, D. 和 Fujita, T.：“巴西戈亚斯州 Corrego Criminoso 金矿区的含碲矿物。”

Maglambayan,V.B.,Ishikawa,Y.,Mizuta,T.and Ishiyama,D.: "Ore textures and fluid inclusion studies of the UwamukiNo.4 Kuroko orebody,Akita Prefecture, Japan." Jour. Min. Coll. Akita Univ., Ser. A,. 8. 1-13 (1996)

Maglambayan，V.B.，Ishikawa，Y.，Mizuta，T. 和 Ishiyama，D.：“日本秋田县 Uwamuki No.4 Kuroko 矿体的矿石结构和流体包裹体研究”。

藤田豊久・藤光康宏・秋林智・水田敏夫: "乾燥した岩石における非抵抗の温度依存性に関する実験的研究." 日本地熱学会誌. 17. 111-121 (1995)

Toyohisa Fujita、Yasuhiro Fujimitsu、Satoshi Akibayashi 和 Toshio Mizuta：“干燥岩石中无电阻温度依赖性的实验研究。” 日本地热学会杂志 17. 111-121 (1995)。

Maglambayan,V.B.,Ishikawa,Y.,Mizuta,T.and Ishiyama,D.: "Ore textures and fluid inclusion studies of the Uwamuki No.4 Kuroko orebody,Akita Prefecture,Japan." Jour.Min.Coll.Akita Univ.,Ser.A,. 8. 1-13 (1997)

Maglambayan，V.B.，Ishikawa，Y.，Mizuta，T. 和 Ishiyama，D.：“日本秋田县 Uwamuki 4 号黑子矿体的矿石结构和流体包裹体研究”。

Lima,R.F.S.,Mizuta,T.Ishiyama,D.: "Tellurium‐bearing minerals in Corego Criminoso gold mining district, Goias State, Brazil.," Rept. Research Inst. Natural Resources, Mining College, Akita Univ.No.61. 1-12 (1996)

Lima, R.F.S.，Mizuta, T. Ishiyama, D.：“巴西戈亚斯州 Corego Criminoso 金矿区的含碲矿物”，秋田大学矿业学院自然资源研究所报告，第 61 号。 1-12 (1996)