Analytical and experimental studies on partitioning of elements and diffusion kinetics in some sulfide minerals in ore deposits

矿床中某些硫化物矿物的元素分配和扩散动力学的分析和实验研究

基本信息

批准号：
11440157
负责人：
MIZUTA Toshio
金额：
$ 9.66万
依托单位：
Akita University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

High-performance ArF laser abration equipment for induced coupled plasma mass spectrometer (ICP-MS) were introduced in 1999 during this research period for analyses of covering various kinds of geological samples.Research targets are experimental partitioning data of elements, ore textures and diffusion kinetics of some sulfide minerals in ore deposits. Distribution experiment of coblat and nickel were carried out for the minor concentration between pyrite and pyrrhotite. Ore textures of some resources minerals in ores from seafloor hydrothermal ore deposits and in ores of the Cyprus-type copper deposit, Oman are precisely described for genetic interpretation of ore deposit from kinetic processes of trace element partitioning, crystal size distribution, and the diffusion nature of sulfide minerals.1. Using ICP-MS with the laser aser abration system, spot analyses of trace elements (100 micrometer in diameter) were performed for trace elemental analysss to obtain partitioning values of coblat and nickel between pyrite and pyrrhotite. Synthetic experiments for Co-Ni distribution between pyrite and pyrrhotite reveal that the short time duration of less than 30 days are not enough to achieve equilibrium conditions even 500℃.2. Spot analyses data are usefully applied to a natural samples for geological interpretation of formation temperatures by the this microanalyses of direct fluid inclusions in quartz and sphalerite.The ICP-MS analysis data are compared to PIXE analysis results for chemical conditions of mineralization processes such as tungsten deposit of the Yamaguchi skarn deposit, Iwate Prefecture and as alteration and Cu-Zn mineralization processes of seafloor hydrothermal deposits in the Desmos caldera, Manus basin, western Pacific Ocean. The microanlytical data of trace elements and stable isotopes of O, C and H were presented at the International Geological Conference in Oman.

在1999年，在本研究期间，引入了用于诱导耦合血浆质谱仪（ICP-MS）的高性能ARF激光磨料设备，用于分析覆盖各种地质样品的分析。研究是对元素，矿石纹理和扩散性矿床的实验分配数据。对黄铁矿和黄铁矿之间的少量浓度进行了clat和镍的分布实验。精确地描述了阿曼的矿石中某些资源矿物质的矿物质矿物质以及塞浦路斯型铜沉积物中的矿石矿物质的矿石质地，精确地描述了阿曼的矿石矿物质，用于从痕量元素分配，晶体尺寸分布和硫化物矿物质的扩散性质的矿石沉积物的遗传解释。使用ICP-MS与激光ASER ABR系统一起使用痕量元素（直径为100微米）的斑点分析以获得痕量元素分析，以获得coblat和黄铁矿和黄铁矿之间的coblat和镍的分配值。对于黄铁矿和黄铁矿之间的二-NI分布的合成实验表明，少于30天的短时间持续时间不足以达到相等的条件，即使是500℃.2。 Spot analyses data are usefully applied to a natural sample for geologic interpretation of formation temperatures by the this microanalyses of direct fluid inclusions in quartz and sphalerite.The ICP-MS analysis data are compared to PIXE analysis results for chemical conditions of mineralization processes such as tungsten deposit of the Yamaguchi skarn deposit, Iwate Prefecture and as alteration and Cu-Zn mineralization processes of西太平洋曼努斯盆地的Desmos火山口水热沉积物。 O，C和H的微量元素和稳定的同位素的微晶数据在阿曼的国际地质会议上介绍。