We conduct laboratory tests on geological samples such as rocks, minerals, soils, ores, etc. in collaboration with domestic and overseas laboratories.
Please contact us for inquiries and quotations at the following e-mail address.
Using analytical instruments such as X-ray fluorescence spectroscopy (XRF), inductively coupled plasma mass spectrometer (ICP-MS) and inductively coupled plasma emission spectrometer (ICP-AES), the major and trace components (gold, silver, rare metals, rare earth elements, etc.) and the concentration of isotopic composition are measured. In addition, qualitative analysis and surface analysis (element distribution concentration) of elements on the sample surface by electron probe micro analyzer (EPMA) and radiometric dating (K-Ar method, U-Pb method, Rb-Sr method, etc.) are conducted.
Hydrothermal mineralization sample
We prepare specimens for microscopic observation of rocks and ores and perform observations of such to identify mineral compositions and textures with a polarizing microscope. This is effective in determining rock types and identifying minerals contained in ores.
Polarizing microscopic photo of rock thin section
Reflecting microscopic photo of ore
X-rays are irradiated to samples which are finely pulverized, and the minerals contained in samples are identified from the measured X-ray diffraction chart. This is effective as a means to identify clay minerals contained in altered rocks in the exploration of mineral resources and geothermal resources.
X-ray diffraction chart of altered clay in geothermal field
Physical property test of rocks
We measure the resistivity, charging rate and magnetic susceptibility of rocks using the equipment shown in the photos. These tests are used to evaluate the amount of metal minerals and the strength of alteration in rocks in the exploration of mineral resources and geothermal resources.
Measuring resistivity and charging rate of rock
Measuring magnetic susceptibility of rock
Relative age and sedimentary environment can be estimated by identifying types of foraminifera, radiolarians and diatoms contained in rocks and ocean floor sediments.
Table of relative age of foraminifera and nannofossil
Mode measurement of rock thin section
The content (area ratio) of each mineral in rock is determined by mode measurement under microscopic observation of rock thin sections.
Fluid inclusion measurement
By examining the trapped fluid present when rocks and ores were formed, it is possible to know the temperature, pressure, fluid concentration, etc. when the fluid was taken in minerals.
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Sumiko Resources Exploration & Development Co., Ltd
Exploration and Environmental Survey Department
Address: 33 Mori Bldg. (5F), 8-21 Toranomon 3-chome,
Minato-ku, Tokyo, 105-0001, Japan