Laboratory Tests

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.

Chemical analysis

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

Cu-Pb ore

Microscopic observation

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-ray diffraction

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

Microfossils observation

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
TEL:+81-3-5405-2172 /