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Gamma ray spectrometry is widely used in geological mapping, soil surveying, mineral exploration, and regolith studies. The use of the method as a mapping tool requires an understanding of the geochemistry of the radioelements in rocks and soils, and the processes that effect their distribution and mobility. Mineralogical and geochemical studies of rocks and soils play a fundamental role in corroborating the interpretation of gamma ray spectrometry surveys, as they provide insight in the mode of occurrence of the radioelements and their petrogenetic or pedogenetic associations.
Gamma ray spectrometric mapping applications typically rely on an integrated approach. The gamma ray data are interpreted in combination with other airborne survey data such as magnetic and electromagnetic surveys, satellite images, and geological and soil maps.  Geographic information systems (GIS) are ideal for this integration task, because they provide image processing and enhancement functionality with dynamic map overlay, and cartographic functionality.
Man-made sources of radiation contribute to the radiation dose absorbed by the population.
The mapping of the location and activity of these sources is thus necessary. Nuclear technologies are now widely used in research and industry, energy power plants, health
services, and in the military. There is generally strict control on the installation and use of radioactive sources. But accidents do happen. Significant contributions to terrestrial gamma radiation were caused by reactor accidents at Windscale, UK (1958), and Chernobyl, USSR (1986), the loss of isotope sources in Mexico (1985) and Brazil (1987), and the re-entry of a nuclear-powered satellite in Canada (1978). Airborne and ground gamma ray methods are used for the location of lost sources and the mapping of areas contaminated by nuclear fallout.
Natural sources of radiation may also be concentrated in the environment by human activities.
Mining activities, including uranium, and thorium (mineral sands), redistribute and concentrate the radioelements. Coal and peat power plants (and associated ashes) redistribute radioactive materials, as does the use of phosphate and potassium fertilizers in cultivated land.


Mineral exploration




Geotechnical engineering


Environmental monitoring & etc


Ground water investigation

Ground geophysics survey

G&DS LLC provides ground geophysical services in data acquisition, processing and interpretation. We carry out following survey methods of the ground 


Borehole geophysics survey

We carry out the borehole logging to get in-situ physical properties of surrounding formation of subsurface area with wide range of logging tools, in open and cased boreholes. 


Consulting Service

G&DS LLC provides, together with our professional partners, the consulting services for the energy, mineral exploration, environmental, geotechnical, ground water and mining investigations .


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AOS-7, Tsergiin khotkhon-1B, 2nd khoroo Bayanzurkh district, Ulaanbaatar, Mongolia

Telephone:     +976 - 7007 8008
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