The engineering-geological position reveals the peculiarities of structure and physical-mechanical properties of bottom soil of the Barents and Kara seas. Consider the conditions for the formation of the latest sediments, their relationship with the repeated freezing and defrosting during the late Cenozoic, the peculiarities of polar lithogenesis. Regional factors of variability and features of variability of the physical-mechanical properties of bottom soil with depth are shown. Conclusions are made about the ambiguous influence of the historical-geological factors on physical-mechanical properties of soils. The role of soils, containing submarine gas hydrates, is shown.
This paper contains methods of gravity and magnetic data processing with evaluation of effective density and magnetic intensity of rocks. The most preferred method of 3D-processing so as to create three dimensional models of gravity and magnetic distribution is that one which count gravity and magnetic fields around a circle near the calculation point. It is highly effectively to use this method if there are some isometric objects. This algorithm leads to a geometry distortion of the resulting objects and a marked increase in predicted depth if examined bodies are twodimensional and overlie horizontal or aslope. This might cause errors in data interpretation.
Разработана концепция прогноза и поисков сульфидных медно-никелевых месторождений. На основе этой концепции создана технология прогноза и поисков с использованием комплекса геохимических и геофизических данных (грави-, магнито- и электроразведки). Новизна заключается в том, что реализована методология от «общего к частному», т.е. от построения геолого-геофизической модели изучаемого района и модели рудно-магматической системы к отдельно взятому рудному телу. Эффективность технологии доказана в Мончегорском рудном районе, где получен прирост прогнозных ресурсов меди, никеля и металлов платиновой группы. Удельные затраты на выявление единицы прогнозных ресурсов составляют 0,22 USD/т, или 0,003 % от стоимости выявленных ресурсов.
Electromagnetic radiation when using cellular phones can have a negative impact on humans. Studies of radiation types on a multilayer model of the human head made it possible to compile a program and perform numerical calculations.
Modern requirements for hydrochemical sampling of observation wells in the performance of hydrogeological research and groundwater monitoring are given. When sampling observation wells is recommended to pump out not less than 40 volumes of water from the borehole with a submersible pump. For determination of inorganic substances it is recommended to use complex mass-spectral and atomic emission analyses with inductively coupled plasma for 72 elements, which will allow to reject the results of analyses for which the conventional methods (with the sensitivity limit, close to the MAC) revealed exceeding the existing standards, for example for Cd, Li, Be.
Амгунь-Сихотэ-Алиньская горно-складчатая область, расположенная в низовьях реки Амур, представляет собой в геологическом отношении сложную по строению территорию, в пределах которой развиты породы интрузивной, эффузивной, вулканогенно-осадочной и осадочной формаций ...
