Geophysical Survey

About: Geophysical Survey is a facility organization based out in Obninsk, Russia. It is known for research contribution in the topics: Geology & Fault (geology). The organization has 308 authors who have published 256 publications receiving 3067 citations. The organization is also known as: Federal State Institution of Science Geophysical Survey of the Siberian Branch of the Russian Academy of Sciences.

Статистические характеристики решений системы стохастической модели переноса

Abstract: Предлагается стохастическая модель переноса, формализуемая с помощью дифференциальных уравнений со случайными параметрами. Получены явные выражения для математического ожидания и второй моментной функции решения соответствующих уравнений. Определена оценка степени влияния случайных факторов на систему в случае замены случайного коэффициента уравнения его математическим ожиданием. Приведен пример, демонстрирующий эффективность предлагаемого подхода в случае гауссова распределения случайных коэффициентов, позволяющий определить математическое ожидание и вторую моментную функцию в рамках модельных представлений. В качестве приложения рассматривается модель переноса тепла и влаги в приземном слое атмосферы.

Detection and evaluation on phosphorite mining environment contamination sources using ASTER and DEM

Abstract: The main environment contamination source of the phosphorite mining area, located in Huji city, Hubei province, China, was detected and evaluated using ASTER and DEM. Firstly, the featured spectrum that has unique diagnose spectral feature was generalized after analyzing the types and spectrum characteristics of the sample contamination source in the area. Secondly, the main contamination source of the area was recognized by means of principal component analysis using ASTER band 1-9. And the distributions of them were in accordance with that of phosphorite, carbonate and waste water. Finally, flow accumulation and catchment images were simulated using DEM and GIS. By analyzing the images of the flow accumulation, catchment and contamination source, the authors conclude that large scale opencast phosphorite mining and solid waste materials have damaged mining environment; the disordered piling of solid waste material has been boosting diffusion and migration of harmful and toxic matters; and all of these has damaged heavily ecological environment of lower reaches, and is the potential unsafe factor for that of Hanjiang river also. Keywords: ASTER, DEM, mining contamination, detection and evaluation on contamination sources 1.

Characteristics and Genetic Significance of Skarn in the Gaerqiong Cu-Au Deposit,Ge'gyai,Tibet

Abstract: The petrologic and mineralogical characteristics of the skarn in the Gaerqiong copper-gold deposit were studied in this paper.The skarn is mainly distributed in the contact zone between marble and quartz diorite as well as granite porphyry.It is distributed vertically as the zoning of marble-silicified hornfels-skarnized marble-wollastonite skarn-diopside skarn-garnet skarn-quartz diorite.A study of petrochemical,rare earth and trace element characteristics of the skarn-type ore shows that the skarn is calcic skarn,which has characteristics of weak negative Eu anomalies and LREE enrichment as well as the enrichment of large ion lithophile elements such as Rb,Th,Cs and U and the depletion of high field strength elements such as Hf,Ti and Y.The geochemical characteristics of skarn are controlled and affected by marbles,quartz diorite and granite porphyry.It is held that the skarn is genetically closely related to marble,quartz diorite and granite porphyry.Based on a discussion on the formation background of the Bangonghu-Nujiang metallogenic belt and the temporal-spatial relationship,the authors consider that the Gaerqiong deposit is a magmatic hydrothermal contact metasomatic type ore deposit.

Asphalt dielectric measurement accuracy improvement using asphalt surface temperature

Abstract: Dielectric values of cooling asphalt are obtained despite the presence of water on the surface thereof which effects the measured dielectric. The temperature of the surface of the asphalt is measured simultaneous or contemporaneous to a measurement of the dielectric, the former by way of an infrared camera and the latter by way of a ground penetrating radar transceiver, in embodiments of the disclosed technology. The ground penetrating radar moves with a roller on the surface of the asphalt and the camera can also move with and be mounted on the housing or can be separate, such as in a drone flying at a higher altitude than the asphalt and housing. Using a reference measurement for the mix design of the asphalt without water or with varying degrees of water, the changed dielectric due to the presence of water can be corrected to reveal the dielectric of the asphalt alone.