Determination of the Neotectonic Movements through Geophysical Methods in the Elbasani-Kruja-Lezhe Region

2013 ◽  
Author(s):  
P.L. Leka ◽  
P.N. Naço ◽  
F.V. Vinçani ◽  
P.K. Kosho
Keyword(s):  
Geophysical Methods

scholarly journals DETERMINATION OF PRODUCTION WELL'S COLLECTORS POROSITY IN SOUTH-GEOLOGICAL AREA

2016 ◽  
pp. 25-29
Author(s):  
G. E. Stroyanetskaya
Keyword(s):  
Electrical Resistivity ◽  
Geophysical Methods ◽  
Caliper Measurement ◽  
Porosity Coefficient

The problems of collectors at the stage of calculating the reserves in operating incline directional wells, penetrated on clay, polymer-clay solution, polymer washing liquid with hydrochloric-calcium foundation were considered. The electrical resistivity of the solution and the washing liquid from 0.1 to 1 O·mm. According to geophysical methods, establishing of the criteria for the allocation of the collectors requires coring. The main methods for the isolation of collectors are lateral, microlaterolog survey and caliper measurement. The techniques of the gas-saturated collectors porosity coefficient determination were considered.

scholarly journals Subsurface investigations of landslides using geophysical methods : geoelectrical applications in the Swabian Alb (Germany)

2006 ◽  
Vol 61 (3) ◽  
pp. 201-208 ◽  
Author(s):  
R. Bell ◽  
J.-E. Kruse ◽  
A. Garcia ◽  
T. Glade ◽  
A. Hördt
Keyword(s):  
Soil Moisture ◽  
Geophysical Methods ◽  
Economic Damage ◽  
The World ◽  
Subsurface Investigation ◽  
3D Information ◽  
Moisture Conditions ◽  
2D And 3D ◽  
2D Resistivity

Abstract. Landslides occur frequently all over the world, causing at times considerable economic damage, injuries and even death. In order to improve hazard assessment, common landslide types of a given region need to be investigated in detail. While traditional techniques of subsurface investigation are expensive and only provide point information, geophysical methods are suitable tools for gathering 2D and 3D information on the subsurface quickly, reliably and cost-effectively. In this study, the suitability and limitations of 2D resistivity for the determination of landslide extent, structure and soil moisture conditions are presented. For this purpose, two identical profiles were taken during a two-month period. Significant differences in electrical resistivity (>1000 Ωm) due to varying soil moisture conditions were observed. Using various inversion parameters, it was possible to model two distinct subsurface images. Regrettably, the sliding plane could not be detected reliably, possibly due to the homogeniety of the landslide material and underlying bedrock.

scholarly journals The Usefulness of Seismic Surveys for Geotechnical Engineering in Karst: Some Practical Examples

Geosciences ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 406
Author(s):  
Mario Bačić ◽  
Lovorka Librić ◽  
Danijela Jurić Kaćunić ◽  
Meho Saša Kovačević
Keyword(s):  
Large Strain ◽  
Geotechnical Engineering ◽  
Geophysical Methods ◽  
Near Surface ◽  
Distinctive Features ◽  
Seismic Surveys ◽  
Karstic Features ◽  
Engineering Investigation ◽  
Control Campaign

Having in mind uncertainties linked with the nature of rock masses, it is a challenge for geotechnical engineers to characterize them in a credible manner, especially if the rock mass in question is a notoriously complex karst with its distinctive features such as voids and discontinuities. A large range of geophysical methods are useful tools in the characterization efforts and their utilization in karst environments nowadays is a non-negotiable requirement, even though near-surface scattering significantly affects the acquired data. This paper demonstrates the versatile applications of seismic geophysical methods for geotechnical engineering in karst, from mapping of near-surface karstic features to the application of elastic wave velocities in determination of small to large strain stiffness of karst. The highlighted practical examples offer a step forward from the traditional interpretation of seismic surveys, making them a prosperous tool in geotechnical engineering investigation works, design and quality control campaign.

scholarly journals CRSP, numerical results for an electrical resistivity array to detect underground cavities

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Amin Amini ◽  
Hamidreza Ramazi
Keyword(s):  
Electrical Resistivity ◽  
Geophysical Methods ◽  
Electrode Array ◽  
Electrode Configuration ◽  
Electrode Arrays ◽  
Wide Range ◽  
Underground Cavities ◽  
Conventional Electrode

AbstractThis paper is devoted to the application of the Combined Resistivity Sounding and Profiling electrode configuration (CRSP) to detect underground cavities. Electrical resistivity surveying is among the most favorite geophysical methods due to its nondestructive and economical properties in a wide range of geosciences. Several types of the electrode arrays are applied to detect different certain objectives. In one hand, the electrode array plays an important role in determination of output resolution and depth of investigations in all resistivity surveys. On the other hand, they have their own merits and demerits in terms of depth of investigations, signal strength, and sensitivity to resistivity variations. In this article several synthetic models, simulating different conditions of cavity occurrence, were used to examine the responses of some conventional electrode arrays and also CRSP array. The results showed that CRSP electrode configuration can detect the desired objectives with a higher resolution rather than some other types of arrays. Also a field case study was discussed in which electrical resistivity approach was conducted in Abshenasan expressway (Tehran, Iran) U-turn bridge site for detecting potential cavities and/or filling loose materials. The results led to detect an aqueduct tunnel passing beneath the study area.

Determination of vector Euler parameters

2018 ◽  
Vol 932 (2) ◽  
pp. 2-9 ◽  
Author(s):  
A.A. Kluykov
Keyword(s):  
Geophysical Methods ◽  
Kinematic Parameters ◽  
Euler Parameters ◽  
Tectonic Plates ◽  
Euler Vector ◽  
Kinematic Models ◽  
Fortran Language ◽  
Mathematical Processing ◽  
Good Agreement

Improving the accuracy of points coordinates determination from geodetic networks with the use of modern space geodesy techniques (GPS, SLR, VLBI, DORIS) identified factors that were earlier considered as insignificant. Such factors include the movement of tectonic plates. This made possible the transition from the static coordinate system model to the kinematic one. For the effect of the tectonic plates movement on the points coordinates you must know kinematic parameters of the tectonic plates movement – the Euler vector parameters – angular velocity of the tectonic plates rotation and the poles rotation coordinates (latitude and longitude) of tectonic plates. Many modern kinematic models of tectonic plates are used observations, performed by geophysical methods, to estimate kinematic parameters of the tectonic plates movement. The article presents the algorithm that allows to estimate the parameters of the tectonic plates movement from mathematical processing of geodetic measurements carried out at points distributed over the surface of tectonic plates. Based on the presented algorithm the EULER program was developed in the algorithmic FORTRAN language, which was experimentally tested. The analysis results showed that the parameters of the Euler vector obtained by the EULER program are in good agreement with the results obtained by using ITRF 2005 and ITRF 2008 models.

Geophysical research of the rock massif in underground mine conditions

2020 ◽  
pp. 255-263
Author(s):  
T. F. Kharisov ◽  
V. V. Mel’nik ◽  
O. D. Kharisova ◽  
A. L. Zamjatin
Keyword(s):  
Rock Mass ◽  
Geophysical Methods ◽  
Oil Industry ◽  
High Accuracy ◽  
Underground Mine ◽  
Geophysical Research ◽  
Structural Inhomogeneities ◽  
Spectrum Density ◽  
Radar Sensing

Geophysical methods of research of rock mass are one of the most effective ways of solving various problems in mining and are widely used in mining, gas and oil industry, as well as in science. They allow remote search and assessment works, detection of structural inhomogeneities, voids, contact zones of various media in the rock mass with sufficient high accuracy. The article presents research and comparative analysis of geophysical methods of geophysical sensing and spectral seismo-profiling in underground mine conditions with determination of permissible tasks for which these methods are capable. In complex geophysical studies, methods of spectral seismo-profiling and geo-radar sensing in underground mine conditions have been applied. Measurements were made to search for different objects and at different angles to the object being searched. The use of geophysical methods made it possible to detect the metal shelf under the bulked rock mass with the separation of the boundaries of two tiers of the shelf during vertical measurements. In the process of searching for the underlying excavation in the mass during vertical geophysical measurements, which were carried out 20 meters from the shaft, a change in spectrum density at a depth of about 55 m was detected, which coincides with the actual location of the required mine working. The results of the search for caverns in the rock mass, when taking measurements at an angle to the object sought, showed the absence of sufficiently explicit boundaries of the caverns.

Détermination de la géométrie et des propriétés physiques du pergélisol discontinu de la région de Schefferville

1977 ◽  
Vol 14 (3) ◽  
pp. 431-443 ◽  
Author(s):  
Maurice K.-Seguin
Keyword(s):  
Electrical Resistivity ◽  
Regional Scale ◽  
Seismic Refraction ◽  
Geophysical Methods ◽  
Near Surface ◽  
Vertical Extension ◽  
Discontinuous Permafrost ◽  
Propriétés Physiques ◽  
Lower Limits

The various parameters used to predict on a regional scale the lateral and vertical extension of permafrost are the following: surface temperature, thermal conductivity of rocks, and geothermal flow configuration. Locally this type of data is generally not sufficient and far too inaccurate. The use of geophysical methods at the surface and in boreholes in addition to existing thermal data helps to improve the degree of accuracy in the prediction of spatial distribution of permafrost in a given area. These geophysical methods include seismic refraction, electrical resistivity, and spontaneous and induced polarizations.Because of the properties of permafrost, seismic refraction at surface is useful only to determine the top of the permafrost whereas electrical resistivity (electric logging near surface) allows the determination of the upper and lower limits of permafrost. Seismic refraction, resistivity, and spontaneous and induced polarizations in boreholes were deemed more promising to determine masses or lenses of permafrost.Moreover, it was possible to correlate temperature and electrical resistivity measurements in boreholes, thus allowing the drawing of isothermal curves from electric logging in areas of continuous and discontinuous permafrost, at least when it is 'marginal'.The data for this study were obtained from the experimental station at Schefferville, Québec. [Journal Translation]

scholarly journals Geodetic, geophysical and geographical methods in landslide investigation: Luar case study

2020 ◽  
Vol 164 ◽  
pp. 01014
Author(s):  
Vladislav Zaalishvili ◽  
Khisa Chotchaev ◽  
Dmitry Melkov ◽  
Olga Burdzieva ◽  
Boris Dzeranov ◽  
...  
Keyword(s):  
Geophysical Methods ◽  
Reference Object ◽  
Anthropogenic Activity ◽  
Static State ◽  
Natural Processes ◽  
Geodynamic Processes ◽  
Central Caucasus ◽  
Active Landslide

According to the variety and the intensity of dangerous natural processes occurence, the Greater Caucasus can serve as a natural laboratory, where geodynamic processes of a different order proceed continuously. One of the most destructive natural processes are the landslides. A reference object in this regard is the Luar landslide, which has included all the extreme features of landslide structures known in the Central Caucasus, but has not revealed the secrets of its static state, the determination of which is the most important task of the scientific research. An active landslide formed as a result of anthropogenic activity (slope cutting ) is also considered. The mentioned objects were examined by the geodetic and geophysical methods. Appropriate monitoring systems have been created.

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