Subjects -> EARTH SCIENCES (Total: 771 journals)
    - EARTH SCIENCES (527 journals)
    - GEOLOGY (94 journals)
    - GEOPHYSICS (33 journals)
    - HYDROLOGY (29 journals)
    - OCEANOGRAPHY (88 journals)

GEOPHYSICS (33 journals)

Showing 1 - 31 of 31 Journals sorted by number of followers
Geophysical Research Letters     Full-text available via subscription   (Followers: 201)
GIScience & Remote Sensing     Open Access   (Followers: 57)
Reviews of Geophysics     Full-text available via subscription   (Followers: 50)
Journal of Remote Sensing & GIS     Full-text available via subscription   (Followers: 38)
Physics and Chemistry of the Earth, Parts A/B/C     Hybrid Journal   (Followers: 9)
Journal of the Earth and Space Physics     Open Access   (Followers: 7)
New Zealand Journal of Geology and Geophysics     Hybrid Journal   (Followers: 6)
Artificial Intelligence in Geosciences     Open Access   (Followers: 6)
Eos, Transactions American Geophysical Union     Open Access   (Followers: 6)
Geothermal Energy     Open Access   (Followers: 5)
Research in Geophysics     Open Access   (Followers: 5)
NRIAG Journal of Astronomy and Geophysics     Open Access   (Followers: 4)
Journal of Earth Sciences and Geotechnical Engineering     Open Access   (Followers: 4)
Greenhouse Gases : Science and Technology     Hybrid Journal   (Followers: 4)
Journal of Environmental & Engineering Geophysics     Hybrid Journal   (Followers: 3)
Geodesy and Cartography     Open Access   (Followers: 2)
Geodesy and Cartography : The Journal of Committee on Geodesy of Polish Academy of Sciences     Open Access   (Followers: 2)
Geology, Geophysics and Environment     Open Access   (Followers: 1)
Contributions to Geophysics and Geodesy     Open Access   (Followers: 1)
Interpretation     Hybrid Journal   (Followers: 1)
Near Surface Geophysics     Open Access   (Followers: 1)
GEOMATICA     Hybrid Journal   (Followers: 1)
Chinese Journal of Geophysics     Full-text available via subscription   (Followers: 1)
Transportation Geotechnics     Full-text available via subscription   (Followers: 1)
Results in Geophysical Sciences     Open Access  
Energy Geoscience     Open Access  
Geomechanics and Geophysics for Geo-Energy and Geo-Resources     Hybrid Journal  
Geodesy and Geodynamics     Open Access  
Acta Geologica Polonica     Open Access  
Geof√≠sica internacional     Open Access  
GeoScience Engineering     Open Access  
Similar Journals
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GeoScience Engineering
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Online) 1802-5420
Published by VSB-Technical University of Ostrava Homepage  [2 journals]
  • Comparison of Table Bearing Capacity for Different Types of Foundation
           Soils / Rocks

    • Authors: David NEUMAN, Erik SOMBATHY, Jindřich VLČEK, Barbara MATUSZKOVÁ
      Pages: 105– - 105–
      Abstract: The aim of the publication was to compare the suitability of foundation soils on the basis of table (standard empirical) bearing capacity. Four basic groups of foundation soils were compared, which are fine-grained soils, sandy soils, gravelly soils and rocky soils. The scientific motivation for this comparison is that visualizing the difference between the suitability and unsuitability of a particular foundation soil / rock is one of the fundamental problems in engineering geology. Quantifying and visualizing the differences is very important for understanding the significance of different geological settings. Of all the foundation soil classes evaluated, the R1 rock soil group with a simple compressive strength greater than 150 MPa and a discontinuity distance greater than 600 mm achieves the highest table bearing capacity of 8 000 kPa. In contrast, the lowest table bearing capacity is achieved by the class of fine-grained foundation soils (F8) of clays with extremely high plasticity and soft consistency, where the value of this class is only 40 kPa. Keywords: Fine-grained soils; Gravelly soils; Rock mass; Sandy soils; Table bearing capacity.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0074
      Issue No: Vol. 68, No. 2 (2022)
       
  • Underground Mining Method Selection with the Application of TOPSIS Method

    • Authors: Stojance MIJALKOVSKI, Omer Faruk EFE, Zoran DESPODOV, Dejan MIRAKOVSKI, Daniela MIJALKOVSKA
      Pages: 125– - 125–
      Abstract: Multi-criteria decision-making methods are widely used to solve various problems in the industry, as well as to support the planning and designing industrial processes. Mining is a very complex and responsible activity, so when making a major decision, it is necessary to take into account several parameters and perform their detailed analysis. Due to the importance of proper decision making, multi-criteria optimization methods have a very wide application in mining. One of the most complex and important things in mining is the choice of mining method for underground exploitation, where the application of multi-criteria decision-making methods can help a lot in making the right decision. This paper will present the choice of the method of mining excavation by the TOPSIS method, according to which it was obtained that the Sublevel Caving is optimal for a given case. Keywords: Multi-criteria decision-making methods; TOPSIS method; Underground mining method selection.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0075
      Issue No: Vol. 68, No. 2 (2022)
       
  • Biological Marker Fingerprints of Crude Oils from Three Oilfields in the
           Central Niger Delta: Implication to Source Input, Conditions of
           Deposition, and Thermal Maturation

    • Authors: Timothy Chibuike ANYANWU, Ifeoma Ogeri AGBI, Botwe TAKYI, Joy Obiageli NJOKU, Uduak Anthony UGBAJA
      Pages: 134– - 134–
      Abstract: Crude oil samples recovered from three oilfields distributed within the central Niger Delta were used to investigate biological marker fingerprints, sources of organic matter, conditions of deposition, and thermal maturation. This was achieved by the application of gas chromatography-mass spectrometric (GC-MS) analyses on the saturated components of the crude oils. The biological marker ratios show low sterane/hopane (steranes/hopane ˂ 1) in the scope of 0.29 to 0.61 indicating that the crude oils initiated from rocks containing high terrigenous biota (mainly land plants). The n-alkanes distribution and the pristane/phytane ratios (0.63 to 2.08) suggested source deposition under oxic to suboxic environmental conditions. The percentage composition of C27, C28, and C29 steranes and oleanane index (18α (H)-oleanane/ C30 17α (H)-hopane) also indicated major contributions from terrigenous organic biota with minor marine source input. The studied crude oils have C32:22S/ (22S+22R) ratios in the scope of 0.55 to 0.64, and these values suggested high maturation level. This agrees with the oleanane index (0.64 to 0.95), CPI (0.92 to 1.06), C29: 20S/ (20S + 20R) sterane ratios (0.29 to 0. 61), Ts/(Ts+Tm) ratio (0.45 to 0.83) and moretane/C30 hopane proportion (0.16 to 0.24). Keywords: Biological marker; Depositional conditions; Niger Delta; Organic matter; Thermal maturation.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0076
      Issue No: Vol. 68, No. 2 (2022)
       
  • Application of GIS for the Control of Major Accident Hazards

    • Authors: Pavel ŠVEC, Jan SKŘÍNSKÝ
      Pages: 151– - 151–
      Abstract: The presented study discusses the importance of GIS in assessing the fire and explosion modelling involved in major accident hazards. The simulation of toxic dispersions in the atmosphere is especially dangerous for densely inhabited areas, or close to the sensitive environment, which are called the target systems. Therefore, mathematical-physical predictions from hazard modelling programs such as Areal Locations of Hazardous Atmospheres (ALOHA) have to be combined with a Geographic Information System (GIS) such as ArcGIS. This multidisciplinary approach allows experts to couple the consequences and the target systems in one representation of major accident hazards. This unique combination of the two programs allows us to calculate the consequences to human life for a real accident scenario case study. Description of methodical approach and four accident scenarios are investigated based on ALOHAs models for carbon monoxide release combined with ArcGIS for Liberty Ostrava a.s. as a case study. Keywords: ALOHA; ArcGIS; Carbon monoxide; Major accident hazards; Modelling of release and dispersion.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0077
      Issue No: Vol. 68, No. 2 (2022)
       
  • Determination of the Uniaxial Compressive Strength of Rocks from the
           Strength Index

    • Authors: Jindřich ŠANCER, Tomáš ŠIROKÝ, Vladimír KRENŽEL
      Pages: 158– - 158–
      Abstract: The uniaxial compressive strength (UCS) is classified as one of the basic mechanical properties of rocks, which is widely used in mining and construction practice. For example, it allows geomechanics to classify individual rocks and soils into groups with the same or similar mechanical properties. An example is the (RMR) Rock Mass Rating, Barton’s Q system. [1,2]. As a rule, only an indicative determination of the uniaxial compressive strength is sufficient for this classification. The uniaxial compressive strength is determined in the laboratory on regular test pieces. The preparation of these test bodies is often a time-consuming and costly process, and in some cases, the recommended shape cannot be prepared for a small amount of rock sample or, in the case of highly fractured and friable rock. For this reason, alternative methods for determining compressive strength are being sought. These methods are supposed to be faster and cheaper and to provide results directly in situ. The paper presents information obtained from the indirect determination of the uniaxial compressive strength according to the strength index measured with a field press on various rock types from the Czech Republic. Keywords: Point load index; Rock testing; Uniaxial compressive strength.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0078
      Issue No: Vol. 68, No. 2 (2022)
       
  • Separation of Copper from Acidic Etching Solutions

    • Authors: Martina UJHÁZY, Vladimír ČABLÍK, Hong N. VU, Radmila KUČEROVÁ
      Pages: 167– - 167–
      Abstract: This study deals with the issue of copper separation from acidic etching solutions formed during the process of production of printed circuit boards (PCBs) for the electrical and electronic industries. The article describes the selected methods of copper separation and summarizes the results of an experiment, in which the efficiency of copper recovery from the depleted acid solutions by the cementation and precipitation method was verified. In the process of cementation, iron in the form of metallic swarf was used as a precipitant. To verify the efficiency of the precipitation method, CaCO3 limestone, Ca(OH)2 calcium hydroxide and NaOH solution were used. During the measurement, the amount of Cu in the solution was observed for both methods in dependence on time, temperature, and pH.

      Keywords: Acid etching; Cementation; Copper; Precipitation; Printed circuit boards (PCB).
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0079
      Issue No: Vol. 68, No. 2 (2022)
       
  • Performance Assessment of Kinematic GNSS Positioning with Smartphones
           Based on Post-Processing of Raw Observations

    • Authors: Marek HALAJ, Michal KAČMAŘÍK
      Pages: 178– - 178–
      Abstract: In recent years, there have been significant technological advances in the development of common mobile devices. This brought progress also in the area of positioning with these devices. Allowing access to raw GNSS observations recorded by mobile devices opened possibilities to apply advanced positioning techniques in order to achieve higher positioning accuracy. The paper describes the results of kinematic measurements of a single-frequency Samsung Galaxy S10+ smartphone and a dual-frequency Samsung Galaxy Note10+ smartphone. Observations were repeatedly collected at a 1.76 km long test route in an urban environment at a pedestrian speed. Real-time positioning by autonomous method as well as collection of raw observations into RINEX format and their subsequent post-processing by differential techniques and Precise Point Positioning technique were realized. The achieved results were compared against a reference line representing the real trajectory and also against results of a geodetic grade GNSS receiver. Positioning accuracy of mobile devices ranged from the first decimetres to tens of metres, depending on the environment, tested smartphone and used post-processing technique. Dual-frequency smartphone Samsung Galaxy Note 10+ provided a better performance compared to the single-frequency device. Real-time positioning based on a simple autonomous technique and smoothing algorithm for route optimization reached lower positioning errors compared to all solutions based on collecting raw observations and their consequent post-processing with mentioned techniques.

      Keywords: GNSS; Positioning; Post-processing; Smartphone.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0080
      Issue No: Vol. 68, No. 2 (2022)
       
  • The Efficiency of Mechanized Mineral Processing Techniques to Recover Tin
           and Tantalum Ores. Case Study: Nyamatete Concession, Rwanda

    • Authors: Jules UWIZEYIMANA, Digne Edmond RWABUHUNGU RWATANGABO, Esperance IMANIRAFASHA, Vincent BARAYAGWIZA, Francois HATEGEKIMANA
      Pages: 195– - 195–
      Abstract: Mining activities have resulted in a large volume of tailings containing a certain proportion of lost minerals, making them a potential reprocessing opportunity, and information on tailings and mineral reprocessing is often scarce. In this study, a conceptual framework was established and used to produce meaningful information and knowledge from the tailings of the Nyamatete mine at HABATU Mining Company Limited (an ASM in Rwanda). Tailings particles were investigated based on the observed lithology to determine their distribution over the tailing dams, and a site-specific sampling approach and procedure were established. Sieving the collected samples, particle size analysis, and chemical analysis using XRF were chosen as methods for tailings characterization. Raw materials such as SnO2, minor Ta2O5, and Nb2O5 and elements of environmental importance such as Mn, Co, and as were observed but in small quantities are largely predominant in quartz vein, have been discovered in Nyamatete tailings. The comminution and gravity separation by mechanical reprocessing facilities improved Cassiterite recovery by 43.9 % compared to the artisanal processing method. SnO2 recovery of 19.4 % and 29.9 % with grades of 63.224 % and 76.6 % were obtained in pegmatite and quartz tailings respectively. According to a scoping study, the Habatu tailings have an appropriate grade, the valuable content occurs in a recoverable grain-size range, and the total ore amount scales with the required input for the reprocessing equipment. Tailings reprocessing with mechanized reprocessing equipment is advantageous because it improves efficiency while also treating the material with previously unknown quantities of ore, thereby significantly increasing the total recovery of processed Run of Mine.
      Keywords: Artisanal processing; Cassiterite; Coltan; Mechanized processing; Tailings.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0081
      Issue No: Vol. 68, No. 2 (2022)
       
  • Assessment of the Influence of Mine Waters on Surface Water Quality in
           Ostrava-Karvina Region

    • Authors: Lucie SYROVÁ, Lukáš BALCAŘÍK, Bohdana ŠIMÁČKOVÁ, Samaneh SHAGHAGHI
      Pages: 208– - 208–
      Abstract: The study deals with the evaluation of the effects of mining water on surface water quality in the Ostrava-Karvina region. The rivers were monitored from March 2019 to February 2021 and results were evaluated according to Government Regulation No. 401/2015 Coll. Mine waters are primarily loaded with dissolved substances, namely chlorides. Among others, the study focuses on parameters like temperature, pH, conductivity, sulphates, suspended solids, iron, manganese and radioactivity. The influence of mine water outlets was proven in the study, namely the influence of Jeremenko Water Pit on the monitored area of Ostravice River and the influence of Karvinský Potok tributary on the monitored area of Olše River. The Orlovská stružka did not have such a demonstrable effect on the monitored area of Odra River as the aforementioned outlets on other rivers. Keywords: Influence of mine waters; Karvinský potok; Mine waters; Orlovská stružka; Water Pit Jeremenko.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0082
      Issue No: Vol. 68, No. 2 (2022)
       
  • Bedload Estimation: Case of Wadi El-Hammam in the North-West of Algeria

    • Authors: Mohamed GLIZ, Boualem REMINI
      Pages: 213– - 213–
      Abstract: In Algeria, only the transport of suspended sediment is measured, the rate of bedload in the global transport of solids is estimated, approximately. Measures of bed load transport in the field are very costly, due to flow disturbances. As a result, evaluations of this type of sediment transport are difficult to carry out in the absence of databases. In this article, we tried to quantify this mode of transport at the wadi El-Hammam using the formula of Meyer-Peter and Müller. Formula that seems best adapted to the physical characteristics and flow conditions of the wadi studied. The results obtained show that the calculated bedload ratio is between 0.6 and 28 % of the suspension. The quantities transported annually are very large and irregular as they vary from 2.3 to 32 Mg.km-2.year-1, characterising the Mediterranean mountains and semi-arid environments. A good correlation was found between the daily bedload flow and the liquid flow, the obtained model Qs = aQb, can be easily used to estimate the bedload transport at the Hacine hydrometric station, located at the output and without data concerning this phenomenon. Keywords: Bed load transport; Fergoug; Meyer–Peter and Müller formula; Suspension; Wadi El-Hammam.
      PubDate: 2022-12-13
      DOI: 10.35180/gse-2022-0083
      Issue No: Vol. 68, No. 2 (2022)
       
 
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