Earth Sciences Research Journal: Envíos recientes
Mostrando documentos 21-40 de 373
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A multivariate statistical approaches on physicochemical characteristics of ground water in and around nagapattinam district, cauvery deltaic region of tamil nadu, india
Ground water samples collected at different locations in and around the Nagapattinam district were analyzed for their physicochemical characteristics. The ground water samples were collected from fifty two dug and deep ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Characterization of Band-E Narges magnetite iron ore for mineral processing
The Band-e Narges deposit is located about 70 km northeast of the city of Badrud, northern Isfahan province. Band-E Narges ore deposit is mining for magnetite. To release valuable minerals, crushing and grinding implemented ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Diagenetic controls on reservoir quality of tight sandstone: A case study of the Upper Triassic Yanchang formation Chang 7 sandstones, Ordos Basin, China
Through a range of petrological techniques, the petrology, diagenesis, pore characteristics, and controlling factors on the regional variations of reservoir quality of the Chang 7 sandstones were studied. These sandstones, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Fractal characteristics of reservoir structural fracture: a case study of Xujiahe Formation in central Yuanba area, Sichuan Basin
The reservoir structural fractures have excellent fractal characteristics, as well as self-similarities. Based on the fractal theory, the surface fractal characteristics of faults and the fractal characteristic of fractures ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Analysis of Mechanical Characteristics and Instability Law of Inverse Fault under the Influence of Mining
In order to explore the mechanical characteristics and stability of the reverse fault under the influence of mining, an inverse mechanics model has been built under work face mining conditions, according to the law of ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Comparison between Numerical and Analytical Analysis of the Dynamic Behavior of Circular Tunnels
Dynamic behavior of underground structures is controlled by the strain field imposed by wave propagation and by the interaction between rock mass and structures. Shear and pressure waves propagating in the plane of the ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Automatic Identification of Calcareous Lithologies Using Support Vector Machines, Borehole Logs and Fractal Dimension of Borehole Electrical Imaging
In this research algorithms of support vector machine (SVM) and a logic function were applied to identify automatically sections of carbonate rocks in wells located in the former Barco Concession, Catatumbo Basin - Colombia. ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau
Understanding and modeling the downstream dilution process of a landslide triggered debris flow is the foundation for recognizing the boundary condition and dilution mechanism of this type of debris flow, and this serves ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Study of the relationship between hydro-mechanical soil behavior and microstructure of a structured soil
Structured soils, such as residual laterites or volcanic ashes, abound in tropical regions. The hydro-mechanical behavior of these soils is clearly related to their structure. New techniques based on microstructural studies ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Seasonal Hydrological and Meteorological Time Series
Time series models are often used in hydrology and meteorology studies to model streamflows series in order to make forecasting and generate synthetic series which are inputs for the analysis of complex water resources ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Letter from editor
During the outgoing year, successful events took place, as Latin American and Caribbean Seismological Commission Assembly, on July 23, 24, 25, in Bogotá, Colombia. In that academic event, the relevant results associated ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Study of the mineralization potential of the intrusives around Valis (Tarom-Iran)
The study area is located in northwestern Iran in the central Iran zone, specifically the western Alborz sub-zone south of the Tarom-Hashtjin metallogenic zone. The exposed rock units in this area generally include Eocene ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Land ecological security assessment for Yancheng city based on catastrophe theory
Based on actual land use in Yancheng city, this paper establishes the ecological security of the land index system from the perspectives of economy, society and ecological environment. Using the catastrophe theory and ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Spatial distribution of sediment pollution in the Khajeh Kory River using Kriging and GIS
The aim of this research was to study of sediment pollution conditions in the river bed of Khajeh Kory, which passes from the southern border of the Caspian Sea in Astara City. To determine the pollution of river bed ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Critical undrained shear strength of sand-silt mixtures under monotonic loading
This study uses experimental triaxial tests with monotonic loading to develop empirical relationships to estimate undrained critical shear strength. The effect of the fines content on undrained shear strength is analyzed ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Compression ratio of municipal solid waste simulation using artificial neural network and adaptive neurofuzzy system
The compression ratio of Municipal Solid Waste (MSW) is an essential parameter for evaluation of waste settlement. Since it is relatively time-consuming to determine compression ratio from oedometer tests and there exist ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Estimating shear wave velocity using acceleration data in Antakya (Turkey)
This manuscript presents a site response analysis and an estimation of S-wave velocity that are dependent on acceleration data. First, existing data, such as density, seismic wave velocity, and soil cross-sections, are ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Geostatistical Analysis for delineating sterile inclusions in Sidi Chennane' phosphatic series, Morrocco
The anomalies detected in phosphatic series of Sidi Chennane, one of phosphatic basins in Morocco, hinder the proper exploitation of phosphate levels and the assessing phosphate reserves seems incorrect. The purpose of ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Severity Classification of a Seismic Event based on the Magnitude-Distance Ratio Using Only One Seismological Station
Seismic event characterization is often accomplished using algorithms based only on information received at seismological stations located closest to the particular event, while ignoring historical data received at those ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Shear-wave velocity structure of Australia from Rayleigh-wave analysis
The elastic structure beneath Australia is shown by means of S-velocity maps for depths ranging from zero to 400 km, determined by the regionalization and inversion of Rayleigh-wave dispersion. The traces of 233 earthquakes, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal.