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Browsing Earth Sciences Research Journal by Title
Now showing items 161-180 of 373
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Implicaciones sismotectónicas de las soluciones mecanismo focal de algunos terremotos de la región central de colombia
Se han analizado las soluciones del mecanismo focal de veinte terremotos ocurridos a diferentes profundidades y ambientes tectónicos para establecer el marco sismotectónico de la región central del territorio colombiano. ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Improving vertical and lateral resolution by stretch-free, horizon-oriented imaging
The pre-stack Kirchhoff migration is implemented for delivering wavelet stretch-free imaged data, if the migration is (ideally) limited to the wavelet corresponding to a target horizon. Avoiding wavelet stretch provides ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Inferences on the geometry of the nazca plate in northwestern perú based on data collected by a local seismograph network
In Central and Southern Peru, local and teleseismic data allow having insights on the Wadati-Benioff zone (WBZ) geometry. In the region of Northern Perú, only rough estimates of the WBZ geometry have beenproposed, and were ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Influence of black shale composition on methane adsorption and gas content: Implications for gas storage in the Longmaxi black shales
The influence of shale composition on methane adsorption capability and gas content is investigated using 14 samples from Well YS8 in the southern Sichuan Basin, China. The results show that the Langmuir adsorption capacity ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China
More than 40% area of the Xixian New Area is a loess deposit region, and most of the loess landform is tableland and terrace where the thickness of loess is very large. Therefore, loess collapsibility will be the most ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Influence of pressure, coal structure and permeability on CBM well productivity at various burial depths in South Yanchuan Block, China
With a burial depth of 1000 m as the demarcation, the coal reservoir in South Yanchuan Block, China is divided into deep reservoir and shallow reservoir regions. A combination of coalbed methane well production data, well ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Integrated assessments of possible effects of hydrocarbon and salt water intrusion on the groundwater of iganmu area of lagosmetropolis, southwestern nigeria
Vertical electrical sounding (VES) and Induced Polarisation (IP) methods of geophysical survey were incorporated with physiochemical analysis of well water samples to determine vertical extent of petroleum-product ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Interpretation of aeromagnetic data using GIS to evaluate the geotectonic regime of the Sabinas Basin
The study present the use of Geographic Information System (GIS) to assess the geotectonic regimen of the Sabinas Basin. Initially, the GIS database was designed using geological and geophysical information (total magnetic ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Interpreting gravity anomalies in south cameroon, central africa
The area involved in this study is the northern part of the Congo craton, located in south Cameroon, (2.5°N - 4.5°N, 11°E - 13°E). The study involved analysing gravity data to delineate major structures and faults in south ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Interval velocity determination by downward continuation of the traveltime function: paraxial ray approximation
Presentamos un método para estimar las velocidades de intervalo, la profundidad y la geometría de los reflectores en modelos 3D que constan de un apilado de capas homogéneas e isotrópicas con velocidades y densidades ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Intraseasonal variability of rainfall over northern south america and caribbean region
Based on decadal (amounts for each ten days) precipitation data from meteorological stations situated in Northern South America and Caribbean region, a decadal precipitation index (DPI) was calculated in order to study ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
Hitherto unknown metacarbonate deposits constitute parts of the Cretaceous Mamfe embayment which straddles the border between south-eastern Nigeria and western Cameroon. The rock is characterisedby a high concentration of ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Isostatic Crustal Thickness Under The Tibetan Plateau And Himalayas From Satellite Gravity Gradiometry Data
The global gravity and crustal models are used in this study to determine the regional Moho model. For this purpose, we solve the Vening Meinesz-Moritz’s (VMM) inverse problem of isostasy de ned in terms of the isostatic ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Isostatically disturbed terrain of northwestern andes mountains from spectrally correlated free-air and gravity terrain data
Recently revised models on global tectonics describe the convergence of the North Andes, Nazca, Caribbean and South American Plates and their seismicity, volcanism, active faulting and extremetopography. The current plate ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Laboratory testing of the monotonic behavior of partially saturated sandy soil
This paper presents a laboratory study on the influence of the saturation evaluated in term of Skempton's pore pressur coefficientBon the behavior of Chlef sand. The study is based on drained and unnonno drained compression ...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. -
Late permian brachiopoda fauna in north-western iran
Late Permian marine sequence of in the North west of Iran in eastern Azarbaijan province in the Zal stratigraphic section has been selected To study brachiopods.Samples have been collected from Alibashi and Jolfa Formation. ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Letter from editor
Find available in your hands or just a click far this new number of the Earth Sciences Research Journal. It has been the product of a hard work not only for the authors but also for all people related to this project. ...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. -
Letter from editor
More than two decades ago we have been working steadily to providereaders and scientific community with articles on a broad range of geosciences field around the world. This achievement would not be possible without the ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal.
