Recently added articles from Earth Sciences Research Journal:
Mapping subsurface formations on the eastern Red Sea coast in Jordan using geoelectrical techniques: geological and hydrogeological implications.(Report)
Dec 01, 2007; ... ABSTRACT During 2006, geoelectrical measurements using the vertical electrical sounding (VES) method were conducted on the eastern Red Sea coast in Jordan, using the SYSCAL-R2 resistivity instrument. The objectives of the study were (i) to evaluate the possibility of mapping of ...
Hydraulic characteristics of sedimentary deposits at the J-PARC proton-accelerator, Japan.(Japan Proton Accelerator Research Complex)(Report)
Dec 01, 2007; ... ABSTRACT Hydraulic characteristics of sediments were investigated at J-PARC for the purpose of site characterization in relation with the construction of Japan's largest proton-accelerator. A total of 340 samples extracted from 9 exploratory wells were examined by standard ...
Self-potential signals caused by eruptions of the Galeras volcano--Colombia.(Report)
Dec 01, 2007; ... ABSTRACT The National Institute of Geology and Mining, INGEOMINAS--Colombia, and the Federal Institute for Geosciences and Natural Resources, BGR--Germany, perform since 1997 as a joint venture multi-parameter measurements at the Galeras volcano, in the southwest of Colombia ....
Accurate gravity anomaly interpolation: a case-study in Cameroon, Central Africa.(Report)(Case study)
Dec 01, 2007; ... ABSTRACT Many treatments in geodesy and geophysics require regularly gridded gravity anomalies. The gridding of gravity data needs interpolation. For the predicted data to be accurate, the smoothest type of gravity anomaly should be used along with the most indicated prediction ...
Clustering on dissimilarity representations for detecting mislabelled seismic signals at Nevado del Ruiz volcano.(Report)
Dec 01, 2007; ... ABSTRACT Classification of seismic signals at Colombian volcanoes has been carried out manually by visual inspection. In order to reduce the workload for the seismic analysts and to turn classification reliable and objective, the use of supervised learning algorithms has been ...
Geometric model of the Nazca plate subduction in Southwest Colombia.(Report)
Dec 01, 2007; ... ABSTRACT A geometric model for the subduction of the Nazca plate beneath the South American plate in southwestern of Colombia is proposed based on the relocation of hypocenters of local and distant earthquakes. By means of the simultaneous inversion of teleseismic P and SH body ...
Crustal thickness variations and seismicity of Northwestern South America.
Jun 01, 2007; ... ABSTRACT Any uncompensated mass of the northern Andes Mountains is presumably under pressure to adjust within the Earth to its ideal state of isostatic equilibrium. Isostasy is the ideal state that any uncompensated mass seeks to achieve in time. These pressures interact with ...
The Camaqua basin modelling: tectonostratigraphy through integration of geophysical (gravimetry, well log) and remote sensing data.
Jun 01, 2007; ... ABSTRACT A tectonostratigraphic study of the Camaqua Basin, formed by Neoproterozoic to Eopaleozoic volcano-sedimentary units, is herein presented. Based on lineaments obtained through LANDSAT TM images and geophysical methods, four structural domains were recognized. The ...
Paleontological study of the echinoderms in the Qom formation.(central Iran)
Jun 01, 2007; ... ABSTRACT The Qom formation was formed in the Oligo-Miocene during the final sea transgression in Central Iran (Figure 1). The best outcrop is located in the vicinities of the Qom City, approximately 130 km at the south of Tehran. In general, the great heights of the zone are the ...
Methodology implemented for the 3D-seismic modelling using Gocad and norsar 3D software applied to complex areas in the Llanos foothills.
Jun 01, 2007 ... ABSTRACT A methodology has been applied in order to use seismic modeling and generate synthetic data which are compared with results from field data. This methodology has been applied to the Siriri area and subsequently it has been extended to other geographic areas. To fully ...
Cross-section generation of various geo-scientific features wihtout contour digitization using a Visual C++ based software application 'Vigat 2005'.
Jun 01, 2007; ... ABSTRACT Cross-section can be described as a two dimensional dataset where the horizontal distances are represented on the x-axis and the depth on the y-axis. A cross-section is a window into the subsurface. This work presents the construction of cross sections with the help of ...
Geoinformation density: a criterion on ANH Block negotiation.
Jun 01, 2007; ... ABSTRACT Based on the general information included within the ANH Exploration and Production Information Service, the information distribution densities of the Colombian territory were determined. These densities are referred in seismic length per square kilometer and amounts ...
Attenuation of diffracted multiples with an apex-shifted tangent-squared radon transform in image space.
Dec 01, 2006; ... ABSTRACT In this paper, a method to attenuate diffracted multiples with an apex-shifted tangent-squared Radon transform in angle domain common image gathers (ADCIG) is proposed. Usually, where diffracted multiples are a problem, the wavefield propagation is complex and the ...
Stacking on common reflection surface with multiparameter traveltime.
Dec 01, 2006; ... ABSTRACT Commonly seismic images are displayed in time domain because the model in depth can be known only in well logs. To produce seismic sections, pre and post stack processing approaches use time or depth velocity models whereas the common refection method does not, instead ...
Seismic hazard map for the Italian territory using macroseismic data.
Dec 01, 2006; ... Abstract A seismic hazard map, in terms of macroseismic intensity, is proposed for the Italian continental territory and Sicily, which has a 10% probability of exceedance in 50 years. The methodology used here was first proposed by Cornell (1968), which requires information ...
Isostatically disturbed terrain of northwestern Andes mountains from spectrally correlated free-air and gravity terrain data.
Dec 01, 2006; ... ABSTRACT 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 extreme topography. The current plate boundaries of the area are mainly interpreted ...
Geology of the Florencia gold--telluride deposit (Camaguey, Cuba) and some metallurgical considerations.
Dec 01, 2006 ... ABSTRACT This paper describes the results from a study of the Florencia gold-telluride deposit in Central Cuba, including mineralogical, petrographical, microprobe and chemical analysis. Valuable information is provided for the exploration, mining and processing of gold ores ...
Dissimilarity-based classification of seismic signals at Nevado del Ruiz Volcano.
Dec 01, 2006; ... ABSTRACT Automatic classification of seismic signals has been typically carried out on feature-based representations. Recent research works have shown that constructing classifiers on dissimilarity representations is a more practical and, sometimes, a more accurate solution for ...
Improving vertical and lateral resolution by stretch-free, horizon-oriented imaging.
Dec 01, 2006; ... ABSTRACT 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 long-offset imaged data, far beyond what is ...