Remotely sensed data has become an important source for geoscientists to understand the earth. With the rapidly growing availability of remotely sensed data and field surveys, there is an urgent demand to interpret and analyze these data. Remote sensing is a promising technology to support geohydrological studies, mainly because of the potential to observe areas and entire river basins rather t...

A lineament is a linear feature in a landscape which is an expression of an underlying geological structure such as a fault. Typically a lineament will comprise a fault-aligned valley, a series of fault or fold-aligned hills, a straight coastline or indeed a combination of these features. Fracture zones, shear zones and igneous intrusions such as dykes can also give rise to lineaments. Lineamen...

i Preface iii Summary v Introduction 1 Measurement techniques employed 3 Ground 3 Airborne 3 Magnetometer survey 4 Results 4 Ground control study 4 VLF survey 8 Bedrock geology and resistivity 8 Aeromagnetic survey results 13 Conclusions 13 Literature cited 13 Appendix A. Theory of electromagnetic resistivity si rveying 15 Appendix B. Magnetic surveying 19

Parameter estimation in aeromagnetics is an important tool for geologic interpretation. Due to aeromagnetic data being highly prevalent around the world, it can often be used assist understanding geology of area as a whole or locating potential areas further investigation mineral exploration. Methods that automatically provide information such location and depth source anomalies are useful inte...

The tectonic structures of the Mako area in Kédougou-Kéniéba inlier (KKI) were mapped with tele-analytical investigation which is validated by field data. This study based on different images processing particular: 1) colored combinations (1 to 5) and panchromatic (8) thematic mapping bands Landsat-8 (ETM+) satellite; 2) Digital Elevation Model (DEM) image Space Shuttle Radar Topography Mission...

Basin-and-range geothermal resources are typically fault-controlled, deep-circulation systems. They commonly occur beneath thick sequences of Tertiary and Quaternary basin-fill sediments which hinder understanding of fault geometries and faulting patterns. Recent experience at Dixie Valley and survey of the literature for other systems suggest a low-cost and rapid exploration strategy for estab...

Base-level maps (or “isobase maps”, as originally defined by Filosofov, 1960), express a relationship between valley order and topography. The base-level map can be seen as a “simplified” version of the original topographic surface, from which the “noise” of the low-order stream erosion was removed. This method is able to identify areas with possible tectonic influence even within lithologicall...

In this work, a methodological framework employing image processing techniques has been developed and applied on a LANDSATETM+ image of Alevrada, Greece. Pre-processing of the satellite image was followed by edge detection performed on band 5 of the ETM+ image in order to obtain proper input data to the lineament identification system. NDVI, PCA and ISODATA unsupervised classification were appl...

Abstract Magnetic methods of exploration have proved to be efficient and potential in the gold mineralization industry. New magnetic processing technologies aid improving process interpretation opportunity identification. In this work, we show possible application combined digital filters explore new localities with a well-known Au zone. Um Garayat (UG) region, southeastern desert, Egypt, is an...

This article shows the tectonic influence of Parnaíba River Lineament located in Basin through a paleontological finding Cretaceous age close to Permian sequence. The studied region is northeast State Maranhão, near town Duque Bacelar, vicinity lineament. A normal fault NNE-SSW direction was responsible for lowering Itapecuru Formation strata (Cretaceous) and relative upward movement Pedra de F...