geophysics method Articles
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Passive Seismic Identifies a Meteorite Crater in Western Australia - Case Study
Western Australia An intriguing presentation given by dr. Jayson Meyers (Resource Potential, Perth, Australia) that illustrates how passive seismic and other geophysical methods identify a young meteorite crater in Archaean greenstone of the Coolgardie Goldfield (Western Australia). ...
By MoHo s.r.l.
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Cole-Cole Inversion of Telluric Cancelled IP Data
SUMMARY: Induced Polarisation, like all geophysical methods, suffers from the presence of noise. Of the many sources of noise, tellurics can often be one of the most problematic to remove. An effective method of removing telluric noise has been trialed on dipole-dipole data acquired by MIM Exploration’s proprietary MIMDAS system, during routine surveying in NE South Australia. The ...
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Groundwater resource exploration
Resistivity method is very suitable for groundwater exploration. Two methods can be used, the surface method and crosshole method. Surface method is cost effective, though it is sometime not as accurate as the crosshole method. Geologists usually narrow down the exploration area and then operators can use geophysical methods to find groundwater. Surface method involves laying two cables on ...
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GMR: Superior Technology for Surface Magnetic Resonance Measurements of Hydrogeologic Properties
Introduction Surface magnetic resonance is a powerful geophysical method that provides direct, non-invasive detection and imaging of groundwater. However, the ability to obtain reliable and accurate results requires sophisticated instrumentation and software. Choosing the wrong instrument can result in unreliable data, lost investment, and potentially physical injury to the users or bystanders. ...
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Electromagnetic detection of a 410-km-deep melt layer in the southwestern United States.
A deep-seated melt or fluid layer on top of the 410-km-deep seismic discontinuity in Earth’s upper mantle, as proposed in the transition-zone ‘waterfilter’ hypothesis, may have significant bearing on mantle dynamics and chemical differentiation. The geophysical detection of such a layer has, however, proved difficult. Magnetotelluric and geomagnetic depth sounding are geophysical methods ...
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Integrated Geophysics: Combining methods to obtain a better perspective
The combined information from different geophysical surveying methods often allows ECA's geophysicists to provide interpretations with much greater confidence. Magnetics with Electromagnetic Induction (EMI) GPR with Magnetics and/or EMI GPR with Metal Detection (EMI or EM-61) Seismic with EMI ...
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Application of high-resolution geophysical methods in submarine pipeline inspection
High-resolution marine geophysical equipment employed includes single beam echo sounder (SBES), multi-beam echo sounder (MBES), sub-bottom profiler (SBP) and side scan sonar (SSS). By employing SBES, the reflection curve in shallow water reveals the real condition of pipeline; while in deep water, the reflection or diffraction curve can't reveal the real condition. Compared with SBES, MBES is ...
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Ground Penetrating Radar for mining
Ground-penetrating radar (GPR) is a well-established technology that has earned its place as the go-to technology for many subsurface imaging applications. No other geophysical method comes close to GPR's ease of deployment, nor the amount of ground that an operator can cover in a typical day. Workers can quickly and efficiently collect quality high-resolution data, which often facilitates ...
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Geophysical applications to solid waste analysis
Abstract: Case studies of regional landfills show that electromagnetic geophysical methods can accurately and inexpensively define boundaries and thickness of waste. Degradation of putrescible solid waste generates conductive leachate that can be imaged with a frequency-domain terrain conductivity meter. Terrain conductivity measurements can be modified through a simple algorithm based upon ...
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Assessment of geo-hazard potential and site investigations using Resistivity Imaging
The use of geophysical methods for evaluating subsurface contamination of sites is becoming increasingly popular all over the world. The paper presents the assessment of geo-hazard potential of a site in the City of Duncanville, Texas using Resistivity Imaging (RI). Resistivity Imaging was being used to identify areas of environmental concern and to develop a detailed image of subsurface ...
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The Mycenaean drainage works of north Kopais, Greece: a new project incorporating surface surveys, geophysical research and excavation
The attempt to drain the Kopais Lake was one of the most impressive and ambitious technical works of prehistoric times in Greece, inspiring myths and traditions referring to its construction and operation. The impressive remnants of the Mycenaean hydraulic works represent the most important land reclamation effort during prehistoric Greek antiquity, thus attracting the attention of the ...
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What is GPR?
Ground penetrating radar, or GPR, is the most modern and rapidly developing geophysical method. The possibilities of its application are being investigated, the number of tasks that it is capable of solving is increasing, and the equipment is being improved and modified. Today, GPR is used to investigate depths from the first centimeters (e.g. when monitoring the laying of runway surfaces) to ...
By Geotech
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Taking the Uncertainty Out of 3D GPR Array Integration in SUE
The fundamental core of the SUE profession is a complete understanding of the principle of uncertainty. The SUE professional whether a licensed Professional Engineer or Professional Licensed Surveyor, or other qualifying professional must understand this principle. These professionals operate under the relevant statutes in their respective state and sign off on the SUE deliverable having ...
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A novel approach for providing potable water in rural Sodwana Bay, northern Kwazulu-Natal, South Africa
Many people living in the Sodwana area of South Africa do not have access to potable water. Groundwater is the best source of fresh water for the rural community. Potable water in the Zululand coastal plain, Sodwana, South Africa can be enhanced by: (i) providing detailed information on the aquifer system using geophysics; (ii) providing information on groundwater quality and its efficient ...
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Unique applications of MMR to track preferential groundwater flow paths in dams, mines, environmental sites, and leach fields
Groundwater systems have been notoriously di!cult to map with high degrees of accuracy. As a result, not only have traditional geophysical methods proven inaccurate for groundwater characterization work, but they are often costly in terms of time, money, and environmental trauma. "is paper describes a unique application of magnetometric resistivity or MMR (Edwards and Nabighian, 1991) for ...
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Determining the design of Buried foundations case study
Foundation Mapping Determining the three-dimensional design of foundations for telecommunications towers, buildings and road signs can be impractical and sometimes nearly impossible using conventional means. Properly applied geophysical test methods, hand probing and shallow test pits provide a very cost-effective and non-destructive approach to determining the design of foundations. GeoView has ...
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Fractured Bedrock Remediation - Case Study
ABSTRACT BOS 200® successfully remediates petroleum groundwater impacts in fractured bedrock at a former truck stop. Based on the post-injection groundwater results from the pilot test and full-scale injection, a No Further Action letter was issued in February 2015. CHALLENGES Over a period of 20 years, site investigation activities revealed a 320 foot (ft) long dissolved hydrocarbon plume ...
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Seismic study at the Pacific and Atlantic locks of the panama canal case study
Panama Canal Zone Grupo Unidos Por el Canal (GUPC) was tasked with characterizing subsurface conditions within the Third Set of Locks Project for the Panama Canal. In support of their characterization efforts, GUPC requested that seismic geophysical data be acquired at four locations within the project area. These locations include portions of the: Miraflores Cofferdam Atlantic Approach ...
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A combined mathematical geophysical model for prediction of pyrite oxidation and pollutant leaching associated with a coal washing waste dump
The waste produced by coal washing process produces many environmental problems. In this study, the pollution problems associated with the waste produced by Alborz Sharghi Coal Washing Plant was investigated by mathematical modeling. The study area is located at 11 km. to Razmjah coal region and 45 km. to Tehran-Mashhad road in the north part od Iran. To achieve the goal, a few samples were taken ...
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Searching for Archeological Anomalies in the Oluz Mound - Case Study
The History Of The Oluz Mound The Oluz Mound near Amasya, Turkey, is a very important ancient Turkish settlement with a history stretching back to 4,500 B.C. For archaeologists, this site in Central Turkey is an exciting opportunity to discover not just the area’s history, but the history of the birthplace of civilizations. Objective In 2014, our client was hired to help with ...
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