PDF Coal Exploration and Mining Geology
A variety of geological techniques is used in coal exploration is including field mapping, interpretation of air photos and satellite images, and airborne and ground geophysical surveys such as gravity, magnetic and seismic studies.
GEOPHYSICAL APPLICATIONS.docx - GEOPHYSICAL APPLICATIONS FOR
Seismic methods are commonly used in exploration for oil and coal but are not common in exploration for metalliferous deposits in geologically complex mineralised areas. For more than 70 years, reflection seismic methods have been used with great success to explore sedimentary basins for hydrocarbons.
Exploration geophysics - SEG Wiki
Sep 12, 2019 · Exploration geophysics is the applied branch of geophysics which uses surface methods to measure the physical properties of the subsurface Earth, along with the anomalies in these properties, in order to detect or infer the presence and position of ore minerals, hydrocarbons, geothermal reservoirs, groundwater reservoirs, and other geological structures.
PDF Coal Exploration and Mining - EOLSS
Geophysical methods now play a critical role in many coalfield investigations.The techniques used at an early stage in the exploration program are normally those that give broad-scale information on a large area at relatively little cost.
WHAT ARE THE ADVANTAGES & LIMITATIONS OF GEOPHYSICAL TEST
2016/02/24 · Data from geophysical testing should always be correlated with information from direct methods of exploration. There are a number of different geophysical in-situ tests that can be used for stratigraphic information and in the determination of engineering properties. The two most common methods are: Seismic Methods; Electrical Methods
Mineral Exploration Geophysics - Collier Geophysics, LLC
Geophysical and remote sensing technologies have become essential to the discovery and assessment of gold and silver, base metal, coal and uranium, and strategic mineral deposits. Airborne geophysical methods are employed to map large areas and increase the efficiency and success of the exploration program. Ground and borehole geophysical methods are deployed to map the subsurface geology…
Types and models of coal-deposit exploration in China
At present, coal exploration in China is undergoing the transformation from direct coal-hunting and drilling as the main means to combining techniques from geology, geophysical exploration, and remote sensing. It has entered the stage of comprehensive exploration, identifying deep, difficult, and new types of coal sources.
Geophysical Exploration Methods - NXT Energy Solutions
Other geophysical methods employed in hydrocarbon exploration include: 2D and 3D seismic data – reflection seismology is similar to sonar or echolocation, and requires a controlled source to emit a signal into the earth and an array of receivers to capture the signal …
Geophysical methods in petroleum‐exploration - Brian Eby
Since the discovery of enormous new quantities of oil, gas, and sulphur has been by far and wide the principal benefaction of geophysics in the United States, this paper will refer only to geophysical methods employed in the search for these particular minerals.
Coal mining - Prospecting and exploration | Britannica
Geophysical exploration. In geophysical exploration, the seismic, electric, magnetic, radiometric, and gravitational properties of earth materials are measured in order to detect anomalies that may be caused by the presence of mineral deposits. Their form of exploration may begin with airborne methods in regional and target-area investigations and continue with on-ground methods during detailed …
Coal Exploration - an overview | ScienceDirect Topics
Geophysical methods have been used for many years in the search for metallic ore bodies and petroleum fields, and are also useful at different scales in many coal exploration programs. If the coal basin is underlain by rocks that are denser than or have different magnetic properties from those associated with the coal seams, maps showing the pattern of variation across the area in the earth's gravitational …
The application of geophysics in South African coal mining
Geophysics applicability matrix for pertinent coal mining and exploration problems Exploitable property Typical required Typical required Most applicable Workable survey contrast range resolution geophysical methods geometry Delineation of old workings Air-filled: density, 0–50 m Accuracy < 5 m TDEM Grid surveys on surface
Surface and Subsurface Methods of Mineral Exploration
This discussion is therefore restricted to geological, geochemical and drilling methods. Geological Methods: Geological maps provide exploration agencies or companies with regional geological and geophysical information so that target areas that are consided to have a better prospect in terms of mineral deposits may be identified.
PDF) GEOPHYSICAL TECHNIQUES AND THEIR APPLICATIONS
Magnetic technique is the most commonly used geophysical tool in gold exploration, as it is in exploration for other metals (Doyle, 1990). Successful use of magnetic technique for gold exploration in South Africa and Canada was reported by (Hugh, 1990). …
Converted-wave seismology for coal exploration | CSEG RECORDER
Seismic reflection is a valuable geophysical tool for accurate and cost-effective imaging of coal seams and is of significant importance to the economics of coal mining in Australia. However, the desire to locate and characterise increasingly subtle structures and lithological features continues to drive research into alternative seismic ...
Examination of the gravity & electromagnetic survey
As part of the first year's project an investigation into the applicability of gravity and transient electromagnetic geophysical methods for coal exploration was undertaken. The Caroona coal prospect has a resource of high quality multi-seam coal lying within relatively complex geology.
Downhole Geophysical Logging Applications for Mining
Mar 29, 2018 · : mining – coal and ore delineation - reserves, mining engineering parameters, groundwater hydrology, fractured rock aquifer flow assessment, geotechnical applications for tunneling, rock mechanics applications, etc. > Downhole geophysical methods are faster, more accurate, more versatile, and significantly less expensive than more
Types of Oil and Gas Exploration Methods | Profolus
Jan 21, 2018 · Note that these methods are specifically used to determine the presence of an oil or gas under a particular land area or a specified area within the seabed. Three main types of oil and gas exploration methods 1. Surface methods. Oil and gas exploration using surface methods are based on either one of the two principles.
Geophysical Methods, Exploration Geophysics » Geology Science
The physical properties of rocks have been used to devise geophysical methods that are essential in the search for minerals, oil and gas and other geological and environmental problems. These methods are: Gravity method. Seismic method. Electromagnetic method.
PDF Assessment of A Geophysical Coal Exploration Method in A
Coal exploration projects are focused to accurately predict the geology of a coal field in a cost-effective manner. More geologic data gene rally yields a better geological model of the coal field. Advances in geophysical methods may provide tools to supplement traditional methods of coal exploration.