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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Resistivity and induced-polarization modeling for a buried resistive dike and buried resistive cylinder

Ethington, Edgar Francis January 1985 (has links)
No description available.
32

Electromagnetic coupling of grounded wires on an anisotropic, polarizable, layered earth

O'Connor, Louis J. January 1990 (has links)
No description available.
33

The design of exploration programs for economic mineral deposits

Mickle, D. Grant January 1964 (has links)
No description available.
34

Resistivity and self potential logging studies in sulfide zones.

Bower, Edmund Jeremy. January 1968 (has links)
No description available.
35

A new method for gravity terrain corrections.

Chang, Woong Bong. January 1970 (has links)
No description available.
36

Phase-angle measurements in the induced polarization method of geophysical prospecting.

Scott, William James. January 1971 (has links)
No description available.
37

The application of seismic surveys to the evaluation of shallow coal deposits

Brabham, Peter John January 1986 (has links)
The viability of using surface seismic techniques in the exploration of shallow coal deposits in the UK is investigated. The geological factors that affect the economic viability of a prospective site are the overburden ratio and the presence of faulting, drift channels and previous mine workings. The seismic refraction technique using both congressional (P) waves and shear (S) waves is used and also the P wave reflection technique. The P wave source used is explosive and the shear wave source is a horizontal hammer. Seven site surveys are described, six in North East England, and one in the North West. The refraction technique using the Plus-Minus and Generalized Reciprocal Methods of interpretation is used to locate faults, estimate drift cover thicknesses and pinpoint areas of previous opencast excavation. Faults are located by a change in refractor velocity, or by a sudden change in refractor depth. Shear waves display a greater ability to image sharp depth anomalies than P waves, due to the greater velocity contrast between consolidated and unconsolidated rocks that S waves exhibit. S waves are better lithological indicators than P waves as there exist distinct ranges of S wave velocities for unconsolidated (150 to 400m/sec) and consolidated (650 to 1400m/sec) rocks. The fundamental problem with shallow reflection surveys on land is that the shallow reflections occur at the same time as surface waves and ground roll. The reflection technique is used to locate faults and detect the boundaries of old mine workings. No reflections shallower than 70m are recorded, and in areas of thick glacial drift cover no frequencies higher than l00Hz are detected. The results of the survey to locate positions of old mine workings are inconclusive, although some features seen on the final sections could be related to boundaries between unworked and worked strata.
38

Telluric and magnetotelluric surveys at 8Hz.

Slankis, John Aris. January 1970 (has links)
No description available.
39

Phase detection instrumentation for magnetotelluric prospecting

Nichols, Edward Andrew. January 1982 (has links)
No description available.
40

A study of the lithology and structure of the eastern Arunta Inlier based on aeromagnetic interpretation : a lithological subdivision and structural history of the eastern Arunta Inlier, with particular emphasis on the relationship between magnetic mineral petrogenesis, rock magnetism and aeromagnetic signature /

Whiting, Thomas H. January 1987 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Geology and Geophysics, 1987. / Offprint in pocket. Includes bibliographical references (leaves 82-90).

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