Showing papers in "Geoexploration in 1969"

TL;DR: In this article, preliminary results of some model tank resistivity experiments with Wenner and surface laterolog arrangements are reported, which is the surface equivalent of a focused electrode system used by Doll (1951) for borehole investigations.

TL;DR: In this article, some Swedish surveys are presented to show the possibilities of using the shallow seismic refraction method in water prospecting and investigation of the bedrock condition below the ground surface.

TL;DR: In this paper, the electromagnetic response of a two-layer anisotropic earth, where the bottom layer meets the top layer at an acute angle, in the presence of the earth's natural electromagnetic field has been studied.

TL;DR: A review of the application of the piezoelectric effect to the prospecting of quartz and pegmatitic veins, as well as the results of test borings on gold bearing quartz beds is given in this paper.

TL;DR: In this paper, detailed gravity observations were made in a part of the ultrabasic belt of the Cuttack district, Orissa, India, to locate deposits of refractory grade chromite for the Tata Iron and Steel Company, Jamshedpur, India.

TL;DR: In this paper, a description of recent prospecting activities for Zn-Cu-Pb mineralizations in the Vargistrask area of northern Sweden is given, with particular attention attaching to the results of induced polarization measurements and experiments with new electro-magnetic methods such as VLF, and a so-called XYZ -slingram with a high operating frequency.

TL;DR: In this paper, a case study based on the statistical analysis of data of the Oriental lode, West Reef of Kolar goldfields (southern India) is presented, where the gold value properties here follow a two parameter lognormal distribution pattern.

TL;DR: The possibilities, advantages and limitations of geoelectrical methods for ground-water exploration, particularly in semi-arid areas, are discussed in this paper, where the need for a thorough geophysical ground water investigation is emphasized.

TL;DR: In this paper, the results of geophysical investigations carried out in the northernmost part of the Khetri Copper Belt, Rajasthan are presented, which is a part of a Precambrian terrain consisting of a group of parametamorphites belonging to the Delhi System.

TL;DR: In this article, a portable hammer seismograph was used to record shear wave energy and compressional wave data to determine Poisson's ratio and other elastic constants for overburden in-situ.

TL;DR: In this article, an approximative method of computing gravity anomalies due to two-dimensional homogeneous bodies is developed, where the attracting body is replaced by an infinite horizontal right-angled prism, whose attraction can be easily calculated with the aid of a simple line-integral method.

TL;DR: In this article, equipment designed for different a.c. demagnetization methods and enlarged for routine work with samples of usual size is described in detail, in which a large coil is installed perpendicularly to a smaller one, in the process of which it can be exposed to field intensities of up to 1,200 Oe.

TL;DR: The D2FORM program package as mentioned in this paper is a collection of mathematical routines used in the practical study of 2-dimensional ore-bodies or geological formations, which are linked together by a supervising program.

TL;DR: A graphico-numerical method is designed for the complete determination of the magnetic field due to a thin uniform rectangular plate as discussed by the authors, a model often employed for approximating geologic features such as volcanic flows, sills and small reliefs of basement.