Applications of gravity and magnetic surveys: The state‐of‐the‐art in 1985

Abstract

There is a continuous large demand for gravity and magnetic surveys all over the world for a variety of exploration applications, all of which require the geophysicist to provide some new insight into the geology of an area at scales ranging from very large to very small. To achieve this objective, (a) surveys must be carried out accurately, and (b) their results must be interpreted in sympathy with what is already known of the geology. The methodology for acquiring and compiling data appears to be keeping pace with modern technology. Methods of quantitatively interpreting anomalies in terms of models of causative bodies are adapting rapidly to the burgeoning availability of computing power, from large, powerful machines to inexpensive and field‐portable microcomputers. Geologic interpretation, or the identification of physical property distributions in terms of realistic geologic models and processes, is still relatively neglected—in practice and, regretably, in the geophysical literature. Research into the relationships between physical rock properties—particularly magnetite distribution—and geology is gaining momentum, but research still lags behind the requirements of the conscientious geophysical interpreter.

GIS based 3D visualization of subsurface and surface lineaments / faults and their geological significance, northern tamil nadu, India

“…As many Geoscientists have used gravity and magnetic data for the delineation of basement structures (Paterson and Reeves, 1985;Kumar et al, 2009, Naganjaneyulu andSantosh, 2010). In the present study, the gravity data collected from the http://topex.ucsd.edu/cgi-bin/get_data.cgi was fed into 3D analyst module of ArcGIS and DEM (Digital Elevation Model) on gravity was prepared.…”

A Demonstration of the Application of Quantized Spatial Transforms in the Scaled and Optimized Separation of Scalar Potential Source Contributions for Use in Education, Research and Resource Exploration

“…(Paterson & Reeves, 1985) Figure 1a indicates the locations used for an irregular survey of a 1 degree region in upstate New York centered on the Balmat zinc mine. These were acquired with an effective average spacing of 1%, or .01 degrees (~ 1 km).…”

Natural Resources Assessment

“…A typical metallic resource exploration program would use existing gravity, magnetic, seismic, and electrical resistivity data to extend the known geology and evaluate the thickness of the cover material (alluvium or rocks overlying the targets of interest) overlying deeper or basement rocks (Le., Paterson and Reeves 1985, pp. 2559, 2563, 2567, and 2593Blakely and Jachens 1991, pp.…”