Continental magnetic anomalies

Abstract

The mapping and interpretation of magnetic anomalies provide a useful and efficient method of studying crystalline basement rocks, igneous intrusions, and extrusive rocks of the continental crust. Accordingly, government, academic, and industrial efforts have been expended during the past four years in acquiring and interpreting new data, re‐interpreting old data, and developing new techniques for the analysis of magnetic anomaly data. Magnetic anomaly interpretation continues to be a major element in mineral exploration geophysics and a small but significant part of petroleum exploration. During the past several years these techniques have assumed increasing significance in basic geologic studies, geothermal investigations, and engineering studies related to seismic regionalization and site stability problems.

Analytical representation of spatial and temporal variations of the geomagnetic field in the Indian region

“…The application of geomagnetic field measurements in delineating crustal magnetic anomalies, which are of longer wavelengths than those investigated by exploration geophysicists, is being increasingly recognised (for example see Hinze 1979;Blakely and Cande 1979). This has resulted from significant developments in the modes of data acquisition as well as due to the development of new analytical interpretation techniques.…”