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The Utility of Regional Gravity and Magnetic Anomaly Maps

William J. Hinze

出版	Society of Exploration Geophysicists, 1985
主題	Science / Earth Sciences / GeologyScience / Physics / Gravity
ISBN	09318303469780931830341
URL	http://books.google.com.hk/books?id=_2cZAQAAIAAJ&hl=&source=gbs_api

註釋

Mapping of the Earth's gravity and magnetic fields has a long and distinguished history as part of the investigations of the structure and petrologic variation within the Earth' s lithosphere. Prior to 1950, observations of anomalies in these planetary fields had generally been focused on limited areas for specific mineral-resource and geological objectives. The increasing availability of portable gravimeters and the development of aeromagnetic-survey technology shortly after World War II, however, led to efficient and precise gravity and magnetic mapping of extensive regions. These "regional" surveys were conducted for the most part by governmental organizations most often as a means of evaluating or stimulating the exploitation of earth resources. The data from these federal surveys are generally available in the public domain and have been augmented by large amounts of data collected by academic institutions for basic-research investigations. Vast amounts of gravity- and magnetic-anomaly data also have been acquired by industrial firms in mineral-resource exploration, but with few exceptions these data are generally not available to the public. In the United States, the publicly available data have recently been composited into new or improved country-wide anomaly maps.