Method of dating different levels in a terrestrial geological bed using remanent and induced magnetization measurements
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United States of America Patent
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Apr 18, 1995
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N/A
app pub date -
Jul 28, 1993
filing date -
Jul 30, 1992
priority date (Note) -
Expired
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Abstract
The method of the invention consists in measuring remanent magnetization along a borehole drilled through a geological bed, in detecting the set of reversals in the remanent magnetization, in measuring the induced magnetization at the various levels in said bed, in detecting maxima in the induced magnetization, and in correlating these measurements with known dates, firstly of reversals in the earth's magnetic field and secondly of terrestrial phenomena that have given rise to concentrations of highly magnetic substances, thus making it possible to give dates to the various levels of the bed. The method is particularly applicable to oil prospecting.
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