G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/26 (2006.01)
Patent
CA 2128754
DESCRIPTIVE ABSTRACT Probe and process for measuring the remanent field ( R) of a geological formation. A measurement is made of the magnetic field (B+I1+R1) along the axis of the geomagnetic field using a scalar magnetom- eter, followed by a vector measurement of the resultant mag- netic field (Bp+Ip+R3) projected onto an invariable measure- ment axis. With the aid of the calculated values of the geo- magnetic field (B) and the magnetic susceptibility field (I), it is in particular possible to calculate a component (S) of the remanent magnetic field (R) perpendicular to the geomag- netic field (B) and determine if the cancellation of the com- ponent of the field (R1) along this axis is due to a tilting of the magnetic pole in history or a local reduction of the remanent magnetization. Application to the dating of geological formations in bore- holes or drill-holes. (Fig. 1)
Barthes Veronique
Pocachard Jacques
Commissariat A. L'energie Atomique - C.e.a.
Goudreau Gage Dubuc
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