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G01V 5/04 (2006.01) G01V 5/12 (2006.01) G01V 5/14 (2006.01)
Patent
CA 1223675
-ABSTRACT- The invention concerns a probe for insertion into drill holes for the purpose of locating mineral ore deposits. A radioactive source of irradiation and a detector for determining the fluorescent irradiation stimulated by the radioactive irradiation in the area of the drill hole, which detector is positioned opposite the source of irradiation, and is protected by a screen, are concentrically arranged within a cylindrical housing. The detector has a reception surface standing vertically to the axis of the probe; this detector is turned to the source of irradiation. Through this arrangement of the reception surface, it can further advance to the part of the wall of the drill hole, which part, essentially ring- shaped, surrounds the source of irradiation, so that more fluorescent irradiation is collected from this ring-shaped area. It is thereby avoided that irradiation from areas of the drill hole wall lying in an axial direction on the further side of the reception surface is likewise collected, and that, in this way, the decomposition in the drill hole alignment, and the findings about the mineral deposits, are injured. The probe can be used in drill holes of small diameter.
451658
Janssen Klaus
Johnen Klaus
Winnacker Helmut
Johnson Douglas S. Q.c.
Preussag Aktiengesellschaft Metall
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