Figure 22. Downhole variation of intensity (A) and inclination (B) of NRM and stable magnetization after AF demagnetization at 15 mT for Cores 149-897D-4R (upper part) and -5R (lower part). NRM inclinations are strongly biased toward high positive inclinations, suggesting that drilling-induced magnetization is present. AF demagnetization to 15 mT generally can remove this drilling-induced magnetization, as indicated by changes in inclination and intensity.

Figure 22. Downhole variation of intensity (A) and inclination (B) of NRM and stable magnetization after AF demagnetization at 15 mT for Cores 149-897D-4R (upper part) and -5R (lower part). NRM inclinations are strongly biased toward high positive inclinations, suggesting that drilling-induced magnetization is present. AF demagnetization to 15 mT generally can remove this drilling-induced magnetization, as indicated by changes in inclination and intensity.