The results of stepwise AF demagnetization is offered in Table S1

The results of stepwise AF demagnetization is offered in Table S1

The NRM intensities regarding the products varied between 3.86 A— 10 a?’6 A/m and 5.72 A— 10 a?’3 A/m. For resource, the intensities in the vacant sample holders ranged from 1.0 A— 10 a?’8 A/m to 1.0 A— 10 a?’7 A/m. The NRM was actually practically entirely demagnetized in a maximum area of 60 mT and generally exhibited two steady remanence directions (Fig. normally, a soft element had been eliminated below 20 mT demagnetization and most most likely represents a magnetic overprint caused during sample or a viscous remanent magnetization (Fig. S3(ma€“n)). Typically, a difficult and stable component has also been present that decayed linearly to the beginnings on the vector plots and was actually entirely eliminated in an optimum AF demagnetization industry of 60a€“80 mT. We understand this steady remanence given that attribute remanent magnetization (ChRM).

Debate

The sample internet in Pacific sea and southern area China Sea happened to be found at lowest to center latitudes within the north Hemisphere; consequently, positive, downward-directed inclination values of products should show typical polarity. The topmost slice samples from Fe-Mn crust generally yielded coherently positive inclinations, indicating the reports of Brunhes normal polarity chron. On the other hand, the Southwest Indian Ridge sampling site was a student in the south Hemisphere; for that reason, negative, upward-directed tendency principles indicate regular polarity. Plus, considering that the substrate stone ended up being perhaps not sleeping horizontally, it is necessary to combine the inclinations because of the nearly 180 amount change in general declination principles to calculate the magnetized polarity.

For the 31 piece examples of Fe-Mn crust PO-01 from Northwest Pacific, a secondary magnetization part was actually eliminated at 10 mT, and ChRM had been separated between 12.5 mT and 60 mT. Read More