IODP Expedition 391 Magnetic remanence (spinner)

Magnetic remanence was measured on discrete samples by an Agico JR-6A spinner magnetometer, first as natural remanent magnetization (NRM) and then after demagnetization or remagnetization steps were performed on the samples (e.g., alternating field [AF] demagnetization, thermal demagnetization [TD], or isothermal remanent magnetization [IRM]).采用Agico JR-6A型旋转磁力仪对离散样品开展磁剩磁测量：首先测定其天然剩磁（natural remanent magnetization, NRM），随后对样品完成退磁或复磁处理步骤后再次测量，具体处理方式包括交变场（alternating field, AF）退磁、热退磁（thermal demagnetization, TD）及等温剩磁（isothermal remanent magnetization, IRM）等。