Relative intensity and age depostion range in the north of the South China Se...

Relative intensity (RPI) was constructed using the equation:RPI=NRM((20-60)mT)/SIRM (20-60)mTwhere SIRM were imparted with DC fields of 1000 mT, then demagnetized using 20,...相对强度（Relative Intensity, RPI）通过下述公式构建得到：$ ext{RPI} = frac{ ext{NRM}_{(20-60) ext{mT}}}{ ext{SIRM}_{(20-60) ext{mT}}}$，其中20~60毫特斯拉（millitesla, mT）区间内的天然剩余磁化强度（Natural Remanent Magnetization, NRM）与饱和等温剩余磁化强度（Saturation Isothermal Remanent Magnetization, SIRM）分别为对应磁场条件下的两类剩余磁化强度；SIRM通过施加1000毫特斯拉的直流磁场（direct current field）获得，随后采用20……（原文未完整给出）完成退磁处理。