(Table T1) Magnetic anisotropy of samples from ODP Hole 180-1117A

At Site 1117, drilled during Leg 180 of the Ocean Drilling Program in the Woodlark Basin, we cored a fault zone and recovered fault gouge, mylonitized and brecciated gabbros, and undeformed gabbro. We measured the anisotropy of magnetic susceptibility for the rock samples. The susceptibilities of the fault gouge samples were lower than those of the undeformed gabbro, and those of deformed gabbros were lowest. The anisotropy degrees of the fault gouge samples were higher than those of the deformed and undeformed gabbros. Oblate magnetic fabrics were dominant in the samples from the fault zone.本研究针对伍德拉克海盆（Woodlark Basin）内大洋钻探计划（Ocean Drilling Program）第180航次1117站位的钻探岩心展开分析：研究人员对一处断层带实施取心作业，回收得到断层泥、糜棱岩化角砾状辉长岩以及未变形辉长岩样品。随后对上述岩石样品开展磁化率各向异性（anisotropy of magnetic susceptibility）测试。测试结果显示：断层泥样品的磁化率低于未变形辉长岩，变形辉长岩的磁化率为最低；断层泥样品的磁化率各向异性程度高于变形辉长岩与未变形辉长岩；断层带样品的磁组构以扁椭球形为主。