Science. 1994 Sep 9;265(5178):1561-3. doi: 10.1126/science.265.5178.1561.
Unblocking temperatures of natural remanent magnetization were found to extend well above the dominant Curie points in samples of oceanic basalts from the axis of the East Pacific Rise. This phenomenon is attributed to the natural presence in the basalts of three related magnetic phases: an abundant fine-grained and preferentially oxidized titanomagnetite that carries most of the natural remanent magnetism, a few coarser and less oxidized grains of titanomagnetite that account for most of the high-field magnetic properties, and a small contribution to both the natural remanent magnetism and high-field magnetic properties from magnetite that may be due to the disproportionation of the oxidized titanomagnetite under sea-floor conditions. This model is consistent with evidence from the Central Anomaly magnetic high that the original magnetization acquired by oceanic basalts upon cooling is rapidly altered and accounts for the lack of sensitivity of bulk rock magnetic parameters to the degree of alteration of the remanence carrier in oceanic basalts.
在东太平洋海隆轴部的大洋玄武岩样本中，人们发现天然剩余磁化强度的去磁温度远远高于主导居里点。这种现象归因于玄武岩中存在三种相关的磁性相：丰富的细粒且优先氧化的钛磁铁矿，携带大部分天然剩余磁性；少量较粗且氧化程度较低的钛磁铁矿颗粒，占高磁场磁性的大部分；以及来自磁铁矿的对天然剩余磁性和高磁场磁性的少量贡献，这可能是由于海底条件下氧化钛磁铁矿的歧化作用。该模型与中央异常磁场高的证据一致，即大洋玄武岩在冷却时获得的原始磁化强度迅速改变，并解释了块状岩石磁性参数对大洋玄武岩中剩余磁性载体的改变程度的不敏感性。
