Science. 1993 Jul 16;261(5119):343-5. doi: 10.1126/science.261.5119.343.
Although magnetic data are the primary evidence for ocean floor spreading, the processes by which magnetic phases in ocean floor basalts are formed remain poorly constrained. Scanning transmission electron microscopic observations show that magnetic single-domain magnetite in sheeted dike basalts of Deep Sea Drilling Project hole 504B formed through oxidation-exsolution of ilmenite, exsolution of ulvöspinel lamellae, and recrystallization of end-member magnetite by interaction with convecting fluids. The data suggest that the sheeted dike basalts, with single-domain magnetite as an efficient and stable magnetic carrier, contribute significantly to sea-floor magnetism.
虽然磁场数据是海底扩张的主要证据，但海底玄武岩中磁性相的形成过程仍不清楚。扫描透射电子显微镜观察表明，深海钻探计划 504B 孔层状岩脉玄武岩中的单畴磁铁矿是通过钛铁矿氧化-出溶、超镁铁尖晶石薄片出溶以及与对流流体相互作用重结晶形成的。这些数据表明，具有单畴磁铁矿作为有效和稳定的磁性载体的层状岩脉玄武岩对海底磁性有重要贡献。
