Replication Data for: Separating geometry- from stress-induced remanent magnetization in magnetite with ilmenite lamellae from the Stardalur basalts, Iceland

Bulk rock magnetic measurements (hysteresis loops, backfield curves and FORC diagrams) were done on basalts from the Stardalur volcano. Realistic geometries of magnetite grains from those basalts were obtained by FIB-SEM nanotomography. Meshes of these geometries were used to create micromagnetic models. The magnetic properties of these grains were modeled using the three dimensional micromagnetic code MERRILL and the influence of grain shape and size were isolated by modeling hysteresis loops. Comparing the modeled hysteresis loops with measured bulk hysteresis loops allows for quantification of internal stress in these grains. This dataset includes the meshes used to do the micromagnetic modeling, the resulting hysteresis loop data, and the raw data files for the rock magnetic measurements.本数据集针对斯塔尔达卢火山产出的玄武岩开展了全岩磁学测量，测试内容包括磁滞回线、反向场曲线以及一阶反转曲线（First-Order Reversal Curves, FORC）图。通过聚焦离子束-扫描电镜纳米层析成像（FIB-SEM nanotomography），获取了该类玄武岩中磁铁矿颗粒的真实几何形貌。基于这些几何形貌生成的网格文件被用于构建微磁模型，随后借助三维微磁模拟程序MERRILL对这些颗粒的磁学特性进行模拟，并通过模拟磁滞回线分离了颗粒形状与尺寸的影响。将模拟得到的磁滞回线与实测全岩磁滞回线进行对比，可实现对这些颗粒内部应力的定量表征。本数据集包含用于微磁模拟的网格文件、生成的磁滞回线数据，以及全岩磁学测量的原始数据文件。