A simple phenomenological model founded on Lorentzian functions is evaluated on the first derivative of magnetic hysteresis loops from several artificial samples with iron oxide/oxyhydroxide mixtures imitating natural sediments. The approach, which shows that hysteresis loops can be described by elementary analytical functions and provides estimates of magnetization parameters to a satisfactory degree of confidence, is applied with the help of standard data analysis software. Distorted hysteresis loops (wasp-waisted, goose-necked and pot-bellied shaped) from simulations and artificial samples from a previous work are reproduced by the model which allows to straightforwardly unmix the ferromagnetic signal from different minerals like magnetite, greigite, haematite and goethite. The analyses reveal that the contribution from the ferrimagnetic fraction, though present in a minor concentration (≤2.15 wt%), dominates the magnetization.

建立在洛伦兹函数基础上的简单现象学模型，是根据几个磁滞回线的一阶导数进行评估的，这些磁滞回线来自多个人工样本，其中氧化铁/羟基氧化物混合物模拟了天然沉积物。该方法显示了磁滞回线可以由基本分析功能描述，并提供了令人满意的置信度的磁化参数估计，并借助标准数据分析软件进行了应用。该模型再现了模拟中的变形磁滞回线（黄蜂腰状，鹅颈状和大肚子状）和以前工作的人工样本，该模型可以直接解混来自磁铁矿，方铁矿，赤铁矿和针铁矿等不同矿物的铁磁信号。