Thermomagnetic analysis of samples from two sections of lava layers of the Late Cenozoic basalt lava river in the Malyi Yenisei valley is carried out. The main magnetization carrier in the studied basalts is titanomagnetite with the Curie points of 100–120°C which is frequently substantially oxidized both single-phase and heterophase up to magnetite. It is likely that some part of metallic iron in the studied samples has also been oxidized and even disintegrated, which resulted in the significant scatter of iron concentration across the flow against which, however, the increasing trend of iron concentration in the lava flow from the top downwards is observed. The relative magnitude of this increase (iron concentration gradient along the vertical of the lava flow) is almost constant for all flows of the lava sequence probably indicating the decisive role of gravity in iron particle precipitation in the lava. Based on the synthesis of iron particle data from different objects and different regions of the world, this correlation with gravity also follows from the very similar shapes of particle size histograms of iron. This is most clearly seen from the same particle size modes (10–20 μm). Another important finding is that this constant mode of iron particle size does not depend on age and origin of rock as well as on the type of particle source (terrestrial or extraterrestrial).

中文翻译：

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马利叶尼塞熔岩河玄武岩中的金属铁：热磁研究结果

对马利叶尼塞河谷晚新生代玄武岩熔岩河两段熔岩层样品进行了热磁分析。所研究玄武岩中的主要磁化载体是居里点为 100-120°C 的钛磁铁矿，它经常被单相和异相氧化成磁铁矿。研究样品中的部分金属铁很可能也被氧化甚至分解，导致铁浓度在整个流动中显着分散，然而，来自熔岩流中铁浓度的增加趋势相反。观察到自上而下。对于熔岩序列的所有流动，这种增加的相对幅度（沿熔岩流垂直方向的铁浓度梯度）几乎是恒定的，这可能表明重力对熔岩中铁颗粒沉淀的决定性作用。基于来自世界不同物体和不同地区的铁粒子数据的综合，这种与重力的相关性也来自于铁粒子大小直方图的非常相似的形状。从相同的粒径模式 (10–20 μm) 可以最清楚地看到这一点。另一个重要发现是，这种铁粒子大小的恒定模式不取决于岩石的年龄和起源以及粒子源的类型（地球或外星）。基于来自世界不同物体和不同地区的铁粒子数据的综合，这种与重力的相关性也来自于铁粒子大小直方图的非常相似的形状。从相同的粒径模式 (10–20 μm) 可以最清楚地看到这一点。另一个重要发现是，这种铁粒子大小的恒定模式不取决于岩石的年龄和起源以及粒子源的类型（地球或外星）。基于来自世界不同物体和不同地区的铁粒子数据的综合，这种与重力的相关性也来自于铁粒子大小直方图的非常相似的形状。从相同的粒径模式 (10–20 μm) 可以最清楚地看到这一点。另一个重要发现是，这种铁粒子大小的恒定模式不取决于岩石的年龄和起源以及粒子源的类型（地球或外星）。