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磁化率各向异性(AMS)在地质领域中的应用极为广泛,可以用来研究古流向造成的磁性矿物的定向排列,以及构造应力作用引起的岩石内磁性矿物的定向重结晶、定向排列及韧性变形。本文介绍了AMS的基本原理和参数,并并介绍了前人及作者应用AMS详细分析研究了二个实例:(1)以假多畴(MD)高钛磁铁矿为主要载磁矿物的玄武岩样品的AMS变化及其对构造运动的响应;(2)以MD磁铁矿为主要载磁矿物的湖泊沉积物样品在沉积过程中AMS变化。AMS可以灵敏地检测样品中磁性矿物的定向排列,因此在在地质领域中具有很好的应用前景。
Magnetic susceptibility anisotropy (AMS) is widely used in the field of geology and can be used to study the directional alignment of magnetic minerals caused by paleo-current flow and the directional recrystallization, orientation and toughness of magnetic minerals in the rock caused by tectonic stress Deformation. This paper introduces the basic principles and parameters of AMS, and introduces the predecessors and authors using AMS detailed analysis of two examples: (1) to the multi-domain (MD) high-titanium magnetite as the main magnetite-bearing basalt AMS variation of samples and their response to tectonic movement; (2) AMS changes during deposition of lacustrine sediments with MD magnetite as main magnetite. AMS can sensitively detect the orientation of magnetic minerals in the sample, so it has a good application prospect in the field of geology.