地磁场（AR）中剪切断层型断裂（破裂）的表达：以 Lisagor 矿田为例

Gagik Markosyan, Lyuba Mirzoyan
埃里温国立大学地理和地质系

摘要

本文讨论了磁力测量（磁力勘探）绘制剪切断层断裂图的可能性及其在磁场中分离的规律。断裂发生的地质
构造先决条件及其意义被表示为矿山控制结构。特别是剪切断层断裂，除了环境磁畴结构的机械变化外，还会导致
磁畴磁矩的定向和磁矩的减小。因此，断裂带的地磁异常场强度在一定程度上降低，这在磁力测量过程中有时无法
记录，特别是当扰动发生在磁性较弱的复杂沉积岩区域时。该问题的解决方案，尤其是在褶皱区域，可以通过存在
具有陡坡的磁性活动层（基性岩脉、磁铁矿砂岩等），该层经历了剪切断层破裂。本文介绍了在 AR 的 Lisagore 矿
区通过地磁研究发现的剪切断层型断裂。这些断裂表现在带有砂岩夹层的泥质岩磁活动层的几个滑动幕中，地质图
中也对此进行了描述。泥板岩本身不具有磁性财产，因此其磁性活动可以用磁铁矿 - 砂岩薄夹层的存在来解释，这
些夹层由一系列 T 场的高强度线性异常所描述，这些异常被断裂位置处滑动幅度的大小所中断并相互偏离。

关键词

构造断裂；剪切断层；磁强计；磁异常

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