磁化率各向异性的原理及应用实例

张淑伟; 杨振宇; 王喜生; MariaTCioppa; 乔彦松; 霍俊杰; EdgardoCañón-Tapia; 赵越

磁化率各向异性的原理及应用实例

1.
中国地质科学院地质力学研究所, 北京 100081
2.
太原理工大学矿业工程学院, 太原 030024
3.
首都师范大学, 北京 100048
4.
Department of Earth and Environmental Sciences, University of Windsor, Windsor, ON N9B 3P4, Canada
5.
CICESE, Department of Earth Sciences, P. O. Box 434843, San Diego, CA 92143, USA

基金项目:

国家自然科学基金青年基金项目 41204052

国家博士后基金项目 2014M550780

山西省自然基金项目 2014011032-2

山西省回国留学人员基金项目 2014-021

详细信息

作者简介:
张淑伟(1973-), 女, 博士, 岩石磁学和环境磁学专业, 从事环境磁学和古气候变化研究。E-mail:zhangshuwei@163.com

中图分类号: P318
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- 被引次数: 0
出版历程
- 收稿日期: 2016-12-06
- 刊出日期: 2017-02-01

ANISOTROPY OF MAGNETIC SUSCEPTIBILITY:THEORY AND CASE STUDIES

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, 100081, China
2.
College of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, China
3.
College of Resources, Environment and Tourism, Capital Normal University, Beijing 100048, China
4.
Department of Earth and Environmental Sciences, University of Windsor, Windsor, ON N9B 3P4, Canada
5.
CICESE, Department of Earth Sciences, P. O. Box 434843, San Diego, CA 92143, USA

摘要

摘要: 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。
- 磁化率各向异性 /
- 磁铁矿 /
- 玄武岩 /
- 湖泊沉积物 /
- 岩石磁学
Abstract: Anisotropy of magnetic susceptibility (AMS) has been widely utilized to study orientation of magnetic minerals due to the paleo-flow, and direction of magnetic minerals or their recrystallization caused by tectonic stress. We presented the AMS principle and parameters, and studied AMS changes in:(1) two basalt samples (unheated and heated) that have experienced tectonic deformation, with multidomain (MD) titanomagnetite as dominant magnetic minerals, and this is from a previous study; (2) lake sediments that are majorly characterized by MD magnetite. The results show that AMS can sensitively investigate orientation of magnetic minerals.
- anisotropy of magnetic susceptibility (AMS) /
- magnetite /
- basalt /
- lake sediment /
- rock magnetism

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图 1 费林图(a)和磁化率各向异性-椭球形状参数图(b)^[15]

Figure 1. Flinn (L-F) and P_j-T diagrams

下载: 全尺寸图片幻灯片

图 2 磁化率各向异性图^[15]

K₁—方框；K₂—三角；K₃—实心圆；F—片理面；B—层面；红箭头—挤压应力方向
A-D—未加热和加热(580 ℃)石灰岩样品的等面积投影图和费林图；E-H—未加热和加热(580 ℃)玄武岩样品的等面积投影图和费林图；Ⅰ, J—受南北向挤压构造应力的玄武岩样品磁化率各向异性最小轴的等密度曲线(Ⅰ)和这些玄武岩体的层面法线等密度曲线(J)

Figure 2. Anisotropy of magnetic susceptibility Map

下载: 全尺寸图片幻灯片

图 3 干海湖泊磁化率各向异性图

a, b, c-上层、转换层、中层的磁化率各向异性-形状参数图; d, e, f-各层的等面积投影图

Figure 3. Anisotropy of magnetic susceptibility Map of Dry lake

下载: 全尺寸图片幻灯片

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