The SushiBar: An automated system for paleomagnetic investigations
The SushiBar: An automated system for paleomagnetic investigations
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SushiBar：古地磁研究自动化系统
DOI：
10.1029/2011gc003985
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
S.A. Gilder
中科院分区：
文献类型：
--
作者：
S.A. Gilder
我们提出了一种新的自动化系统，该系统基于三轴超导磁力计和定制线圈，旨在对典型古地磁调查中使用的圆柱形标本进行实验。该系统，它类似于一个寿司吧，有利于逐步交变磁场退磁高达99个样品每个加载的轨道。它还使研究人员能够使用无滞后剩磁（ARM）在高达95 mT的峰值交变磁场和高达0.17 mT的直流偏置磁场的任何磁化窗口中探索磁特性。例如，部分ARM（pARM）谱表征岩石中的磁性晶粒尺寸分布，但很少测量pARM谱，因为手动获取一个样品的完整曲线需要至少两个小时。SushiBar在不到100小时的时间内实现了99次这样的曲线。利用SushiBar测量了中国西部西水沟剖面陆相沉积物的pARM sprectra，以及在三个离散的转换场窗口中ARM的粘度和各向异性。平均晶粒尺寸沿2200 m厚的截面保持沿着恒定，但磁粘度从截面底部到顶部系统地变化;具有高磁粘度的样品平均也具有更高比例的非粘性材料。从最低的开关场的主轴方向各向异性磁化率的主轴方向相关。主轴方向定义在较高的开关场系统地偏离那些在较低的开关场，也许定义的剩磁携带颗粒的结构。
We present a new, automated system based on a three‐axis superconducting magnetometer and a custom‐made coil designed to experiment on cylindrical specimens used in typical paleomagnetic investigations. The system, which resembles a sushi bar, facilitates stepwise alternating field demagnetization of up to 99 samples per loaded track. It also enables researchers to explore magnetic properties using an anhysteretic remanent magnetization (ARM) in any coercivity window up to peak alternating fields of 95 mT with direct current bias fields up to 0.17 mT. For example, partial ARM (pARM) spectra characterize magnetic grain size distributions in rocks, yet rarely are pARM spectra measured because the complete curve for one sample takes at least two hours to acquire manually. The SushiBar achieves 99 such curves in slightly less than 100 hours. Using the SushiBar, we measured the pARM sprectra, as well as the viscosity and anisotropy of ARM in three discrete switching field windows, of continental sediments from the Xishuigou section (western China). The average grain size remains constant along the 2200 m‐thick section, yet magnetic viscosity varies systematically from bottom to top of the section; samples with high magnetic viscosities also have higher proportions of non‐viscous material on average. Principal anisotropy axis directions from the lowest switching fields correlate well with principal axis directions from anisotropy of magnetic susceptibility. Principal axis directions defined at higher switching fields systematically deviate from those at lower switching fields, perhaps defining the fabric of the remanence‐carrying grains.
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天然和合成样品中的磁粘度、扩散后效应和失调。
影响因子：
2.8
作者：
B. Moskowitz
通讯作者：
B. Moskowitz
影响因子：
2.8
作者：
W. Owens
通讯作者：
W. Owens
影响因子：
3.2
作者：
W. F. Jaep
通讯作者：
W. F. Jaep
影响因子：
2.8
作者：
R. Girdler
通讯作者：
R. Girdler
DOI：
10.1144/gsl.sp.2004.238.01.01
发表时间：
2004
期刊：
Geological Society, London, Special Publications
影响因子：
--
作者：
F. Martín-Hernández;C. M. Lüneburg;C. Aubourg;M. Jackson
通讯作者：
F. Martín-Hernández;C. M. Lüneburg;C. Aubourg;M. Jackson