| 岩浆岩磁组构的实验模拟研究 |
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| 引用本文： | 林万智,唐大仕.岩浆岩磁组构的实验模拟研究[J].地球物理学报,1998,41(2):226-233. |
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| 作者姓名： | 林万智 唐大仕 |
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| 作者单位： | 北京大学地质学系,北京 100871 |
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| 基金项目： | 国家自然科学基金!49174193 |
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| 摘 要： | 岩浆岩的模拟实验，由于其实验条件的可控性，能够较好地研究岩浆岩的影响因素及其机理．本文实验表明，岩浆岩的磁组构除与成岩时的流动有关外，还受地磁场及重力场的影响，当流动较强时，岩浆岩的磁线理与流动方向有很好的一致性；当流动较弱时，地磁场方向的影响更大．另外，由于岩浆岩较弱的磁各向异性，以及成岩后期各种因素的影响，使其机理呈现复杂性，主轴方位具有分散性．
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| 关 键 词： | 岩浆岩 磁组构 磁化率各向异性 模拟实验 |
| 收稿时间： | 1996-05-20 |
A MODEL EXPERIMENT STUDY ON MAGNETIC FABRIC OF IGNEOUS ROCKS |
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| LIN WAN-ZHI, TANG DA-SHI,REN JING-QIU.A MODEL EXPERIMENT STUDY ON MAGNETIC FABRIC OF IGNEOUS ROCKS[J].Chinese Journal of Geophysics,1998,41(2):226-233. |
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| Authors: | LIN WAN-ZHI TANG DA-SHI REN JING-QIU |
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| Institution: | Department of Geology, Peking University. Beijing 100871, China |
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| Abstract: | In recent years, magnetic fabric of deformed rocks, metamorphic rocks andsedimentary rocks are discussed in great detail. However, the knowledge aboutcharacteristic and mechanism of magnetic fabric of igneous rocks is very poor. Thestudy is a model experiment on magnetic fabric of igneous rocks. Although it iscommonly suggested that the maximum axis of magnetic susceptibility ellipsoidparallels to the flow direction of magma. mis stUdy proves that it is not the commoncase. In contrast it only occurs when the magma flow is strong enough and the rockis undeformed. The magnetic fabric of igneous rock is resulted from the combinedeffects of the factors such as magnetic force, gravity and magma flow. |
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| Keywords: | :igneous rock Magnetic fabric Magnetic suscephbility bosotropy Model experiment |
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