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首页> 外文期刊>Physics of the Earth and Planetary Interiors: A Journal Devoted to Obsevational and Experimerntal Studies of the Chemistry and Physics of Planetary Interiors and Their Theoretical Interpretation >Microwave palaeointensity results from the Matuyama-Brunhes geomagnetic field reversal
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Microwave palaeointensity results from the Matuyama-Brunhes geomagnetic field reversal

机译：Matuyama-Brunhes地磁场反转产生的微波古强度

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摘要

We present new palaeointensity and palaeodirectional results from the Matuyama-Brunhes geomagnetic field reversal. Volcanic sequences from La Palma and Guadeloupe record the Matuyama-Brunhes boundary, possible precursors. and fluctuations in the magnetic field prior to the main polarity reversal. Absolute palaeointensity was determined using the microwave technique and palaeodirectional results were obtained from thermal demagnetisation. Ten flows from the 29 flows studied gave reliable mean palaeointensities; however, only 1 of the 10 flows records a transitional direction. The VDM determined from this flow is 1.9 +/- 0.6 (+/-sigma) x 10(22) A m(2). Analysis of all Matuyama-Brunhes data suggests that the main directional changes occurred once the VDM was reduced below 3 x 10(22) A m(2)(similar to 35% of the present field value).
机译：我们介绍了Matuyama-Brunhes地磁场反转产生的新的古强度和古方向结果。拉帕尔玛岛和瓜德罗普岛的火山层序记录了Matuyama-Brunhes边界，可能是前兆。和主极性反转之前的磁场波动。使用微波技术确定绝对古强度，并通过热退磁获得古方向结果。在研究的29个流中，有10个流给出了可靠的平均古强度;但是，这10个流中只有1个记录了过渡方向。从该流量确定的VDM为1.9 +/- 0.6（+/- sigma）x 10（22）A m（2）。对所有Matuyama-Brunhes数据的分析表明，一旦VDM减小到3 x 10（22）A m（2）（类似于当前场值的35％）以下，就会发生主要的方向变化。

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