Paleointensity measurements of oceanic basalt by using a new method

我已经准备好了古强度测量的实验设备，并完成了它们的安装。我参加了在南马里亚纳海槽的研究巡航，在那里我们收集了海底的岩芯和玄武岩样本。岩心样品的热退磁表明，典型的阻塞温度为200-300度和580度。方向的倾角与地磁场的倾角相似。这些结果表明，低闭塞温度分量主要由原始温度分量的热剩余磁化作用主导，应对该分量进行古强度测量。

I have prepared experimental equipments for the paleointensity measurement and finished setting up of them. I took part in research cruises at the Southern Mariana Trough, in which we collected cores and block samples of basalt from the seafloor. Thermal demagnetizations on samples from the cores show that typical blocking temperatures are 200-300 and 580 degree. Inclinations of the directions are similar to that of the geomagnetic field. These results suggest that the low blocking temperature component is dominated by thermal remanent magnetization of primary one and paleointensity measurements should be applied to the component.