Inversion of ocean bottom magnetotelluric data revisited
Inversion of ocean bottom magnetotelluric data revisited
复制标题
海底大地电磁数据反演再探讨
DOI：
10.1029/jb089ib03p01829
复制
发表时间：
1984
影响因子：
--
通讯作者：
R. Parker
中科院分区：
文献类型：
--
作者：
D. Oldenburg;K. Whittall;R. Parker
本文对太平洋板块三个海底大地电磁资料进行了重新解释。初步分析发现，岩石圈年龄与每个地点下方导电带的深度之间存在相关性。这项工作还表明，电阻率在导体下方增加。这种分析，其中包括新的方法来构建一维电导率模型，表明电阻率的假设增加是不需要的数据。它还揭示了一个意想不到的大非唯一性固有的解释这些数据。以前报道的岩石圈年龄趋势仍然存在，但它们并不像最初认为的那样强烈。最后，它严格表明，不同的年龄网站是不同的，没有一个一维模型可以占所有三个数据集。
Three ocean bottom magnetotelluric data sets from sites on the Pacific plate are reinterpreted. The initial analysis found a correlation between the lithospheric age and the depth to a conductive zone beneath each site. That work also suggested that the resistivity increased below the conductor. This analysis, which includes new methods for constructing one-dimensional conductivity models, shows that the postulated increase in resistivity is not demanded by the data. It also reveals an unexpectedly large nonuniqueness inherent in the interpretation of these data. The previously reported trends with lithospheric age still exist, but they are not as strong as initially believed. Finally, it is shown rigorously that the different age sites are distinct in that no one-dimensional model can account for all three data sets.