Lithospheric Compression in the Central Indian Ocean in the Light of New, Deep-Penetration MCS Data

大西洋中部海脊南纬31度至35度的三维磁性反转的轴线剖面显示，中部沉积物的磁化强度较低，而三个相邻扩展段的信号尖端磁化强度较高。该项目将测量岩石的磁性，以确定计算的中段轴向磁化强度低和尖端高，是由于源磁化源较弱的增厚地壳、平均地壳厚度和磁场强度，还是正常磁化但地壳变薄所致。利用岩石磁性数据和更精细的三维反演，将解决假设的地幔热柱在多大程度上抑制磁化幅度的问题，以及由于分馏过程而强烈磁化的不连续面附近的缓慢扩展中心的问题。

An along axis profile of 3-D magnetic inversions for the Mid- Atlantic Ridge 31 to 35 degrees south, show low magnetization at the mid-sediments and high magnetizations at the sigment tips for three adjacent spreading segments. This project will measure rock magnetic properties to determine if the calculated axial magnetization low at the mid-segment, and the sigment tip highs, results from thickened crust with weakly magnetized sources, average crustal thickness and magnetic strength, or normal magnetization but thinned crust. With the rock magnetic data and the finer scale 3-D inversions, the questions of to what extent the hypothesized mantle plume depress magnetization amplitudes, and are slow spreading centers near discontinuities strongly magnetized because of fractionation processes, will be addressed.