The effect of sediments on crustal magnetization


Marine magnetic anomalies are a critical observation used to investigate seafloor spreading and the transition between oceanic and continental crust at passive margins. Here we show that the accumulation of sediments over the oceanic crust has a thermal effect which can lead, under certain conditions, to the complete removal of magnetization in the upper oceanic crust. This, in turn, may have important consequences for how we understand passive margins and the accuracy of plate kinematic models.