Seismic and geochemical evidence for large-scale mantle upwelling beneath the eastern Atlantic and western and central Europe
Seismic and geochemical evidence for large-scale mantle upwelling beneath the eastern Atlantic and western and central Europe
复制标题
东大西洋以及西欧和中欧下方大规模地幔隆起的地震和地球化学证据
作者：
K. Hoernle;Yu;D. Graham
地震层析成像和新生代火山岩的同位素地球化学表明，存在一个大的，片状的上地幔上升流的区域，从大西洋东部延伸到中欧和地中海西部。后两个地区的伸展和裂谷带似乎位于上升流区中心与岩石圈底部的交点之上。铅，锶和钕同位素数据的所有三个地区收敛在一个有限的组成，推断是上涌地幔。
Seismic tomography and the isotope geochemistry of Cenozoic volcanic rocks suggest the existence of a large, sheet-like region of upwelling in the upper mantle which extends from the eastern Atlantic Ocean to central Europe and the western Mediterranean. A belt of extension and rifting in the latter two areas appears to lie above the intersection of the centre of the upwelling region with the base of the lithosphere. Lead, strontium and neodymium isotope data for all three regions converge on a restricted composition, inferred to be that of the upwelling mantle.