From the chondrite-normalized REE spider diagrams at 16:30, it seems that it’s less a case of elevated Eu and Ce and more that absolutely everything else is elevated in the same way except for Eu and Ce, as if they have been “left behind”. In fact Ce is elevated more in the barren spider diagram than the fertile. Eu is at approximately 1 in both, but everything else around it is elevated in the same proportion, giving the illusion of a Eu deficiency, when in fact it seems to rather be a case of the same amount of Eu, but more of everything around it. Imagine that you “pin” the Ce and Eu data points on the spider charts so that they don’t move and then scale the rest of the values evenly on the y-axis.
From the chondrite-normalized REE spider diagrams at 16:30, it seems that it’s less a case of elevated Eu and Ce and more that absolutely everything else is elevated in the same way except for Eu and Ce, as if they have been “left behind”. In fact Ce is elevated more in the barren spider diagram than the fertile. Eu is at approximately 1 in both, but everything else around it is elevated in the same proportion, giving the illusion of a Eu deficiency, when in fact it seems to rather be a case of the same amount of Eu, but more of everything around it. Imagine that you “pin” the Ce and Eu data points on the spider charts so that they don’t move and then scale the rest of the values evenly on the y-axis.