Hurrah! Scientists have discovered something that is not necessarily in opposition to Biblical truth!
What a great argument to bolster one's own faith, or to convince doubters!
/sarcasm
I can only repeat: Overwought interpretations of half-understood scientific papers providing weak support for or at least not outright opposing established Biblical doctrines are of little to no use to anyone - and they represent a snare for people of faith.
Regards,
OK, not that we need it, but I will ask: How does this, in principle at least, oppose and exclude support for the Biblical account, if the water-rich mantle plumes can migrate upwards and break through the boundary to the upper mantle, so that water contained in the mantle plumes is released?