The zircons we studied were depleted in oxygen 18 relative to the mantle, and such depletion occurs only if the crystals formed from rocks that interacted with rain or snow 因?yàn)橄噍^于地函,我們所研究的鋯石,氧18含量偏低,而這種情形只有可能是晶體的母巖曾經(jīng)和雨水或雪發(fā)生交互作用。
If the next eruption is depleted in oxygen 18, then it is most likely still being fed by stagnant remnants of the original magma, which by now is probably more of a thick crystal mush than an explosive liquid 如果下一次的噴發(fā)較缺乏氧18,那麼它最有可能的來源是先前巖漿庫中滯留的殘馀物,此時可能是充滿結(jié)晶的糊狀物,而不是噴發(fā)的液態(tài)。