做ringwoodite矿物质指向一个“海洋的价值”的水,或一个真正的地下海洋?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 07 - t16:05:30z //www.hoelymoley.com/feeds/question/770 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/770 14 做ringwoodite矿物质指向一个“海洋的价值”的水,或一个真正的地下海洋? 错误 //www.hoelymoley.com/users/284 2014 - 05 - 05 - t02:04:14z 2014 - 05 - 05 - t06:47:22z < p >看来,答案是,很有可能,水ringwoodite矿物质,指的是一个“海洋的价值”的水,不是一个真正的地下海洋。< / p > < p > < >强做ringwoodite矿物质指向一个“海洋的价值”的水,或一个真正的地下海洋?< /强> < / p > < p > < img src = " https://i.stack.imgur.com/7K3AD.jpg " alt = "在这里输入图像描述" > < / p > //www.hoelymoley.com/questions/770/-/774 # 774 14 答案由hugovdberg做ringwoodite矿物质指向一个“海洋的价值”的水,或一个真正的地下海洋? hugovdberg //www.hoelymoley.com/users/79 2014 - 05 - 05 - t06:47:22z 2014 - 05 - 05 - t06:47:22z

A "true subterranean ocean" would suggest a vast amount of liquid water in the mantle. This is most probably not present, for which there are a number of clues.

First of all, when looking at the temperature (~2000K) and pressure (~20GPa) in the transition zone and look at a phase diagram for water it is clear water can't exist as a liquid even though the temperature isn't visible in the diagram. The exact phase isn't clear, it could be a solid or a supercritical liquid.

A second clue is in seismology. Earthquakes produce two types of waves, P-type and S-type, of which only the first can propagate through liquids, see for example this page. As a large body of liquid would produce a large shadow in seismic reflections, and these aren't well known (apart from the outer-core-shadow), it is unlikely there is much liquid water in the mantle.

Also, note that the water in ringwoodite isn't present as water molecules, but as hydrogen and oxygen ions, according to wikipedia.

Therefore, if there is indeed an ocean's worth of water present in the mantle transition zone, it will be there as a solid, which in my opinion can't be called a subterranean ocean.

Phase diagram for water from: http://www1.lsbu.ac.uk/water/phase.html

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