多少地球内部的热量来自于原始的加热和它是怎样改变自地球形成的?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换

多少地球内部的热量来自于原始的加热和它是怎样改变自地球形成的?

2021 - 07 - 27 - t03:27:08z

我想大致了解地球和其他行星的行为随着时间的一个项目。虽然我可以找到很多好的数据有多少辐射加热,我找不到任何原始的热量。 内部热量和时间有什么关系呢? 欢呼。

回答由Dikran袋多少地球内部的热量来自原始的加热和它是怎样改变自地球形成的?

2021 - 07 - 28 - t10:20:34z

< a href = " https://en.wikipedia.org/wiki/William_Thomson _1st_Baron_Kelvin # Age_of_the_Earth: _geology”rel = " nofollow noreferrer " >威廉·汤普森第一开尔文男爵< / >了地球大约20到4亿岁的时候,基于从一个假定的熔融状态冷却的速度。这将意味着地球的原始热基本上已经丢失了,所以你可以认为答案是零(假设开尔文的计算仍然是合理的)。However once energy is "thermalised" it loses any memory of where it is from, which makes that answer questionable.

[I assume that by "radiative heating" you mean heating from radioctive decay in the mantle, rather than radiative heating of the surface by the sun. There is also the Kelvin-Helmholtz heating from the iron sinking to form the core, but presumably that is finished now?]

回答通过旋钮刮子多少地球内部的热量来自原始的加热和它是怎样改变自地球形成的?

2021 - 07 - 29 - t18:08:44z

威廉·汤森的计算是一个可怜的一阶近似:地球的熔融blob和计算需要多长时间太冷至零附近k·汤姆森不知道什么,首先,是初始温度有多高在增生的初期阶段地球的形成。另一件事汤姆森不知道在19世纪中期是地幔是一个很好的绝缘体,阻止大部分原始热量逃离。 尽管不确定性成分和大量的特定化学地球深处,现代钻石砧工作精制地球材料的热导率值在高温和压力。根据加州大学圣克鲁斯,昆汀·威廉姆斯,在众多国家中,已经做了很多工作在深度限制在大地热流值材料: < blockquote > < a href = " https://www.scientificamerican.com/article/why-is-the-earths-core-so/ " rel = " nofollow noreferrer " >需要相当长时间加热地球的搬出去。This occurs through both "convective" transport of heat within the earth's liquid outer core and solid mantle and slower "conductive" transport of heat through nonconvecting boundary layers, such as the earth's plates at the surface. As a result, much of the planet's primordial heat, from when the earth first accreted and developed its core, has been retained.

You can find and read more of his work here.