都是天然钻石制成的有机碳材料吗?- 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 - 08 - t02:38:29z //www.hoelymoley.com/feeds/question/7475 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/7475 6 都是天然钻石制成的有机碳材料吗? Marijn //www.hoelymoley.com/users/5372 2016 - 02年- 08 - t10:33:13z 2019 - 02年- 15 - t19:00:59z 创建< p >我读过,钻石的深度约180公里。由火山活动上面。但3亿年前的植物和树木水槽如此之深?抑或,无机碳,已经在地球,是钻石的来源吗?< / p >

I've heard also that there could be other exo-planets in the galaxy that are made of diamonds so it looks like it should be possible, or isn't that true?

//www.hoelymoley.com/questions/7475/-/7476 # 7476 7 卢·佩雷斯回答的都是天然钻石制成的有机碳材料吗? 卢佩雷斯 //www.hoelymoley.com/users/5274 2016 - 02年- 08 - t12:09:21z 2016 - 02年- 08 - t12:09:21z < p >钻石并不是由有机C。有机物宁愿成为石油、天然气、煤炭或完全溶解。< / p >

C itself isn't very common in earth's mantle, but subducted eclogites and peridotites can lead to the needed C-accumulation.

But also meteorite impacts can lead to the genesis of so called micro-diamonds due to the very short lasting but extreme conditions.

Diamond's genesis takes place in depths from 150 up to 700km and at temperatures about 1200-1400°C. Those conditions were present in the upper mantle during the archaeum and hadeum, that's why mining takes places mainly in older crustal zones.

You are right that volcanic activity brings diamond up to the crust and surface of the earth. This process is thought to take only some minutes... This is a very quick process so that the diamond crystal structure won't change back to graphite and it's also the reason many diamond deposits can be found in sediments.

I think that should answer your question. I don't know about the diamond exoplanets, though I've heard of it.. I'd say the process that leads to this is pretty unclear, but perhaps someone has clearer thoughts or information on this.

//www.hoelymoley.com/questions/7475/-/7477 # 7477 5 戈登斯坦格回答的都是天然钻石制成的有机碳材料吗? 戈登斯坦格 //www.hoelymoley.com/users/4507 2016 - 02 - 09 - t02:54:30z 2016 - 02 - 10 - t06:09:37z < p >不是那么快,我们不能说没有钻石制成的有机碳。有两种类型的钻石,基于美元的相对丰度^{12}加元和$ ^{13}加元同位素。轻的碳(相对$ ^{13}加元枯竭)被认为来自地壳含碳的岩石,其中可能包括一些有机碳,俯冲到地幔,recrystallised大深度和超高压,随后在表面,在金伯利岩或榴辉岩(如小榴辉岩钻石在马尔默挪威)。这些都是“榴辉岩钻石”。也有“重碳”钻石在起源、原始的地幔碳从未离开,直到喷出,金伯利岩。< / p >

BTW, the deepest known origin for diamonds is under Brazil, from a depth of 800 km, but Lew is right in that the majority of diamonds are from lesser depths, if you can regard >150 km as a 'lesser depth'.

//www.hoelymoley.com/questions/7475/-/7478 # 7478 3 Gimelist回答的都是天然钻石制成的有机碳材料吗? Gimelist //www.hoelymoley.com/users/725 2016 - 02 - 09 - t11:05:59z 2016 - 04 - 09 - t04:41:38z < blockquote > < p >但3亿年前的植物和树木水槽如此之深?< / p >

300 million years ago (Carboniferous) was a time when large amount of organic carbon was buried to a depth of several kilometres and formed large beds of coal. The pressure and temperature was only moderate (which is why you have coal and not diamonds).

Diamonds form at depths of hundreds of kilometres, and the source of the carbon can be any carbon. Inorganic carbon that was just there in the mantle, or organic carbon that came from any time in the Earth's history, not necessarily from the Carboniferous. So how do you get organic material hundreds of kilometres deep? The answer is subduction. I recommend you view this short video that does a terrific job in explaining of some of this stuff works:

http://www.youtube.com/watch?v=6wJBOk9xjto

there could be other exo-planets in the galaxy that are made of diamonds...

Not quite. Not "made of diamonds". Just planets that have a lot of carbon. In our Earth and the other rocky planets in our solar system there is a lot of oxygen. When you take oxygen and bond it with other elements (silicon, magnesium, iron, aluminium, etc) you end up having rocks. What would happen if a planet would have more carbon than oxygen? In that case, it would be carbon bonding to the elements, not oxygen. You would have rocks made out of carbides, instead of rocks composed of oxides. You probably know carbides: these are usually very strong materials and they are used in industry whenever you need to do hard mechanical stuff.

Anyway, what would happen if you had more carbon than needed to bond with everything else? In that case you would have free carbon that in certain depths in that specific planet would be just in the right condition to form diamond. But this diamond will most likely be mixed together with all of the other carbides so I'm not sure if you will have huge blocks of pure diamond. But who knows?

Some more reading in this article.

//www.hoelymoley.com/questions/7475/-/7691 # 7691 2 答案由Zbynek Burival都是天然钻石制成的有机碳材料吗? Zbynek Burival //www.hoelymoley.com/users/5639 2016 - 03 - 16 - t22:27:27z 2016 - 03 - 16 - t22:27:27z < p >使它更加困难,最近的研究显示microdiamonds的存在。微小的钻石(微观)被发现在蓝晶石或石榴石麻粒岩的岩石。所以我们解释金刚石形成至少部分是错误的(它们形成以低得多的压力然后预期)或者我们有一些麻粒岩和俯冲机制理解的问题——我们能拖麻粒岩前体150 +公里为地幔没有融化吗?看到一个最近的< a href = " https://www.researchgate.net/publication/262807235_First_finding_of_microdiamond_coesite_and_other_UHP_phases_in_felsic_granulites_in_the_Moldanubian_Zone_Implications_for_deep_subduction_and_a_revised_geodynamic_model_for_Variscan_Orogeny_in_the_Bohe " rel =“nofollow”> < / >。您还可以检查一些不太科学< a href = " http://www.mineralexpert.org/diamond-king-of-gems.php " rel =“nofollow”> < / >钻石概述。< / p >
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