蛇纹石化,在火星表面水的消失?- 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 - 09 - t22:58:58z //www.hoelymoley.com/feeds/question/12954 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/12954 6 蛇纹石化,在火星表面水的消失? uhoh //www.hoelymoley.com/users/6031 2017 - 12 - 25 - t04:43:06z 2017 - 12 - 25 - t12:34:24z < p >《自然》杂志的论文最近< a href = " https://www.nature.com/articles/nature25031 " rel = " noreferrer " >原始hydrospheric水在地球上的不同命运和火星< / >(552年自然,391 - 394(2017年12月21日)doi: 10.1038 / nature25031)有关,许多最近的新闻文章。原始本质上的火星表面水可能被纳入变质岩,而不是失去了空间磁场然后后紧接着的气氛。< / p > < p >建议在火星表面矿物质的高铁含量相对于地球导致增强的蛇纹石化。< / p > < p >我很难理解这个术语的使用< em >蛇纹石化< / em >中使用如下所示的《自然》杂志论文的文摘。< / p > < p >维基百科显示了< a href = " https://en.wikipedia.org/wiki/Serpentine_subgroup " rel = " noreferrer " >蛇群矿物和矿物的< / > < a href = " https://en.wikipedia.org/wiki/Serpentinite " rel = " noreferrer " >蛇纹岩< / >,和< a href = " https://en.wikipedia.org/wiki/File: Folded_serpentinite.jpg rel = " noreferrer " >的岩层与蛇形模式< / >。< / p > < p >在这种情况下,< em >是蛇纹石化< / em >只是指一些水合矿物的形成是历史上的一个类被称为蛇纹岩或它的子群,或者是< em >蛇纹石化< / em >这一过程总是产生蛇形模式?< / p > < blockquote > < p >尽管主动运输进入地幔,水已经出现在地球的表面地质的大部分时间。然而,水从火星表面消失后不久,它的形成。虽然失去了火星上的水空间通过光解后地球的磁场,火星地壳的广泛蛇纹石化表明,变质水化反应中发挥了关键部分地壳的封存。这里我们量化的相对量水,可以从每颗行星的表面通过水合镁铁质外壳的土葬和变质作用,并计算矿物transition-induced容重变化条件的压力和温度升高。变质矿物组合相对FeO-rich火星熔岩可以持有约25%更多结构束缚水比变质陆地玄武岩,并在火星可以保留它在更大的深度。我们的计算表明,超过9%的体积火星地幔可能包含含水矿物物种由于表面反应,而大约4%体积的地幔。此外,无论是原始还是进化水化火星地壳显示不同的体积密度明显比无水的同龄人,与含水的镁铁质陆地地壳,转换到密集的榴辉岩在脱水。 This would have allowed efficient overplating and burial of early Martian crust in a stagnant-lid tectonic regime, in which the lithosphere comprised a single tectonic plate, with only the warmer, lower crust involved in mantle convection. This provided an important sink for hydrospheric water and a mechanism for oxidizing the Martian mantle. Conversely, relatively buoyant mafic crust and hotter geothermal gradients on Earth reduced the potential for upper-mantle hydration early in its geological history, leading to water being retained close to its surface, and thus creating conditions conducive for the evolution of complex multicellular life.

 //www.hoelymoley.com/questions/12954/-/12956 # 12956 5 弗雷德回答的蛇纹石化,在火星表面水的消失? 弗雷德 //www.hoelymoley.com/users/2470 2017 - 12 - 25 - t08:37:10z 2017 - 12 - 25 - t08:37:10z < p > < a href = " http://www.sandatlas.org/serpentinite/ " rel = " noreferrer " >蛇纹石化< / >是一个系统的,< / p > < blockquote > < p >化学反应,转化为无水硅酸铁镁矿物矿物(辉石、橄榄石)到含水硅酸盐矿物(蛇)加上一些其他可能像水镁石和磁铁矿。水镁石形式如果前体岩石富含镁(例如,纯橄榄岩)。磁铁矿形式是否有足够的铁(辉石岩)。通常蛇纹岩含铁磁铁矿的形式使深色蛇纹岩。< / p > < /引用>

In short, serpenitinization about the formation of hydrated silicate minerals not about the formation of snake (serpent) like skin patterns on rock.

 //www.hoelymoley.com/questions/12954/-/12958 # 12958 7 Gimelist回答的蛇纹石化,在火星表面水的消失? Gimelist //www.hoelymoley.com/users/725 2017 - 12 - 25 - t12:22:54z 2017 - 12 - 25 - t12:34:24z < blockquote > < p >是蛇纹石化只是指一些水合矿物的形成发生的一个类,它是历史上被称为蛇纹岩或子组< / p > < /引用> < p >是的。简单来说,反应是顽辉石+镁橄榄石+水=蛇形。< / p > < p > MgSiO <子> 3 < /订阅> + 2毫克<子> < /订阅> SiO <子> 4 < /订阅> + 2 h <子> < /订阅> O = Mg <子> 3 < /订阅>如果<子> 2 < /订阅> O <子> 5 < /订阅> (OH) <子> 4 < /订阅> < / p > < p >镁橄榄石和顽辉石(或更一般的,橄榄石和辉石)是常见的矿物质镁铁质火成岩。蛇形的形成锁水在生成的固体晶体结构。< / p > < p >你可以看到更多的例子蛇形形成反应5页< a href = " http://www.ifa.hawaii.edu/UHNAI/NAIweb/presentations/Mariana%20Forearc.pdf " rel = " nofollow noreferrer " >这个PDF文件< / >。< / p > < blockquote > < p >或蛇纹石化这一过程总是产生蛇形模式吗?< / p > < /引用> < p >。There is no such thing as "serpentine patterns". The image you link to is of "folded serpentinite". The "serpentinite" bit of it are the green layers, regardless of whether they are folded or not. The nice photogenic folded part is a later tectonic event that is unrelated to the formation of the serpentinite.
Baidu
map