一个没有历史的类地行星的碳基生命形式,将有石灰石吗?- 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 - 04 - 11 - t15:14:16z //www.hoelymoley.com/feeds/question/14354 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/14354 7 一个没有历史的类地行星的碳基生命形式,将有石灰石吗? TylerH //www.hoelymoley.com/users/421 2018 - 06 - 04 - t21:15:59z 2018 - 06 - 06 - t00:46:35z < p >石灰岩的我的理解程度是关于维基百科页面的顶端说:< / p > < blockquote > < p >石灰岩是一种沉积岩,主要由骨骼碎片组成的海洋生物如珊瑚、有孔虫、软体动物。它的主要材料是矿物方解石和霰石,这是不同的晶体形式的碳酸钙(碳酸钙)。< / p > < /引用> < p >是什么吸引了我的好奇心”主要是“这个词……我不能告诉,如果这意味着“主要部分的< em > < / em >石灰岩”是(生物的骨骼碎片)”,或者如果它的意思是“石灰石的一部分(通常情况下)是(生物的骨骼碎片)”。

Phrased in the most general and interesting way (to me):

Given an Earth-like planet with all the right ingredients (e.g. large bodies of liquid water, iron-nickel partially-liquid core, etc.) with one exception—no history of carbon-based life forms—would we find significant amounts of limestone like we have on Earth today?

 //www.hoelymoley.com/questions/14354/-/14357 # 14357 5 回答由BillDOe毫无防备的类地行星的碳基生命形式的历史,会有石灰石吗? BillDOe //www.hoelymoley.com/users/2959 2018 - 06 - 05 - t00:55:53z 2018 - 06 - 05 - t00:55:53z < p >我不得不说,是的。一旦生活在世界上的海洋进化,绝大多数的石灰岩形成是通过有机的过程。然而,在生命进化,通过无机石灰岩形成过程中雨水下降通过CO 2 <子> < /订阅>丰富大气反应形成弱碳酸溶液,然后与对含钙矿物的反应形成存在方解石。然后冲进世界海洋形成石灰岩矿床。< br > < br >与< a href = " http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/limestone.html " rel = " noreferrer " > gsu.edu < / >: < / p > < blockquote > < p >石灰岩可能形成及或生化过程。< br > < br >无机起源的另一种形式的石灰岩鲕状灰岩、石灰岩形成的小球形颗粒称为鲕粒。< / p > < /引用> < p >的论文< a href = " https://news.stanford.edu/news/2004/june2/lowegeo - 62. - html”rel = " noreferrer " > Stanford.edu < / >: < / p > < blockquote > < p >碳酸分离成氢离子,发现进入风化矿物的结构和碳酸氢盐,顺着河流和小溪作为石灰岩沉积在海洋沉积物和其他矿物质。< / p > < /引用> < p >所以即使在这样一个世界没有碳基生命,石灰石仍可能形式如果2有限公司<子> < /订阅>丰富大气、水(因此雨),对含钙地壳存款。虽然本文从斯坦福理论,注意,这并不意味着假设,基于坚实的科学(我相信)。< / p > //www.hoelymoley.com/questions/14354/-/14358 # 14358 1 回答由user12525毫无防备的类地行星的碳基生命形式的历史,会有石灰石吗? user12525 //www.hoelymoley.com/users/0 2018 - 06 - 05 - t07:17:36z 2018 - 06 - 05 - t11:06:38z < p >沉积记录显示地球上第一次大量的石灰岩来自< a href = " https://en.wikipedia.org/wiki/Stromatolite " rel = " nofollow noreferrer " >叠层石< / >和有孔虫的< a href = " https://en.wikipedia.org/wiki/Precambrian " rel = " nofollow noreferrer " >前寒武纪< / >。生活爆炸后,两个主要的碳酸存款注册:< / p > < p > <强>——强大的盆地沉积在海岸< a href = " https://en.wikipedia.org/wiki/Coral_reef " rel = " nofollow noreferrer " >珊瑚礁< / >。< /强> < / p > < p > <强>——大型底栖生物存款< a href = " https://en.wikipedia.org/wiki/Foraminifera " rel = " nofollow noreferrer " >有孔虫< / >和< a href = " https://en.wikipedia.org/wiki/Coccolithophore " rel = " nofollow noreferrer " > coccolithophoridae在海底< /强> < / > < / p > < p >石灰岩使用这些骨骼碎片,所得到的碳酸钙在成岩作用,但并非总是如此。在平静的环境中,就可以形成泥岩,主要来自藻类。另一个例外是< a href = " https://en.wikipedia.org/wiki/Dunham_classification " rel = " nofollow noreferrer " >结晶灰岩< / >已经改变了他们的纹理在< a href = " https://en.wikipedia.org/wiki/Diagenesis " rel = " nofollow noreferrer " >成岩作用< / >和skelets不知名的,但这并不意味着碳酸钙不是有机的起源。< / p > < p > < a href = " https://i.stack.imgur.com/5AMaN.jpg " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/5AMaN.jpg " alt = "在这里输入图像描述" > < / > < / p > < p > <强>邓纳姆碳酸盐< /强>分类。图片来自:< a href = " https://commons.wikimedia.org/wiki/File The_Rebooted_Dunham_Classification.jpg”rel = " nofollow noreferrer " > commons.wikimedia.org < / > < / p > < p >还有一个例外,注意:< a href = " https://en.wikipedia.org/wiki/Oolite " rel = " nofollow noreferrer " >鲕粒岩< / >。鲕粒岩及具体的东西在一个生物碎屑或碎屑。这是什么我读过结构形成的海滩也由于藻类。< / p > < p >不管怎样,一个非寿险岩石行星可以产生碳酸盐在他第一次岩浆阶段。 The rock is called carbonatite, wich is a magmatic rock, not a sedimentary limestone. You could then have some scattered sedimentary deposits where cement is CaCo3. I find it unlikely, but erosion of carbonatites could lead to true limestones.

There are too terrestrial limestones formed on lakes and rivers called tufa.

"Recently it has been demonstrated that microbially induced precipitation may be more important than physico-chemical precipitation. Pedley et al. (2009) showed with flume experiments that precipitation does not occur unless a biofilm is present, despite supersaturation."

source: wikipedia (see quoted paper)

There is no evidence of such deposits on Mars neither. Carbonates are found , but being magnesite (MgCo3) the main carbonate with little percentages of calcite.

So, I can be wrong, but my answer to "significant amounts" is no, knowing little deposits of CaCO3 could thermodinamicaly been formed on a non-life rocky planet.

 //www.hoelymoley.com/questions/14354/-/14362 # 14362 2 回答由Gimelist毫无防备的类地行星的碳基生命形式的历史,会有石灰石吗? Gimelist //www.hoelymoley.com/users/725 2018 - 06 - 06 - t00:46:35z 2018 - 06 - 06 - t00:46:35z < blockquote > < p >在毫无防备的类地行星的碳基生命形式的历史,会有石灰石吗?< / p > < /引用> < p >短答:<强> < /强>。< / p > < p >石灰岩是氧化碳碳的形式:碳酸盐:有限公司<子> 3 < /订阅> <一口> 2 - < /一口>。这不同于有机碳,这主要是由碳氢(碳氢化合物)分子和化合物。< / p > < p >石灰岩是沉积岩主要由方解石组成或霰石——碳酸钙。正如你提到的,碳酸钙是来自死亡的海洋动物的壳。我会注意,如果你有一个与碳基生命星球,但他们并不会形成石灰岩形成的壳从碳酸钙这过程将不存在。< / p > < p >石灰岩也可以形成化学。有碳酸钙溶解在海洋和湖泊。如果你蒸发和干燥,碳酸钙沉淀。碳酸钙的溶解度取决于博士如果这些水体变得不那么酸(pH值上升),您将化学沉积的碳酸钙沉淀。< / p > < p >你知道白色的规模在茶壶吗?这是碳酸钙。石灰岩。 So this can form without any life, just by changing the temperature of the water, this changing the solubility of the calcium carbonate. Examples of chemically precipitated "limestones" are tufa and travertine.

If we venture out of the "sedimentary limestones", there are also carbonatites, which are igneous rocks crystallised out of a carbonate rich magma. These are rare on Earth (we know of only one volcano that erupts this stuff), but could be more common on other planets. Weathering of these rocks can produce proper sedimentary limestones.
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