沉积记录显示地球上第一次大量的石灰岩来自[叠层石][1]和有孔虫的前寒武纪[2]。生活爆炸后,两个主要的碳酸存款注册:* * -强大的盆地沉积在海岸珊瑚礁[3]。* * * *——大型底栖生物存款(有孔虫)[4]和[coccolithophoridae][5]在海底* *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(结晶灰岩)[6],已经改变了他们的纹理在成岩作用[7]和skelets不知名的,但这并不意味着碳酸钙不是有机的起源。[![在这里输入图像描述][8]][8]* *邓纳姆碳酸盐分类* *。图片来自:[commons.wikimedia.org][9]还有另一个例外,注意到:[鲕粒岩][10]。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。 Anyhow, a non-life rocky planet can produce carbonates at his first magmatic phases. The rock is called [carbonatite][11], wich is a magmatic rock, not a sedimentary limestone. You could then have some scattered sedimentary deposits where [cement][12] 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][13]. > "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)][13] [There is no evidence of such deposits on Mars neither][14]. 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. [1]: https://en.wikipedia.org/wiki/Stromatolite [2]: https://en.wikipedia.org/wiki/Precambrian [3]: https://en.wikipedia.org/wiki/Coral_reef [4]: https://en.wikipedia.org/wiki/Foraminifera [5]: https://en.wikipedia.org/wiki/Coccolithophore [6]: https://en.wikipedia.org/wiki/Dunham_classification [7]: https://en.wikipedia.org/wiki/Diagenesis [8]: https://i.stack.imgur.com/5AMaN.jpg [9]: https://commons.wikimedia.org/wiki/File:The_Rebooted_Dunham_Classification.jpg [10]: https://en.wikipedia.org/wiki/Oolite [11]: https://en.wikipedia.org/wiki/Carbonatite [12]: https://en.wikipedia.org/wiki/Cementation_(geology) [13]: https://en.wikipedia.org/wiki/Tufa [14]: https://en.wikipedia.org/wiki/Carbonates_on_Mars