好奇号火星车发现的碳酸盐表明古代火星上存在碳循环
作者：小柯机器人 发布时间：2025/4/18 14:35:24
本期文章： 《科学》：Volume 388 Issue 6744
近日，加拿大卡尔加里大学Benjamin M. Tutolo团队报道，好奇号火星车发现的碳酸盐表明古代火星上存在碳循环。相关论文发表在2025年4月18日出版的《科学》杂志上。
古代火星表面有液态水和富含二氧化碳的大气层。这种大气将与地壳岩石相互作用，可能会留下其存在的矿物学记录。研究组使用好奇号探测器收集的数据分析了火星盖尔陨石坑89米地层剖面的组成。菱铁矿是一种碳酸铁矿物，其丰度为4.8至10.5重量%，与高度水溶性的盐共存。
他们推断，菱铁矿是在水岩反应和蒸发的驱动下，在有限的水条件下形成的。与轨道数据的比较表明，类似的地层（全球沉积）封存了相当于2.6至36毫巴的大气二氧化碳。这些沉积物中羟基氧化铁的存在表明，古代火星上部分封闭的碳循环将一些以前封存的二氧化碳送回了大气。
附：英文原文
Title: Carbonates identified by the Curiosity rover indicate a carbon cycle operated on ancient Mars
Author: Benjamin M. Tutolo, Elisabeth M. Hausrath, Edwin S. Kite, Elizabeth B. Rampe, Thomas F. Bristow, Robert T. Downs, Allan Treiman, Tanya S. Peretyazhko, Michael T. Thorpe, John P. Grotzinger, Amelie L. Roberts, P. Douglas Archer, David J. Des Marais, David F. Blake, David T. Vaniman, Shaunna M. Morrison, Steve Chipera, Robert M. Hazen, Richard V. Morris, Valerie M. Tu, Sarah L. Simpson, Aditi Pandey, Albert Yen, Stephen R. Larter, Patricia Craig, Nicholas Castle, Douglas W. Ming, Johannes M. Meusburger, Abigail A. Fraeman, David G. Burtt, Heather B. Franz, Brad Sutter, Joanna V. Clark, William Rapin, John C. Bridges, Matteo Loche, Patrick Gasda, Jens Frydenvang, Ashwin R. Vasavada
Issue&Volume: 2025-04-18
Abstract: Ancient Mars had surface liquid water and a dense carbon dioxide (CO2)–rich atmosphere. Such an atmosphere would interact with crustal rocks, potentially leaving a mineralogical record of its presence. We analyzed the composition of an 89-meter stratigraphic section of Gale crater, Mars, using data collected by the Curiosity rover. An iron carbonate mineral, siderite, occurs in abundances of 4.8 to 10.5 weight %, colocated with highly water-soluble salts. We infer that the siderite formed in water-limited conditions, driven by water-rock reactions and evaporation. Comparison with orbital data indicates that similar strata (deposited globally) sequestered the equivalent of 2.6 to 36 millibar of atmospheric CO2. The presence of iron oxyhydroxides in these deposits indicates that a partially closed carbon cycle on ancient Mars returned some previously sequestered CO2 to the atmosphere.
DOI: ado9966
Source: https://www.science.org/doi/10.1126/science.ado9966
期刊信息
Science：《科学》，创刊于1880年。隶属于美国科学促进会，最新IF：63.714
官方网址：https://www.sciencemag.org/
投稿链接：https://cts.sciencemag.org/scc/#/login