Volatile, Isotope, and Organic Analysis of Martian Fines with the Mars Curiosity Rover
Volatile, Isotope, and Organic Analysis of Martian Fines with the Mars Curiosity Rover
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DOI：
10.1126/science.1238937
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发表时间：
2013-09-27
期刊：
影响因子：
56.9
通讯作者：
Grotzinger, J. P.
中科院分区：
文献类型：
--
作者：
Leshin, L. A.;Mahaffy, P. R.;Grotzinger, J. P.
来自Rocknest风成存款的样品被加热到835摄氏度左右，在氦气流和火星仪器套件中的Curtain的样品分析中分析了气体。H_2O、SO_2、CO_2和O-_2是主要的释放气体。水丰度（1.5至3重量%）和释放温度表明，H2O是结合在样品的无定形成分。细粒铁或镁碳酸盐的分解可能是大部分释放的CO2的来源。放出的O-2与Cl的释放是一致的，这表明氧是由氯氧化合物的热分解产生的。升高的Δ D值与最近的大气交换一致。碳同位素表明细粒中存在多种碳源。探测到了几种简单的有机化合物，但它们并不能确定来自火星。
Samples from the Rocknest aeolian deposit were heated to similar to 835 degrees C under helium flow and evolved gases analyzed by Curiosity's Sample Analysis at Mars instrument suite. H2O, SO2, CO2, and O-2 were the major gases released. Water abundance (1.5 to 3 weight percent) and release temperature suggest that H2O is bound within an amorphous component of the sample. Decomposition of fine-grained Fe or Mg carbonate is the likely source of much of the evolved CO2. Evolved O-2 is coincident with the release of Cl, suggesting that oxygen is produced from thermal decomposition of an oxychloride compound. Elevated delta D values are consistent with recent atmospheric exchange. Carbon isotopes indicate multiple carbon sources in the fines. Several simple organic compounds were detected, but they are not definitively martian in origin.