Modeling ferrous-ferric iron chemistry with application to martian surface geochemistry
Modeling ferrous-ferric iron chemistry with application to martian surface geochemistry
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DOI：
10.1016/j.gca.2007.10.012
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发表时间：
2008-01-01
影响因子：
5
通讯作者：
Catling, David C.
中科院分区：
文献类型：
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作者：
Marion, Giles M.;Kargel, Jeffrey S.;Catling, David C.
火星全球探测者号、火星探测漫游者号和火星快车号任务激发了人们对火星表面化学演化的大量思考。最近的主要使命发现包括黄钾铁矾（一种硫酸铁盐）的存在，它需要从酸性硫酸盐盐水中形成，以及火星上赤铁矿和针铁矿的存在。最近的三价铁模型主要集中在25 C上，这是探索火星等冷天体地球化学历史的模型的主要限制。直到最近，我们对低温含铁卤水的研究涉及亚铁而不是三价铁，这显然也是一个局限性。本工作的目的是：（1）将三价铁化学添加到现有的二价铁地球化学模型（FREZCHEM）中，（2）将二价铁/三价铁地球化学模型扩展到更低的温度（
The Mars Global Surveyor, Mars Exploration Rover, and Mars Express missions have stimulated considerable thinking about the surficial geochemical evolution of Mars. Among the major recent mission findings are the presence of jarosite (a ferric sulfate salt), which requires formation from an acid-sulfate brine, and the occurrence of hematite and goethite on Mars. Recent ferric iron models have largely focused on 25 C, which is a major limitation for models exploring the geochemical history of cold bodies such as Mars. Until recently, our work on low-temperature iron-bearing brines involved ferrous but not ferric iron, also obviously a limitation. The objectives of this work were to (1) add ferric iron chemistry to an existing ferrous iron model (FREZCHEM), (2) extend this ferrous/ferric iron geochemical model to lower temperatures (