Diagenetic Features Reveal the Influence of the Greenheugh Pediment on the Alteration History of Gale Crater, Mars

IF 3.9 1区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Journal of Geophysical Research: Planets Pub Date : 2025-04-25 DOI:10.1029/2024JE008891

Jordan Ando, Rachel Y. Sheppard, Alexander B. Bryk, Vivian Sun, Christina H. Seeger, Abigail A. Fraeman, Alivia M. Eng, Linda Kah, Amanda N. Rudolph

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Abstract

We investigate the nature of diagenetic features encountered by the Curiosity rover within Mount Sharp from sols 1900–3,049. Using Curiosity's Mars Hand Lens Imager and Mast Camera (Mastcam), we classify diagenetic features into established morphological categories and assess their spatial distribution, density, and size. Our analysis reveals variations in diagenetic feature density and morphology linked to stratigraphic boundaries and proximity to the Greenheugh Pediment unconformity, highlighting the role of diagenetic fluids in shaping these features. We find a reduction in diagenetic features at the Jura to Knockfarril Hill member boundary, a spike in feature abundance at the Knockfarril Hill to Glasgow member boundary, and a strong statistical relationship between feature abundance and vertical distance from the Greenheugh Pediment. These trends point to a dynamic history of diagenetic fluid flow, influenced by variations in porosity, permeability, and structural controls, including the presence of the Pediment.

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成岩特征揭示格林休山形对火星盖尔陨石坑蚀变史的影响

我们研究了好奇号火星车从sols 1900 - 3049在夏普山遇到的成岩特征的性质。利用“好奇号”的火星手透镜成像仪和桅杆照相机（Mastcam），我们将成岩特征划分为已建立的形态类别，并评估了它们的空间分布、密度和大小。我们的分析揭示了成岩特征密度和形态的变化与地层边界和接近格林休山墙不整合有关，突出了成岩流体在塑造这些特征中的作用。我们发现Jura至Knockfarril Hill段边界的成岩特征减少，Knockfarril Hill至Glasgow段边界的特征丰度增加，并且特征丰度与与Greenheugh山墙的垂直距离之间存在很强的统计关系。这些趋势表明了成岩流体流动的动态历史，受孔隙度、渗透率变化和构造控制（包括山墙的存在）的影响。

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来源期刊

Journal of Geophysical Research: Planets Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)

CiteScore

8.00

自引率

27.10%

发文量

254

期刊介绍： The Journal of Geophysical Research Planets is dedicated to the publication of new and original research in the broad field of planetary science. Manuscripts concerning planetary geology, geophysics, geochemistry, atmospheres, and dynamics are appropriate for the journal when they increase knowledge about the processes that affect Solar System objects. Manuscripts concerning other planetary systems, exoplanets or Earth are welcome when presented in a comparative planetology perspective. Studies in the field of astrobiology will be considered when they have immediate consequences for the interpretation of planetary data. JGR: Planets does not publish manuscripts that deal with future missions and instrumentation, nor those that are primarily of an engineering interest. Instrument, calibration or data processing papers may be appropriate for the journal, but only when accompanied by scientific analysis and interpretation that increases understanding of the studied object. A manuscript that describes a new method or technique would be acceptable for JGR: Planets if it contained new and relevant scientific results obtained using the method. Review articles are generally not appropriate for JGR: Planets, but they may be considered if they form an integral part of a special issue.