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首页> 外文期刊>Journal of Volcanology and Geothermal Research >New evidence for a magmatic influence on the origin of Valles Marineris, Mars
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New evidence for a magmatic influence on the origin of Valles Marineris, Mars

机译：岩浆对火星谷Valles Marineris起源的新证据

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摘要

In this paper, we show that the complex geological evolution of Valles Marineris, Mars, has been highly influenced by the manifestation of magmatism (e.g., possible plume activity). This is based on a diversity of evidence, reported here, for the central part, Melas Chasma, and nearby regions, including uplift, loss of huge volumes of material, flexure, volcanism, and possible hydrothermal and endogenic-induced outflow channel activity. Observations include: (1) the identification of a new >50 km-diameter caldera/vent-like feature on the southwest flank of Melas, which is spatially associated with a previously identified center of tectonic activity using Viking data; (2) a prominent topographic rise at the central part of Valles Marineris, which includes Melas Chasma, interpreted to mark an uplift, consistent with faults that are radial and concentric about it; (3) HiRISE-identified landforms along the floor of the southeast part of Melas Chasma that are interpreted to reveal a volcanic field; (4) CRISM identification of sulfate-rich outcrops, which could be indicative of hydrothermal deposits; (5) GRS K/Th signature interpreted as water-magma interactions and/ or variations in rock composition; and (6) geophysical evidence that may indicate partial compensation of the canyon and/or higher density intrusives beneath it. Long-term magma, tectonic, and water interactions (Late Noachian into the Amazonian), albeit intermittent, point to an elevated life potential, and thus Valles Marineris is considered a prime target for future life detection missions.
机译：在本文中，我们表明火星谷Valles Marineris的复杂地质演化受到岩浆作用表现形式（例如可能的羽流活动）的高度影响。这是基于这里报道的中部Melas Chasma及其附近地区的各种证据，包括隆起，大量材料的损失，弯曲，火山作用以及可能由热液和内生引起的流出通道活动。观测结果包括：（1）在维拉斯（Melas）西南侧面鉴定出直径> 50 km的破火山口/通风口状新特征，该特征在空间上与先前利用维京数据确定的构造活动中心有关； （2）Valles Marineris中部的显着地形上升，包括Melas Chasma，被解释为标志着隆升，与径向和同心的断层一致； （3）沿Melas Chasma东南部底部由HiRISE识别的地貌，被解释为揭示了一个火山场； （4）CRISM识别富含硫酸盐的露头，这可能表明有热液沉积； （5）GRS K / Th特征被解释为水与岩浆的相互作用和/或岩石成分的变化； （6）地球物理证据，可能表明对峡谷和/或其下方较高密度的侵入物进行了部分补偿。长期的岩浆，构造和水相互作用（晚至亚马逊河之间是间歇性的）表明生活潜力提高，因此，Valles Marineris被认为是未来生命探测任务的主要目标。

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    James M. Dohm; Jean-Pierre Williams; Robert C. Anderson; Javier Ruiz; Patrick C. McGuire; Goro Komatsu; Alfonso F. Davila; Justin C. Ferris; Dirk Schulze-Makuch; Victor R. Baker; William V. Boynton; Alberto G. Fairen; Trent M. Hare; Hirdy Miyamoto; Kennth L Tanaka; Shawn J. Wheelock;

  • 作者单位

    Department of Hydrology and Water Resources, University of Arizona, Tucson, AZ85721, USA Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, 85721, USA;

    Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA;

    Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA Jet Propulsion Laboratory, Pasadena, CA, 91109, USA;

    Centra de Biologia Molecular, CSIC-Universidad Autonoma de Madrid, 28049 Cantoblanco, Madrid, Spain;

    McDonnell Center for the Space Sciences, Department of Earth and Planetary Sciences, Washington University, St. Louis, 63130, USA McDonnell Center for the Space Sciences, Department of Physics, Washington University, St. Louis, 63130, USA;

    International Research School of Planetary Sciences, Universita d'Annunzio, 65421 Pescara, Italy;

    Space Sciences and Astrobiology Division, NASA Ames Research Center, Moffett Field, CA 94035, USA;

    U.S. Geological Survey, Sacramento, California, 95819, USA;

    School of Earth and Environmental Sciences, Washington State University, Pullman, WA, 99164, USA;

    Department of Hydrology and Water Resources, University of Arizona, Tucson, AZ85721, USA Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, 85721, USA;

    Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, 85721, USA;

    Space Sciences and Astrobiology Division, NASA Ames Research Center, Moffett Field, CA 94035, USA;

    U.S. Geological Survey, Flagstaff, Arizona, 86001, USA;

    University Museum, University of Tokyo, Tokyo 113-0033, Japan;

    U.S. Geological Survey, Flagstaff, Arizona, 86001, USA;

    Department of Hydrology and Water Resources, University of Arizona, Tucson, AZ85721, USA;

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  • 正文语种 eng
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  • 关键词

    mars; valles marineris; tharsis; plume; superplume; magma; water; canyon system; life;

    机译：火星;瓦莱里纳里斯;ar羽;超级岩浆;水;峡谷系统生活;

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