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火星表面富含硫,但此前确认的硫大多与氧或金属结合,存在于硫酸盐、硫化物等矿物中。首次确认由单质硫组成的原位地质沉积,揭示了此前未被火星探测直接证实的硫储库和富集路径,为重建古火星地下流体活动及其环境演化提供了新线索。2026年8月20日,相关研究成果发表于《Science》。

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(图片来源:美国国家航空航天局(NASA)/喷气推进实验室官网)

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科技导报 | 科技新闻 2026,44(16): 4-4
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科技导报 |科技新闻 2026 , 44 (16) : 4 -4
“好奇号”在火星峡谷发现单质硫沉积
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    出版时间: 2026-08-28
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    火星表面富含硫,但此前确认的硫大多与氧或金属结合,存在于硫酸盐、硫化物等矿物中。首次确认由单质硫组成的原位地质沉积,揭示了此前未被火星探测直接证实的硫储库和富集路径,为重建古火星地下流体活动及其环境演化提供了新线索。2026年8月20日,相关研究成果发表于《Science》。

    . “好奇号”在火星峡谷发现单质硫沉积. 科技导报, 2026 , 44 (16) : 4 -4 .
    . Science & Technology Review, 2026 , 44 (16) : 4 -4 .
    火星表面富含硫,但此前确认的硫大多与氧或金属结合,存在于硫酸盐、硫化物等矿物中。首次确认由单质硫组成的原位地质沉积,揭示了此前未被火星探测直接证实的硫储库和富集路径,为重建古火星地下流体活动及其环境演化提供了新线索。2026年8月20日,相关研究成果发表于《Science》。
    2024年5月,“好奇号”火星车驶过盖尔陨石坑格迪兹峡谷时,意外轧裂一块浅色石头,露出淡黄色、半透明的内部。圣路易斯华盛顿大学牵头的研究团队随后发现,类似石块散布在约2100 m2的三角形区域内。
    研究人员选取5块代表性石头,利用“好奇号”搭载的阿尔法粒子X射线光谱仪开展10次测量,并结合近景图像和光谱建模分析。排除表面尘埃、沙粒等影响后,结果确认这些石块主要由近乎纯净的零价硫组成,而非火星上常见的硫酸盐。
    这些脆弱石块集中出现在被深切的峡谷内,较少夹杂外来碎屑,也没有经历长距离搬运常见的磨圆和破碎。结合地形与侵蚀关系,研究人员判断,硫沉积很可能在当地形成,随后因峡谷下切而从附近地层中释放出来。
    研究团队提出,古火星地下岩浆释放的含硫气体可能沿裂隙上升,在近地表冰冻圈中冷却,并在水参与下生成单质硫;此后峡谷侵蚀造成压力下降,使硫质材料破碎并出露。这一模型可以解释沉积的高纯度和局部分布,但目前仍是基于地质与化学证据提出的假说。
    单质硫在地球上可参与微生物代谢。未来还需寻找源岩、确定形成年代并发现更多同类露头,才能判断这种硫循环在古火星上是否普遍存在。
    (综合:《Science》、圣路易斯华盛顿大学官网、NASA/喷气推进实验室官网)

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    2种不同金属材料的力学参数
    科
    Family
    属数
    Number of
    genus
    种数
    Number of
    species
    占总种数比例
    Percentage of
    total species (%)
    属
    Genus
    种数
    Number of
    species
    占总种数比例
    Percentage of total
    species (%)
    鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
    小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
    多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
    红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
    小菇属 Mycena 11 5.26
    光柄菇属 Pluteus 5 2.39
    红菇属 Russula 17 8.13
    栓菌属 Trametes 5 2.39
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