好奇号完成第48次火星钻探:Basque Lakes样本寻“矿物金矿”

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NASA 好奇号火星车近日在盖尔陨石坑内完成了其第 48 次岩石钻探作业,目标被命名为“Basque Lakes”。这标志着这台已在火星表面运行 14 年的老将,在其 38 公里的长途跋涉中又一次进入全新的科学探索区域——Cache Creek 方格区。项目团队正热切等待 CheMin X 射线衍射仪的分析结果,期望从这份样本中“淘”出揭示火星古老地质历史的“矿物金矿”。

地名背后的地质密码

在好奇号着陆之前,科学家们就将计划探索的盖尔陨石坑区域划分为多个矩形方格,并以地球上具有显著地质特征的小镇命名。好奇号早已越过着陆前规划的方格,进入以加拿大不列颠哥伦比亚省 Cache Creek 地区命名的新区域。这片加拿大区域以地质多样性著称,出露有洋壳、海洋沉积物、火山岩和冰川沉积物,同时还拥有化学性质独特的湖泊——这些湖泊可能与火星上曾经存在的湖泊环境存在类比关系。

Cache Creek 地区还位于 19 世纪 60 年代淘金小径的南端,当年大批矿工和探矿者涌入这片区域寻找财富。团队以“Cashing in at Cache Creek”为本周博客标题,正是借用了这段淘金历史的双关寓意。当然,好奇号寻找的不是真金白银,而是能够解码火星沉积与蚀变历史的矿物组合。

【关键数据】

- 钻探目标总数: 48 个(Basque Lakes 为盖尔陨石坑第 48 个钻探目标)

- 累计行驶里程: 38 公里(约 24.6 英里)

- 海拔爬升: 超过 1 公里

- 任务时长: 约 14 年(已运行超 5000 个火星日)

好奇号 Basque Lakes 钻探点 MAHLI 图像

多仪器协同的钻前“体检”

钻探并非一蹴而就。作为本周 APXS(阿尔法粒子 X 射线光谱仪)上行链路负责人和战略规划者,加拿大新不伦瑞克大学高级研究科学家 Lucy Thompson 参与规划了对 Basque Lakes 目标的先期接触科学作业。APXS 被放置于岩石目标表面进行化学成分测量,MAHLI 手持透镜成像仪则在 1 厘米距离内对岩石纹理进行精细观测,ChemCam 则发射激光进一步表征目标成分。

在工程师完成预加载稳定性测试后,MAHLI 还对目标进行了成像确认。所有这些仪器的联合观测结果,共同支撑了团队“是否继续钻探”的关键决策。这种多仪器交叉验证的工作流程,正是好奇号 14 年来持续产出高质量科学成果的方法论基础。

电力约束下的科学编排

尽管面临钻探及配套分析带来的显著电力约束,加之火星车本身的老化问题,团队仍在一周计划中安排了丰富的附加活动:Mastcam 对周围地形成像,为新钻探样本提供背景参照;ChemCam 分析了附近另一处基岩目标“Peace River”,并利用成像和被动光谱能力观测新钻孔及周围岩屑;ChemCam 远程成像还被用于考察附近山丘“Cordillera”底部一处外观杂乱的块状沉积物。Navcam 和 Mastcam 则持续监测盖尔陨石坑内的环境与大气状况。

按照计划,Basque Lakes 钻探样本的分析将于下周继续,届时样本将交付 SAM(样本分析仪器),进一步揭示这处岩石样本的历史信息。好奇号预计将在当前位置再停留一周左右,随后倾倒样本、启程继续对夏普山和盖尔陨石坑的探索。对于这台超期服役十余年的火星车而言,每一次钻探都弥足珍贵——而 Cache Creek 方格区究竟能否“淘”到足以改写火星水环境认知的矿物证据,答案或许很快揭晓。


出处:Curiosity Blog, Sols 5022-5028: Cashing in at Cache Creek

英文原文
Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Perseverance Rover Mars Curiosity Rover Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Mars Home 3 min read Curiosity Blog, Sols 5022-5028: Cashing in at Cache Creek NASA’s Mars rover Curiosity acquired this image of the “Basque Lakes” drill site after the pre-load test, using its Mars Hand Lens Imager (MAHLI), a close-up camera located on the turret at the end of the rover’s robotic arm. Curiosity acquired the image on Sept. 23, 2026 — Sol 5023, or Martian day 5,023 of the Mars Science Laboratory Mission — at 03:56:10 UTC. NASA/JPL-Caltech/MSSS Written by Lucy Thompson, Senior Research Scientist, University of New Brunswick, Canada Earth planning date: Friday, Sept. 25, 2026 Before we landed, the area of Gale crater that we planned to explore was divided up into rectangular parcels with designated names. The names were chosen after small towns associated with significant geological features. Our selected targets (mesas, bedrock, soil, boulders, etc.) within those quads were then given unofficial names based on the theme of the quad. See the link here for more details on naming conventions on Mars. Curiosity has long since climbed above the quads that were selected before landing, and before her 14-year, 38-kilometer (24.6-mile) trek, which included more than 1 kilometer (0.6 miles) of elevation gain. We recently entered the new Cache Creek quad, named after an area of geological diversity in British Columbia, Canada. The area in Canada includes exposures of oceanic crust, marine sediments, volcanic rocks, and glacial deposits, as well as being home to lakes with unusual chemistry that may be analogous to lakes that once existed on Mars. It also lies at the southern end of the 1860s Gold Rush Trail, where miners and prospectors flocked to this part of British Columbia in search of riches. This week we successfully drilled into our 48th rock target in Gale crater (“Basque Lakes”), from the Cache Creek quad. While we may not literally strike gold, we are all eagerly anticipating the outcome of the CheMin X-ray diffraction analysis of our drilled sample that will take place in this weekend plan. What gold mine of minerals will the sample contain? What can they tell us about the depositional and alteration history of this rock exposure — might there be similar minerals present as those associated with some of the lakes in the Cache Creek area of British Columbia? As an APXS uplink lead and strategic planner this week I helped to plan the triage contact science on the potential Basque Lakes drill target and communicate the results to the rest of the team. We placed APXS in contact with the rock target to measure its chemistry, and the MAHLI camera to within 1 centimeter (about 0.4 inches) to examine in detail the textures . ChemCam also fired its laser at the Basque Lakes drill target to further characterize composition. MAHLI also imaged the target after the engineers checked the stability of the rock with a pre-load test . The results from all these activities helped to determine whether to proceed with drilling. Despite significant power constraints associated with drilling and the accompanying analyses, as well as an aging rover, we were also able to plan additional activities. Mastcam imaged the surrounding terrain to provide context for our new drill sample. ChemCam was able to analyze the chemistry of another nearby bedrock target, “Peace River,” and use its imaging and passive spectroscopic capabilities to look at the new drill hole and surrounding tailings. ChemCam remote imaging was also used to examine an interesting-looking deposit of jumbled blocks at the base of a nearby butte, “Cordillera.” We also utilized Navcam and Mastcam imaging in the continued monitoring of environmental and atmospheric conditions in Gale crater. Analysis of the Basque Lakes drill sample should continue next week with delivery of material to SAM, which will reveal more nuggets of information regarding the history of this particular rock sample. Curiosity will likely be at this location for another week, before we dump the sample and drive away to continue our exploration of Mount Sharp and Gale crater. Want to read more posts from the Curiosity team? Visit Mission Updates Want to learn more about Curiosity’s science instruments? Visit the Science Instruments page NASA’s Curiosity rover at the base of Mount Sharp NASA/JPL-Caltech/MSSS Share Details Last Updated Oct 04, 2026 Related Terms Blogs Explore More 3 min read Curiosity Blog, Sols 5016–5021: Fantastic Minerals and How To Detect Them Article 4 days ago 3 min read Mars Has Its Charmes Article 6 days ago 3 min read Curiosity Blog, Sols 5010-5015: Checking out the Bands Article 2 weeks ago Keep Exploring

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