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During the planning period for sols 5029–5035, NASA’s Curiosity rover wrapped up CheMin analysis of a sample from the Basque Lakes drill hole and prepared it for analysis by SAM. SAM’s next step depends on results from a tunable laser spectrometer run; the team was also collecting images, chemistry readings and environmental data.
NASA’s Curiosity rover spent its sols 5029–5035 plan completing CheMin analysis of a sample drilled from the “Basque Lakes” target and preparing it for analysis by the Sample Analysis at Mars instrument, or SAM. The laboratory work could lead to a separate mass spectrometry analysis, but the team said that decision depends on results from a tunable laser spectrometer measurement of volatiles.
The science plan centered on a sequence of measurements inside the rover. The team was wrapping up CheMin’s analysis of material from the Basque Lakes drill hole while preparing SAM to examine the sample. According to the report by Michelle Minitti, MAHLI Deputy Principal Investigator, CheMin’s data informed SAM’s decision to analyze the sample. SAM was then scheduled to use its tunable laser spectrometer, or TLS, to measure volatiles present in the material.
The TLS results were expected to inform whether SAM would conduct a separate mass spectrometry analysis the following week. The report did not give the results of the TLS run or say whether that additional analysis had been approved. The sequence shows how measurements from one instrument can help guide whether the rover’s laboratory carries out further work on the same drilled sample.
Laboratory activities draw a significant share of Curiosity’s daily power budget, the report said. As a result, much of the other science payload took a back seat during the drill campaign. With the power available, the team still collected observations to document the sample’s surroundings, measure chemistry across workspace materials and continue routine monitoring of the Martian environment.
How the Sample Guides SAM
The week’s central development was the movement of one drilled sample through two rover laboratories. CheMin’s analysis helped SAM decide to examine the Basque Lakes material, and SAM’s TLS measurement was set to guide a further decision about mass spectrometry. That makes the plan more than a single instrument reading: the next step depended on what the current analysis found.
The trade-off is operational as well as scientific. Curiosity has limited daily power, and the report says laboratory work uses a significant portion of it. During this campaign, that meant fewer opportunities for other payload activities. The team nevertheless retained selected imaging, chemistry and environmental observations, balancing close study of the sample with information about the terrain and conditions around the rover.
The report describes the work and planned measurements, but it does not disclose a scientific result about the sample’s composition or what the results may imply about Mars. The value of this update is the analysis sequence and pending decision, rather than a conclusion about the sample.
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From Drill Hole to Laboratory
Curiosity’s routine plans commonly combine observations and measurements from several instruments. The report describes Mastcam and ChemCam mosaics and imaging, chemistry analyses by ChemCam and APXS, images from MAHLI and MARDI, and systematic measurements from REMS, RAD and DAN. Drilling enables the rover to send collected rock material to CheMin and SAM for laboratory analysis.
For this plan, the rover had already drilled the Basque Lakes hole, and CheMin analysis was nearing completion. The team used that information to determine that SAM would analyze the material. The report, written by Michelle Minitti, lists an Earth planning date of Friday, Oct. 1, 2026, and NASA published it on Oct. 5. The sols in the title refer to the rover’s planned period, numbered 5029 through 5035.
Other observations were selected to put the sample in its geologic setting. Mastcam acquired a 360-degree mosaic around the rover, using its color and higher resolution relative to Navcam to inform later imaging requests. The team also scheduled seven photometry observations at fixed times of day. These observations track changes in targets’ spectral characteristics as the Sun angle changes, which can help with interpretation of rover and orbital images.
“The CheMin data were key to SAM deciding to analyze the sample at all.”
— Michelle Minitti, MAHLI Deputy Principal Investigator
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TLS Results Set the Next Step
The report does not state what the TLS measurement found, what volatile compounds were detected, or whether SAM’s team decided to proceed with mass spectrometry. It says the follow-up decision would depend on the TLS results and describes it as a possible analysis for the next week. The sample’s measured findings and SAM’s decision were not yet included in this update.
The report also does not identify the loose gray clasts called “Wooley” and “Fireside”; it describes their origin as unknown. It gives no photometry results, detailed chemistry readings, or conclusions from the environmental monitoring. Those observations were part of the plan, but the update focuses on activities rather than reporting their outcomes.
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SAM Awaits the Volatile Reading
The next reported step was for SAM to receive the TLS measurement results and use them to decide whether to conduct a separate mass spectrometry analysis. If the team proceeded, that analysis was anticipated for the following week, according to the Oct. 5 report. The source does not confirm that it took place, so its completion and findings remain unreported here.
Curiosity’s other planned work included continued environmental monitoring with REMS, RAD and DAN, along with camera observations of atmospheric dust, clouds and dust devils. Further reporting would be needed to establish the TLS result, the decision on mass spectrometry, and any scientific interpretation of the Basque Lakes sample.
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Key Questions
What was Curiosity analyzing?
The rover was analyzing a drilled rock sample from the Basque Lakes drill hole. CheMin analysis was being wrapped up, and the sample was prepared for SAM.
What does the SAM tunable laser spectrometer measure?
In this plan, the TLS measurement was described as measuring volatiles present in the sample. Its results were expected to inform whether SAM would carry out a separate mass spectrometry analysis.
Did SAM conduct the follow-up mass spectrometry analysis?
The report does not confirm that it did. It says SAM would wait for the TLS results before deciding whether to conduct the possible follow-up the next week.
What other work did Curiosity do during the plan?
The rover collected a 360-degree Mastcam mosaic, planned seven photometry observations, took targeted images and gathered chemistry data from materials in the workspace. It also continued environmental monitoring for conditions including dust, clouds and dust-devil activity.
Source: primary
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