Curiosity Blog, Sols 5029-5035: Back In The Lab

TL;DR

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NASA’s Curiosity rover spent its Oct. 1 planning week completing CheMin analysis of a drilled sample from the Basque Lakes site and preparing the sample for analysis by SAM. SAM’s next steps depend on results from its tunable laser spectrometer, while rover teams also collected images, chemistry data and environmental measurements.

NASA’s Curiosity rover spent the week planned for Oct. 1, 2026, analyzing material drilled from the Basque Lakes site, as its CheMin instrument wrapped up work and its SAM laboratory prepared to examine the sample. The results from SAM’s tunable laser spectrometer are expected to inform whether the team carries out a separate mass spectrometry analysis next week.

In a report published Oct. 5, NASA said the CheMin instrument completed analysis of material from the Basque Lakes drill hole. CheMin’s data helped determine whether SAM, the rover’s Sample Analysis at Mars instrument suite, would analyze the sample. SAM then ran its tunable laser spectrometer to measure volatiles present in the material.

The rover team was waiting for those laser spectrometer results before deciding whether to schedule a follow-up mass spectrometry analysis. That next step was not confirmed in the report. The sample’s laboratory work used a substantial share of Curiosity’s daily power budget, limiting other payload activities during the drill campaign, according to NASA.

Available power also supported a 360-degree Mastcam mosaic to document the geology around the drilling location, closer images of structures near the workspace and ChemCam imaging of the Cordillera butte. ChemCam collected chemistry data from the drill hole, sand ripples called French Creek, and loose gray rocks named Wooley and Fireside. The report described the clasts’ origin as unknown.

How Lab Results Guide the Next Test

Curiosity’s laboratory instruments let scientists analyze a drilled Martian rock sample with tools that cannot be used from a distance. In this campaign, CheMin’s findings helped SAM decide to proceed, while the TLS measurement is intended to inform whether the sample merits another kind of analysis. The sequence shows how one instrument’s results can shape the rover team’s next use of limited onboard power.

The decision also affects what the rover can do elsewhere at the site. NASA said laboratory work takes a significant portion of the rover’s daily power budget, so much of the wider payload takes a back seat during drill campaigns. Imaging and chemistry measurements collected alongside the lab work provide geological and compositional context for the sample, but the report did not announce a scientific conclusion about what the sample contains.

From Drill Hole to Rover Laboratory

Curiosity’s routine plans commonly include imagery and chemistry measurements from Mastcam and ChemCam, close-up images from MAHLI, and systematic environmental readings from instruments including REMS, RAD and DAN. A drilling campaign adds a different phase: the rover delivers powdered rock to CheMin and SAM for laboratory analysis.

The Oct. 1 plan followed that pattern. The team used Mastcam and Navcam images to place the Basque Lakes sample in its local setting, then gathered additional measurements from nearby rocks and sand. NASA’s report, written by Michelle Minitti, MAHLI deputy principal investigator, also described seven photometry observations scheduled at different times of day. By tracking how targets’ spectral characteristics change with the Sun’s angle, those observations can help scientists interpret rover images and images from orbit.

The Sample’s Next Analysis Is Pending

NASA’s report did not provide the TLS results or identify which volatile compounds, if any, the instrument measured. It also did not confirm whether SAM would conduct the separate mass spectrometry analysis, which was still under consideration pending those results. No mineralogical or chemical conclusions about the Basque Lakes sample were included in the report.

The report also left the origin of the Wooley and Fireside gray clasts unresolved. Their chemistry was measured, but NASA described their origin as unknown. Further interpretation may depend on additional analysis and observations.

SAM Awaits the TLS Readout

The immediate next step described by NASA is for the team to review results from SAM’s tunable laser spectrometer. Those findings will guide the decision on whether to schedule a mass spectrometry analysis in the following week. The Oct. 5 report did not state when the results would be released or what the team would do if it chose not to run the additional analysis.

Curiosity’s broader work at the site includes continued imaging, chemistry measurements and routine monitoring of the Martian environment. NASA said the rover was tracking atmospheric dust, clouds and dust-devil activity with Navcam and Mastcam, alongside regular measurements from REMS, RAD and DAN.

Key Questions

What did Curiosity analyze during the week?

The rover worked on material from the Basque Lakes drill hole. CheMin completed its analysis, and SAM used its tunable laser spectrometer to measure volatiles in the sample.

Did NASA confirm a mass spectrometry test?

No. The team was waiting for the TLS results before deciding whether to conduct a separate mass spectrometry analysis the following week.

Why did the rover do fewer other science activities?

NASA said the laboratory work used a significant portion of Curiosity’s daily power budget. The rover used available power for contextual imaging, chemistry measurements and environmental monitoring.

What other observations did Curiosity make?

Mastcam captured a 360-degree mosaic and images of nearby structures; ChemCam measured the drill hole, sand ripples and loose rocks. The rover also monitored dust, clouds and dust-devil activity.

Source: primary