Earth rocks assist hone methods for future Mars samples

In 2024, NASA’s Mars rover Perseverance collected an uncommon rock pattern. The rock, named Sapphire Canyon, options white, leopardlike spots with black borders inside a crimson mudstone and would possibly maintain clues about sources of natural molecules inside Mars.

Right here on Earth, in Overview of Scientific Devices, researchers from Jet Propulsion Laboratory and the California Institute of Expertise used a method known as optical photothermal infrared spectroscopy (O-PTIR) to review a visually related rock. They wished to find out if O-PTIR might be utilized to the Sapphire Canyon pattern when it’s ultimately introduced right here for examine.

O-PTIR makes use of two lasers to review a fabric: the primary heats up the fabric and causes small thermal vibrations on its floor proportional to the laser’s wavelength, and the second measures the extent of those adjustments. Collectively, this creates the fabric’s distinctive chemical fingerprint.

The researchers examined O-PTIR on a basalt rock with darkish inclusions of comparable dimension to the Sapphire Canyon pattern’s—which, in distinction to Perseverance’s refined pattern choice course of, writer Nicholas Heinz discovered purely by coincidence.

“I used to be mountaineering in Arizona, in Sedona, after I noticed this rock that simply did not seem like it belonged,” he stated. “I put it in my backpack and introduced it again to have a look at.”

They aimed to see if O-PTIR might differentiate between the rock’s main materials and its darkish inclusions and located it was extraordinarily efficient due to the improved spatial decision of O-PTIR. Furthermore, O-PTIR is a speedy method.

Every spectrum might be collected in minutes, permitting scientists to go in with a extra delicate method to review potential areas of curiosity recognized in additional element, comparable to areas containing organics.

“I hope this functionality will likely be thought-about for any future materials returned from Mars, an asteroid, or every other planetary floor,” stated Heinz.

The workforce’s O-PTIR capabilities are the one of their variety obtainable at NASA’s Jet Propulsion Laboratory and have already been utilized by different NASA missions—in 2024, they helped affirm the cleanliness of Europa Clipper, a mission to review one in all Jupiter’s moons, previous to its launch.

Heinz stated that now that they’ve proven its extra advantages in functions associated to Mars samples, and geology extra broadly, they’re working with NASA’s Mars science workforce to check the algal microfossils sometimes used as Mars analogs for the rovers.