Mapping terrestrial analogs for martian samples

Internships at Brookhaven’s National Synchrotron Light Source II helped turn her love for rocks into serious study.

Catherine Trewhella, a recent graduate from the University of Massachusetts, Amherst, and current intern at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory, is taking a microscopic look at rocks at the National Synchrotron Light Source II (NSLS-II), a DOE Office of Science user facility. Her research will help prepare scientists for analyzing samples brought back from outer space, specifically Mars.
Trewhella is currently interning as a part of Brookhaven Lab’s Office of Educational Programs’ Supplemental Undergraduate Research Program (SURP). Over the course of the fall, she has been using NSLS-II’s Submicron Resolution X-ray Spectroscopy (SRX) beamline to map out the chemical make-up of terrestrial analogs for Martian samples.
“They’re terrestrial rocks,” she said. “But what makes them worth the closer look is researchers believe they’re similar to rock formations expected on Mars.” These x-ray fluorescence images (XRF) will therefore help scientists better understand what they are seeing when studying Martian samples.

>Read more on the National Synchrotron Light Source II (NSLS-II) website

Image: Catherine Trewhella at the Submicron Resolution X-ray Spectroscopy (SRX) beamline at the National Synchrotron Light Source II (NSLS-II) at Brookhaven Lab.

From Moon Rocks to Space Dust

Specialized equipment, techniques, and expertise at Berkeley Lab attract samples from far, far away.

From moon rocks to meteorites, and from space dust to a dinosaur-destroying impact, the Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) has a well-storied expertise in exploring samples of extraterrestrial origin.

This research – which has helped us to understand the makeup and origins of objects within and beyond our solar system – stems from the Lab’s long-standing core capabilities and credentials in structural and chemical analyses and measurement at the microscale and nanoscale.

Berkeley Lab’s participation in a new study, detailed June 11 in the journal Proceedings of the National Academy of Sciences, focused on the chemical composition of tiny glassy grains of interplanetary particles – likely deposited in Earth’s upper atmosphere by comets – that contain dust leftover from the formative period of our solar system.

That study involved experiments at the Lab’s Molecular Foundry, a nanoscale research facility, and the Advanced Light Source (ALS), which supplies different types of light, from infrared light to X-rays, for dozens of simultaneous experiments.

> Read more on the Advanced Light Source website

Image: Moon dust and rock samples photographed at Berkeley Lab.
Credit: Berkeley Lab