"Elemental composition" refers to the types and amounts of elements that make up a substance or material. It describes what the substance is composed of at the most basic level. Full definition
Johns Hopkins Applied Physics Laboratory in Laurel, Maryland: «Planetary Object Geophysical Observer (POGO),» a secondary payload that is a hopper to be dropped on the asteroid surface by the Asteroid Retrieval Vehicle to measure elemental composition of asteroid regolith at multiple locations. (sciencedaily.com)
«We applied a new technique called X-ray fluorescence microscopy — it looks at elemental composition,» said Marshall. (sciencedaily.com)
Like ChemCam, SuperCam will use Laser - Induced Breakdown Spectroscopy (LIBS), which can determine a target's elemental composition from over six metres away. (scientificamerican.com)