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KREEP, an acronym built from the letters K (the atomic symbol for potassium), REE (rare-earth elements) and P (for phosphorus), is a geochemical component of some lunar impact breccia and basaltic rocks.
KREEP, a suite of lunar lavas, relatively enriched in certain elements, that were identified in the analysis of rock samples that Apollo astronauts brought back from the Moon. The elements include potassium (chemical symbol K), rare-earth elements, and phosphorus (P), from which the acronym KREEP.
- James D. Burke
KREEP was identified in the analysis of some rock samples that the Apollo astronauts brought back from the moon, and it is a moon rock that contains—well—potassium, rare-earth elements, and phosphorus.
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What is KREEP, and why is it important on the Moon? The simple definition is that KREEP is an acronym for potassium (chemical symbol K), rare earth elements (the ones that are always cut out of the periodic table and drawn in two separate rows of their own, abbreviated REE), and phosphorus (chemical symbol P).
Overview. KREEP. Quick Reference. Crystalline rock from the highlands of the Moon, enriched in potassium (chemical symbol K), rare earth elements (abbr. REE), and phosphorus (chemical symbol P). The presence of KREEP rocks suggests that chemical separation has occurred within the Moon.
Nov 11, 2004 · The ages of KREEP-rich samples are, however, confined to the earliest periods of lunar magmatism between 3.8 and 4.6 billion years (Gyr) ago8,9, providing no physical evidence that KREEP is ...
