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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
Dec 9, 2022 · Nature Communications - Ancient (~3.9 Ga) KREEP-free basalts were sourced from a relatively cool and shallow pyroxene-rich mantle distinct from later-erupted (<3.8 Ga) KREEP-bearing...
- Yash Srivastava
Jan 10, 2022 · We suggest that enrichments of ilmenite and KREEP in the nearside hemisphere following the South Pole–Aitken impact event provide a viable explanation for the wide composition range of mare ...
- Nan Zhang
Oct 19, 2021 · Young mare basalts—mainly distributed in a region rich in potassium, rare-earth elements and phosphorus (KREEP) in Oceanus Procellarum, called the Procellarum KREEP Terrane (PKT)4—were thought ...
- Heng-Ci Tian, Hao Wang, Yi Chen, Wei Yang, Qin Zhou, Chi Zhang, Hong-Lei Lin, Chao Huang, Shi-Tou Wu...
- 2021
Apr 27, 2011 · KREEP is an acronym for potassium, rare earths, and phosphorus, elements that are enriched in the last melt of the lunar crust. Learn how KREEP formed, why it is important, and how it relates to the lunar surface features and history.
The Chang'E-5 basalt, the youngest basalt dated on the Moon so far, formed 2.03 billion years ago, originated from a depleted mantle source with a KREEP component less than 0.5% weight percent. In other words, KREEP is “missing” in the origin of the Chang’E-5 basalts. Figure 3.
