| 释义 |
KREEP|kriːp|
[f. K, chem. symbol for potassium + REE, abbrev. for rare-earth element + P, chem. symbol for phosphorus (in allusion to its unusual composition).]
A substance found on the moon as glassy fragments and as a constituent of fines and breccias, characterized by a high content of potassium, phosphorus, and rare-earth elements and unusually little iron.
1971Sci. News Let. 23 Jan. 62 Another Apollo 12 find..was that of an exotic component called KREEP by some—for high content of potassium, rare earth elements and phosphorus—found in rock 13. 1971N. J. Hubbard et al. in Earth & Planetary Sci. Lett. X. 343/1 We will refer to this distinctive glass as KREEP glass (from its distinctive potassium, rare-earth element, and phosphorus content). 1971Geochim. & Cosmochim. Acta Suppl. 2 I. 393 Hubbard et al. (1971a) designated this class of material as the KREEP component. Ibid. 398 Breccias with glass matrices..are the most abundant form of KREEP in the soil samples. 1973McGraw-Hill Yearbk. Sci. & Technol. 284/2 The activity fell off smoothly in the adjacent regions to the east and west, including the other near-side maria... The localization of the high U-Th regions indicates a restricted distribution of KREEP (a potassium, rare-earth, phosphate-bearing phase), with which the high U-Th component is associated in returned lunar samples. |