[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/all2en\/wiki32\/kreep-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/all2en\/wiki32\/kreep-wikipedia\/","headline":"Kreep \u2014 Wikipedia","name":"Kreep \u2014 Wikipedia","description":"before-content-x4 A wikipedia article, free l’encyclop\u00e9i. after-content-x4 Crept , acronym built from letters K (the atomic symbol for potassium), REE","datePublished":"2021-12-27","dateModified":"2021-12-27","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/all2en\/wiki32\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/all2en\/wiki32\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/4\/43\/FormationLune.svg\/220px-FormationLune.svg.png","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/4\/43\/FormationLune.svg\/220px-FormationLune.svg.png","height":"115","width":"220"},"url":"https:\/\/wiki.edu.vn\/all2en\/wiki32\/kreep-wikipedia\/","wordCount":2133,"articleBody":"     (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4A wikipedia article, free l’encyclop\u00e9i.         (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Crept , acronym built from letters K (the atomic symbol for potassium), REE ( Rare Earth Element – Rare Lands) and P (For phosphorus), is a geochemical component of certain impact, basalts, or melted norites. Its most important characteristic is an increased concentration in so -called “incompatible” elements [ first ] (which concentrate in the liquid phase during the crystallization of magma) and producing heat such as uranium, thorium and potassium [ 2 ] . The canonical composition of Kreep includes 1% (in weight) of potassium oxide and phosphorus, 20-25 ppm of rubidium, and lanthane concentrations which are 300 to 350 times the concentrations found in chondrites [ 3 ] .        (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Indirectly, the origin of the Kreep comes from the formation of the moon, of which it is now commonly accepted that it follows from the impact of an object the size of March which would have struck the earth 4.5 billion ago years [ 4 ] . This impact projected a large quantity of material in circum-terrestrial orbit whose accretion has finally formed the moon [ 5 ] . Given the large amount of energy that has been released by this event, it is estimated that a large part of the moon was initially in fusion, forming an ocean of magma covering the entire surface of the moon. During the crystallization of this magma ocean, minerals like Olivine and Pyroxene would have precipitated and flowed at the bottom of the magma to form the lunar coat. The crystallization having been accomplished approximately to three-quarters, of the arrthositic plagioclase would have started to crystallize, supernatant from the magma because of its low density, and thus forming an anorthositic crust. Thus, the so-called “incompatible” elements (that is to say those which are preferentially concentrated in the liquid phase) would have gradually been concentrated in the magma during its crystallization, forming a magma rich in Kreep, sandwiched between the crust and of the coat. This scenario is confirmed by the very anorthositic composition of the crust of the lunar highlands, as well as the abundance on the moon of materials rich in kreep [ 6 ] . Before the Lunar Prospector mission, it was thought that the materials rich in Kreep formed a layer under the crust occupying the entire lunar surface. However, the results of the gamma rays spectrometer on this mission show that the rocks containing Kreep are mainly concentrated in the regions of Oceanus Procedure and Mare Imbrium, called the Kreep Terrane (PKT) Procedure. The ejectas of the basins far from these regions, which contain deep layer materials (and possibly the coat) (like the Mare Crisium, the Eastern pond, and the South-Aitken poin basin) do not contain notable concentrations of Kreep.        (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4In the kreep procellarum terrane, the heat produced by this concentration within the crust (and\/or the mantle) is almost certainly responsible for the longevity and the intensity of the volcanism on the visible face of the moon [ 7 ] . \u2191 (in)  G. Jeffrey Taylor , ‘ A New Moon for the Twenty-First Century \u00bb , Planetary Science Research Discoveries, August 31, 2000  \u2191 (in) C. K. Charles Shearer and 15 coauthors , ‘ Thermal and magmatic evolution of the Moon \u00bb , GeoScienceWorld , Mineralogical Society of America Mineralogical Society of America , vol. 60, n O 1, 2006 , p. 365\u2013518 (DOI\u00a0 10.2138\/rmg.2006.60.4, read online )  \u2191 C. R. Neal, and L. A. Taylor, “K-Frac + REEP-Frac”: A New Understanding of KREEP in Terms of Granite and Phosphate Petrogenesis, Abstracts of the Lunar and Planetary Science Conference , volume 19, page 831 (1988)  \u2191 (in) AND. Belbruno and J. Richard Gott III , ‘ Where Did The Moon Come From? \u00bb , The Astronomical Journal , vol. 129, n O 3, 2005 , p. 1724\u20131745 (DOI\u00a0 10.1086\/427539, Bibcode\u00a0 2005AJ….129.1724B, arXiv\u00a0 astro-ph\/0405372)  \u2191 (in)  G. Jeffrey Taylor , ‘ Gamma Rays, Meteorites, Lunar Samples, and the Composition of the Moon \u00bb , Planetary Science Research Discoveries, November 22, 2005 (consulted the August 11, 2009 )  \u2191 (in) M. A. Mark Wieczorek and 15 Coauthors , ‘ The constitution and structure of the lunar interior \u00bb , GeoScienceWorld , Mineralogical Society of America Mineralogical Society of America , vol. 60, n O 1, 2006 , p. 221\u2013364 (DOI\u00a0 10.2138\/rmg.2006.60.3, read online , consulted the August 11, 2009 )  \u2191 (in) Bradley Jolliff , Jeffrey Gillis , Larry Haskin , Randy Korotev and Mark Evening , ‘ Major lunar crustal terranes: Surface expressions and crust-mantle origins \u00bb , Journal of Geophysical Research , 2000 , p. 4197\u20134216 (DOI\u00a0 10.1029\/1999JE001103, read online , consulted the August 11, 2009 )         (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/all2en\/wiki32\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/all2en\/wiki32\/kreep-wikipedia\/#breadcrumbitem","name":"Kreep \u2014 Wikipedia"}}]}]