2024 Ferroan anorthosite nasa

Ferroan anorthosite nasa

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WebThe first anorthosite from Apollo 11 with manifestations of pristinity (10056c) appears to be a normal member of the ferroan group. However, the first pristine ferroan anorthosites from Apollo 14 and 17 to be studied in detail (14312c and 73217c) both have unusually sodic plagioclase by ferroan standards. WebAlibert C., Norman M.D. and McCulloch M.T. (1994) An ancient Sm-Nd age for a ferroan noritic anorthosite clast from lunar breccia 67016. Geochim. Cosmochim. Acta 58, 2921-2926. Apollo 17 Preliminary Examination Team (1973) Apollo 17 Lunar Samples. Science 182, 659-690. Basaltic Volcanism Team (1981) Basaltic Volcanism on the Terrestrial …

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WebOn compositional variations among lunar anorthosites Ferroan anorthosite (FAN) is the most abundant 'pristine' highlands igneous rock in the Apollo sample collection. The presence of substantial FAN in the lunar crust is one argument used in favor of a global magma ocean on which crystallizing plagioclase could float. WebIntroduction:Ferroan Anorthosites (FANs) are considerd to have purportedly crystallized directly from the lunar magma ocean (LMO; e.g., [1]) as a flo- tation crust. LMO modeling suggests that such anor- thosites started to form only after >70% of the LMO had crystallized [2-7]. moving octopus toy

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WebJan 1, 1991 · Eleven splits from the mafic-mineral-rich part of anorthosite 60025 were studied in order to establish the exact nature and causes of compositional variations in the minerals of lunar ferroan anorthosites. All splits were analyzed by INAA, and five were studied intensively by petrologic techniques. All splits were found to have similar … WebFerroan anorthosites are one of the major lunar rock types (Dowty et al. 1974, James 1980) and are thought to be pieces of the original lunar crust formed by plagioclase … WebGlass-coated, high-shocked Anorthosite . 137.7. grams . Figure 1: Photo of 60135. Tick marks are 1 cm. NASA S72-37967. Introduction . 60135 is a glass covered, round object with a coarse-grained, highly shocked cumulate interior (figure 1). The glass coating on one side has been eroded off by micrometeorite bombardment, exposing the interior ... moving odds soccer

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On compositional variations among lunar anorthosites - NASA …

WebThe mineral-chemical data of Dhofar 081 suggest it is FAN (Ferroan anorthosite) in composition (after Warren in Annu. Rev. Earth Planet. Sci. 13:201-240, 1985). Hence, intergrown crystallization of minerals in the present relict igneous clasts and other reported FAN samples argues against a cumulate origin of the lunar anorthosite. moving ocean waves screensaverWebApr 1, 2002 · Sample 67215c is a ferroan anorthosite clast with an age of 4.4 Ga and a positive Nd. The sample has a well preserved microcumulate texture. Relatively rapid cooling rates coupled with preserved pigeonite are consistent with a shallow (<1 km) origin. Additional information is contained in the original extended abstract. moving of cattle to shipping centers

"Webfield of ferroan anorthosite (figure 5). The glass coating attached to this sample has higher REE content than the glass attached to 65315 (figure 6). Lunar Sample Compendium ... Field of view is 1.3 mm. NASA S79-27681. Lunar Sample Compendium C Meyer 2012 . 65325. Aninplagioclase Di Hd . 75 80 85 90 95 . mg-suite ferroan-anorthosite ... " - Ferroan anorthosite nasa

Ferroan anorthosite nasa

WebThe clasts include six granulites and a rare Apollo 17 ferroan anorthosite. This anorthosite possesses elevated incompatible trace element compositions, as does the only other possible sample so far described from the site. The paper discusses three possibilities regarding the petrogenesis of Apollo 17 ferroan anorthosites. Publication: WebNov 1, 1991 · Lunar ferroan anorthosites and mare basalt sources - The mixed connection Global overturn of a hot, gravitationally unstable lunar mantle immediately following the solidification of a magma ocean explains several characteristics of lunar petrology. Lunar mare basalt sources are inferred to be depleted in europium and alumina.

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WebMany are ferroan anorthosite (sensu stricto, i.e., >90 vol% plagioclase), but more mafic rocks that have similar mineral compositions are also common and occur mainly as clasts in feldspathic breccias such as 67015 (Marvin et al., 1987), 67016 (Norman, 1981; Norman et al., 1991; Norman and Taylor, 1992), 67035 (Ryder and Norman, 1979), 67075 … WebFigure 2: Sawn surfaces of 60015, showing glass rind and interior “anorthosite”. NASA S75-21972. Note the . prominant saw marks. Sample on left is about 3 inches across. ... The interior of 60015 is a highly-shocked ferroan anorthosite (~98% plagioclase). Dixon and Papike (1975) pictured relict “triple junction” texture between ...

WebThe rare earth elements (REE) and selected other trace elements were measured in plagioclase and pyroxene from nine samples of the lunar ferroan anorthosite (FAN) … WebMay 31, 2024 · ferroan anorthosite - ancient anorthosites found among the Apollo and lunar meteorite suites feldspar a group of aluminous silicate minerals, with K-, Na- and Ca-bearing end members. Feldspathic highlands terrane (FHT) large terrane on the Moon made primarily of feldspar-rich material Ferroan anorthosite (FAN)

Websuite of lunar plutonic rocks termed ferroan anorthosite (James 1980). Petrography . Dymek et al. (1975) concluded that 62237 was a slowly cooled plutonic lunar rock (figure 1). The mineralogy of 62237 is that of a ferroan anorthosite with fairly abundant (~20%) mafic minerals (figure 5). Warren and Wasson (1977) concluded that 62237 is WebA set of Apollo 17 feldspathic highland clasts from polymict breccia 72275 have been studied. The clasts include six granulites and a rare Apollo 17 ferroan anorthosite (FAN). The composition of these clasts is discussed in detail.

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WebMany are ferroan anorthosite (sensu stricto, i.e., >90 vol% plagioclase), but more mafic rocks that have similar mineral compositions are also common and occur mainly as … moving offersWeb开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 moving-offWebCatalog (1972) provide petrographic information. 65315 is a crushed, ferroan anorthosite . with relict plagioclase grains (An. 97) up to 4 mm long (Fig. 2). Pyroxene is the only mafic silicate present and is concentrated as small, discrete grains interstitial to the larger plagioclases. A few original plagioclase- pyroxene grain boundaries ... moving octopusWebResults of elemental analyses, performed either by instrumental neutron activation analysis (NAA) or radiochemical NAA, of 19 lunar rock samples obtained by the Apollo 15, 17, and 12 missions are presented. Two of the samples are most extraordinary: 'large' (1 g) felsite from Apollo 12 and a pristine ferroan anorthosite from Apollo 15. The felsite is mainly a … moving office 2019 to a new computerWebThe ferroan anorthosite suite consists almost exclusively of the rock anorthosite (>90% calcic plagioclase) ... In the 1960s, NASA researcher John A. O'Keefe and others linked … moving officeWebAug 12, 2013 · Three of them are alkali anorthosites rich in Ca-phosphate (whitlockite), which apparently crystallized from magmas with REE contents roughly 6 x those of high-K KREEP. The alkali anorthosites probably formed from Mg-rich magmas that assimilated large amounts of urKREEP, but some might have formed by metasomatism of ferroan … moving off behind a parked carWebMar 16, 2016 · According to Lunar Magma Ocean (LMO) theory, lunar samples that fall into the ferroan anorthosite (FAN) category represent the only samples we have of of the … moving offers for relocating buyers