Ferroan anorthosite nasa

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August undefined, 2024

WebResults 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 … WebApollo 16 sample 62236 is classified as a ferroan noritic anorthosite, despite the fact that it has both noritic and troctolitic biases depending on the thin sec-tion viewed [11, 12]. Warren and Wasson [11] con-cluded that 62236 is pristine, and Nord and Wandless [12] argue that 62236 is a monomict breccia. How-

Lunar ferroan anorthosite 60025 - Petrology and chemistry of ... - NASA

Web开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 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 … bus x12

62237 - NASA

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 … 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 WebFERROAN ANORTHOSITES Ferroan anorthosites are rare at the Apollo 14 site. Only one clast of ferroan anorthosite has been characterized chemically and petrographically [6]. This clast is a monomict cataclasite which consists of nearly 100% plagioclase (An95.5) with relict grains up to 1.3 mm across. Olivine (Fo69) is the only marie phase. ccms report a change

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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 … 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) ccms sebra teleperformanceWebFerroan 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 … bus x03

"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 … " - Ferroan anorthosite nasa

Ferroan anorthosite nasa

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 ... WebApr 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.

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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]. 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.

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. WebMay 25, 1993 · The presence of heterogeneous, bimodal, and/or trimodal pyroxene compositions suggests that some of the anorthosites are polymict rocks; however, they …

Web15415 is classified as a ferroan anorthosite based on the calcic composition of the plagioclase and Fe-rich composition of the low-Ca pyroxene (figure 4). The mineralogical … WebMar 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 …

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.

WebJan 1, 2002 · Lunar ferroan anorthosites (FANs) are relics of an ancient, primary feldspathic crust that is widely believed to have crystallized from a global magma ocean. Compositions and ages of FANs provide fundamental information about the origin and magmatic evolution of the Moon, while the petrology and thermal history of lunar FANs illustrate the structure … bus x1 oxfordWebfield 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 ... bus x17 coventryWebNov 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. ccms resortsWebMay 31, 2024 · NASA Astromaterials Curation, an integral part of any sample return mission, comprises preparation and allocation of samples for research and education, initial characterization of new samples, and secure storage for the benefit of future generations. ... Ferroan anorthosite (a) 4294± 58 : Sm/Nd : 67215 : Ferroan noritic anorthosite (c) … ccms resorts applicationWebThe 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: bus x17 matlockWeb开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 bus x170WebThe rare earth elements (REE) and selected other trace elements were measured in plagioclase and pyroxene from nine samples of the lunar ferroan anorthosite (FAN) … bus x17