Ferroan anorthosite nasa

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August undefined, 2024

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. 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 ...

INTERPRETATION OF FERROAN ANORTHOSITE AGES AND …

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 … WebMay 25, 1993 · The presence of heterogeneous, bimodal, and/or trimodal pyroxene compositions suggests that some of the anorthosites are polymict rocks; however, they … brickley sears \u0026 sorett boston

Lunar ferroan anorthosite petrogenesis: clues from trace element ...

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. 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 … 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 brickley sears \u0026 sorett

Highland materials at Apollo 17 - Contributions from 72275 - NASA ...

65325 – 66.9 grams 65327 - NASA

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. 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. covid food dietWebJan 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 … covid food handling course qld

"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 … " - Ferroan anorthosite nasa

Ferroan anorthosite nasa

Lunar ferroan anorthosite petrogenesis: clues from trace element ...

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 … WebMay 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) …

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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- 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.

WebThe 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 …

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 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 ...

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 ...

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 … brickleys gymWebsuite 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 brickleys eastbourneWebThe 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. covid flyers for schoolsWebThe rare earth elements (REE) and selected other trace elements were measured in plagioclase and pyroxene from nine samples of the lunar ferroan anorthosite (FAN) … covid follow up testing cdcWebIntroduction: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]. brickleys homes for rentWebAug 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 … brickley smith \\u0026 zimmerman 2009WebCatalog (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 ... brickley smith \u0026 zimmerman 2009