Ferroan anorthosite - Wikipedia
Ferroan anorthosite (FAN) is a pristine coarse-grained igneous rock found in the lunar highlands. FANs have a Ca-rich plagioclase (called anorthite) composition greater than 90 wt%, [1] with many consisting of an anorthite-content of 99 wt%. [2] The first hand sample of FAN, Sample 15415, was discovered at the Apollo 15 landing site, Hadley ...
Ferroan anorthosite: A widespread and distinctive lunar rock type
1974年11月1日 · Such ferroan anorthosite is evidently a coherent, distinctive and widespread lunar rock type of cumulate origin which may not necessarily be very closely related genetically to other highland rock types.
Detection of apatite in ferroan anorthosite indicative of a volatile ...
2024年1月15日 · This Article provides evidence for apatite in a ferroan anorthosite clast in a lunar meteorite, allowing direct measurement of the volatile systematics of the primary products of the lunar...
Lunar ferroan anorthosites: Mineralogy, compositional variations, …
Detailed petrologic study of a suite of lunar ferroan anorthosites indicates that their mineral compositional variations are generally consistent with derivation of these anorthosites from a common p...
Ferroan 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 floatation from a moon-wide magma ocean (e.g. Smith et al. 1970, Wood et al. 1970, Warren 1990).
The global distribution of pure anorthosite on the Moon | Nature
2009年9月10日 · The magma ocean hypothesis was proposed on the basis of numerous analyses of lunar samples of ferroan anorthosite 2 (plagioclase-rich rock with minor amounts of mafic silicates that have a...
Unraveling the Components Within Apollo 16 Ferroan Anorthosite …
The ferroan anorthosite suite (FAS) represents the only direct sampling of the lunar magma ocean (LMO) and potentially contains information on the earliest history of the Moon. Apollo 16 FAS sample 60025 is extremely important for understanding early lunar evolution, but unraveling this information is complicated.
Lunar Ferroan Anorthosite Petrogenesis: Clues from Trace …
1998年4月1日 · Central to understanding the lunar highlands is the study of the ferroan anorthosite (FAN) suite of rocks, which are considered relics of the Moon’s earliest crust.
Assessing the shock state of the lunar highlands: Implications for …
2017年7月19日 · Our understanding of the formation and evolution of the primary lunar crust is based on geochemical systematics from the lunar ferroan anorthosite (FAN) suite. Recently, much effort has...
Ferroan anorthosite: A widespread and distinctive lunar rock type
1974年11月1日 · In the magma ocean model for early lunar differentiation, ferroan anorthosites are the first crustal rocks to form on the Moon. If the Moon is as old as the oldest meteorites, the relatively young age determined for 60025 implies either that the magma ocean did not form synchronously with lunar formation, or that the magma ocean required over ...