منابع مشابه
The Composition of the Lunar Surface Relative to Lunar Samples
Introduction: The non-mare pristine samples are divided into two major suites, the ferroan anorthosites (FAN) and the Mg-suite [1]. FAN is typically characterized by high values of plagiophile interelement ratios, for example, the calcium content of plagioclase, and very high plagioclase content (though more mafic members exist). FAN is well separated from the Mgsuite on a plot of Mg-number vs....
متن کاملOrganics in Apollo Lunar Samples
Introduction: One of many unknowns prior to the Apollo landings concerned the possibility of life, its remains, or its organic precursors on the surface of the Moon. While the existence of lunar organisms was considered highly unlikely, a program of biological quarantine and testing for the astronauts, the Apollo Command Modules, and the lunar rock and soil samples , was instituted in the Lunar...
متن کاملFormation times of Meteorites and Lunar Samples
Atopic abundances and the reso lu t ion of small t ime differ ences in the formation of p lane ta ry objects, Earth Planet. Sci Lett., 5, 3 6 1 3 7 6 , 1 9 6 9 . fmn R ®-> Heavy rare gases in silicates f rom t h e Esterville lesosiderite,X Geophys. Res., 71, 2 8 1 5 2 8 2 9 , 1966 . toin R. 0 . , Trapped neon in meteor i t e s , Earth Planet. Sci ' letl 1 1 3 1 8 , 1967 . Pepin R 0 . , and P. ...
متن کاملElectron microprobe analysis of lunar samples.
Plagioclase feldspar, clinopyroxene, and ilmenite in a polished thin section of a type A crystalline rock were analyzed. The clinopyroxene grains are compositionally variable, and both high Ca and low Ca phases are present. The plagioclase is compositionally homogeneous. The ilmenite is chemically homogeneous except for occasional, small areas of high local chromium concentration. Accessory min...
متن کاملImportant Considerations for Lunar Soil Simulants
Lunar samples are not readily available for In-Situ Resource Utilization (ISRU) studies, necessary for preparations for a return to the Moon with landers, robots, and astronauts. Lunar soil simulants have been produced as substitutes for the real thing; BUT how good are they? JSC-1 and 1A were produced only to approximate the geotechnical properties of lunar soil, with its natural glassy compon...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature Geoscience
سال: 2016
ISSN: 1752-0894,1752-0908
DOI: 10.1038/ngeo2637